netconn.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3 Copyright (C) 2002 Mathieu Olivier
   4 Copyright (C) 2003 Forest Hale
   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 "lhnet.h"
  25
  26 // for secure rcon authentication
  27 #include "hmac.h"
  28 #include "mdfour.h"
  29 #include <time.h>
  30
  31 #define QWMASTER_PORT 27000
  32 #define DPMASTER_PORT 27950
  33
  34 // note this defaults on for dedicated servers, off for listen servers
  35 cvar_t sv_public = {0, "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"};
  36 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "120", "how often to send heartbeat in seconds (only used if sv_public is 1)"};
  37
  38 static cvar_t sv_masters [] =
  39 {
  40         {CVAR_SAVE, "sv_master1", "", "user-chosen master server 1"},
  41         {CVAR_SAVE, "sv_master2", "", "user-chosen master server 2"},
  42         {CVAR_SAVE, "sv_master3", "", "user-chosen master server 3"},
  43         {CVAR_SAVE, "sv_master4", "", "user-chosen master server 4"},
  44         {0, "sv_masterextra1", "69.59.212.88", "ghdigital.com - default master server 1 (admin: LordHavoc)"}, // admin: LordHavoc
  45         {0, "sv_masterextra2", "64.22.107.125", "dpmaster.deathmask.net - default master server 2 (admin: Willis)"}, // admin: Willis
  46         {0, "sv_masterextra3", "92.62.40.73", "dpmaster.tchr.no - default master server 3 (admin: tChr)"}, // admin: tChr
  47         {0, NULL, NULL, NULL}
  48 };
  49
  50 static cvar_t sv_qwmasters [] =
  51 {
  52         {CVAR_SAVE, "sv_qwmaster1", "", "user-chosen qwmaster server 1"},
  53         {CVAR_SAVE, "sv_qwmaster2", "", "user-chosen qwmaster server 2"},
  54         {CVAR_SAVE, "sv_qwmaster3", "", "user-chosen qwmaster server 3"},
  55         {CVAR_SAVE, "sv_qwmaster4", "", "user-chosen qwmaster server 4"},
  56         {0, "sv_qwmasterextra1", "master.quakeservers.net:27000", "Global master server. (admin: unknown)"},
  57         {0, "sv_qwmasterextra2", "asgaard.morphos-team.net:27000", "Global master server. (admin: unknown)"},
  58         {0, "sv_qwmasterextra3", "qwmaster.ocrana.de:27000", "German master server. (admin: unknown)"},
  59         {0, "sv_qwmasterextra4", "masterserver.exhale.de:27000", "German master server. (admin: unknown)"},
  60         {0, "sv_qwmasterextra5", "kubus.rulez.pl:27000", "Poland master server. (admin: unknown)"},
  61         {0, NULL, NULL, NULL}
  62 };
  63
  64 static double nextheartbeattime = 0;
  65
  66 sizebuf_t net_message;
  67 static unsigned char net_message_buf[NET_MAXMESSAGE];
  68
  69 cvar_t net_messagetimeout = {0, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"};
  70 cvar_t net_connecttimeout = {0, "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."};
  71 cvar_t net_connectfloodblockingtimeout = {0, "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)"};
  72 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"};
  73 cvar_t developer_networking = {0, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"};
  74
  75 cvar_t cl_netlocalping = {0, "cl_netlocalping","0", "lags local loopback connection by this much ping time (useful to play more fairly on your own server with people with higher pings)"};
  76 static cvar_t cl_netpacketloss_send = {0, "cl_netpacketloss_send","0", "drops this percentage of outgoing packets, useful for testing network protocol robustness (jerky movement, prediction errors, etc)"};
  77 static cvar_t cl_netpacketloss_receive = {0, "cl_netpacketloss_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)"};
  78 static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20", "how many server information requests to send per second"};
  79 static cvar_t net_slist_queriesperframe = {0, "net_slist_queriesperframe", "4", "maximum number of server information requests to send each rendered frame (guards against low framerates causing problems)"};
  80 static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"};
  81 static cvar_t net_slist_pause = {0, "net_slist_pause", "0", "when set to 1, the server list won't update until it is set back to 0"};
  82 static cvar_t net_slist_maxtries = {0, "net_slist_maxtries", "3", "how many times to ask the same server for information (more times gives better ping reports but takes longer)"};
  83 static cvar_t net_slist_favorites = {CVAR_SAVE | CVAR_NQUSERINFOHACK, "net_slist_favorites", "", "contains a list of IP addresses and ports to always query explicitly"};
  84 static cvar_t gameversion = {0, "gameversion", "0", "version of game data (mod-specific) to be sent to querying clients"};
  85 static cvar_t gameversion_min = {0, "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"};
  86 static cvar_t gameversion_max = {0, "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"};
  87 static cvar_t rcon_restricted_password = {CVAR_PRIVATE, "rcon_restricted_password", "", "password to authenticate rcon commands in restricted mode"};
  88 static cvar_t rcon_restricted_commands = {0, "rcon_restricted_commands", "", "allowed commands for rcon when the restricted mode password was used"};
  89 static cvar_t rcon_secure_maxdiff = {0, "rcon_secure_maxdiff", "5", "maximum time difference between rcon request and server system clock (to protect against replay attack)"};
  90 extern cvar_t rcon_secure;
  91
  92 /* statistic counters */
  93 static int packetsSent = 0;
  94 static int packetsReSent = 0;
  95 static int packetsReceived = 0;
  96 static int receivedDuplicateCount = 0;
  97 static int droppedDatagrams = 0;
  98
  99 static int unreliableMessagesSent = 0;
 100 static int unreliableMessagesReceived = 0;
 101 static int reliableMessagesSent = 0;
 102 static int reliableMessagesReceived = 0;
 103
 104 double masterquerytime = -1000;
 105 int masterquerycount = 0;
 106 int masterreplycount = 0;
 107 int serverquerycount = 0;
 108 int serverreplycount = 0;
 109
 110 /// this is only false if there are still servers left to query
 111 static qboolean serverlist_querysleep = true;
 112 static qboolean serverlist_paused = false;
 113 /// this is pushed a second or two ahead of realtime whenever a master server
 114 /// reply is received, to avoid issuing queries while master replies are still
 115 /// flooding in (which would make a mess of the ping times)
 116 static double serverlist_querywaittime = 0;
 117
 118 static unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 119 static unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 120
 121 static int cl_numsockets;
 122 static lhnetsocket_t *cl_sockets[16];
 123 static int sv_numsockets;
 124 static lhnetsocket_t *sv_sockets[16];
 125
 126 netconn_t *netconn_list = NULL;
 127 mempool_t *netconn_mempool = NULL;
 128
 129 cvar_t cl_netport = {0, "cl_port", "0", "forces client to use chosen port number if not 0"};
 130 cvar_t sv_netport = {0, "port", "26000", "server port for players to connect to"};
 131 cvar_t net_address = {0, "net_address", "", "network address to open ipv4 ports on (if empty, use default interfaces)"};
 132 cvar_t net_address_ipv6 = {0, "net_address_ipv6", "", "network address to open ipv6 ports on (if empty, use default interfaces)"};
 133
 134 char net_extresponse[NET_EXTRESPONSE_MAX][1400];
 135 int net_extresponse_count = 0;
 136 int net_extresponse_last = 0;
 137
 138 // ServerList interface
 139 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
 140 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
 141
 142 serverlist_infofield_t serverlist_sortbyfield;
 143 int serverlist_sortflags;
 144
 145 int serverlist_viewcount = 0;
 146 serverlist_entry_t *serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
 147
 148 int serverlist_cachecount;
 149 serverlist_entry_t serverlist_cache[SERVERLIST_TOTALSIZE];
 150
 151 qboolean serverlist_consoleoutput;
 152
 153 static int nFavorites = 0;
 154 static lhnetaddress_t favorites[256];
 155
 156 void NetConn_UpdateFavorites(void)
 157 {
 158         const char *p;
 159         nFavorites = 0;
 160         p = net_slist_favorites.string;
 161         while((size_t) nFavorites < sizeof(favorites) / sizeof(*favorites) && COM_ParseToken_Console(&p))
 162         {
 163                 if(LHNETADDRESS_FromString(&favorites[nFavorites], com_token, 26000))
 164                         ++nFavorites;
 165         }
 166 }
 167
 168 /// helper function to insert a value into the viewset
 169 /// spare entries will be removed
 170 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
 171 {
 172     int i;
 173         if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) {
 174                 i = serverlist_viewcount++;
 175         } else {
 176                 i = SERVERLIST_VIEWLISTSIZE - 1;
 177         }
 178
 179         for( ; i > index ; i-- )
 180                 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
 181
 182         serverlist_viewlist[index] = entry;
 183 }
 184
 185 /// we suppose serverlist_viewcount to be valid, ie > 0
 186 static void _ServerList_ViewList_Helper_Remove( int index )
 187 {
 188         serverlist_viewcount--;
 189         for( ; index < serverlist_viewcount ; index++ )
 190                 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
 191 }
 192
 193 /// \returns true if A should be inserted before B
 194 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
 195 {
 196         int result = 0; // > 0 if for numbers A > B and for text if A < B
 197
 198         if( serverlist_sortflags & SLSF_FAVORITESFIRST )
 199         {
 200                 if(A->info.isfavorite != B->info.isfavorite)
 201                         return A->info.isfavorite;
 202         }
 203
 204         switch( serverlist_sortbyfield ) {
 205                 case SLIF_PING:
 206                         result = A->info.ping - B->info.ping;
 207                         break;
 208                 case SLIF_MAXPLAYERS:
 209                         result = A->info.maxplayers - B->info.maxplayers;
 210                         break;
 211                 case SLIF_NUMPLAYERS:
 212                         result = A->info.numplayers - B->info.numplayers;
 213                         break;
 214                 case SLIF_NUMBOTS:
 215                         result = A->info.numbots - B->info.numbots;
 216                         break;
 217                 case SLIF_NUMHUMANS:
 218                         result = A->info.numhumans - B->info.numhumans;
 219                         break;
 220                 case SLIF_FREESLOTS:
 221                         result = A->info.freeslots - B->info.freeslots;
 222                         break;
 223                 case SLIF_PROTOCOL:
 224                         result = A->info.protocol - B->info.protocol;
 225                         break;
 226                 case SLIF_CNAME:
 227                         result = strcmp( B->info.cname, A->info.cname );
 228                         break;
 229                 case SLIF_GAME:
 230                         result = strcasecmp( B->info.game, A->info.game );
 231                         break;
 232                 case SLIF_MAP:
 233                         result = strcasecmp( B->info.map, A->info.map );
 234                         break;
 235                 case SLIF_MOD:
 236                         result = strcasecmp( B->info.mod, A->info.mod );
 237                         break;
 238                 case SLIF_NAME:
 239                         result = strcasecmp( B->info.name, A->info.name );
 240                         break;
 241                 case SLIF_QCSTATUS:
 242                         result = strcasecmp( B->info.qcstatus, A->info.qcstatus ); // not really THAT useful, though
 243                         break;
 244                 case SLIF_ISFAVORITE:
 245                         result = !!B->info.isfavorite - !!A->info.isfavorite;
 246                         break;
 247                 default:
 248                         Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
 249                         break;
 250         }
 251
 252         if (result != 0)
 253         {
 254                 if( serverlist_sortflags & SLSF_DESCENDING )
 255                         return result > 0;
 256                 else
 257                         return result < 0;
 258         }
 259
 260         // if the chosen sort key is identical, sort by index
 261         // (makes this a stable sort, so that later replies from servers won't
 262         //  shuffle the servers around when they have the same ping)
 263         return A < B;
 264 }
 265
 266 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
 267 {
 268         // This should actually be done with some intermediate and end-of-function return
 269         switch( op ) {
 270                 case SLMO_LESS:
 271                         return A < B;
 272                 case SLMO_LESSEQUAL:
 273                         return A <= B;
 274                 case SLMO_EQUAL:
 275                         return A == B;
 276                 case SLMO_GREATER:
 277                         return A > B;
 278                 case SLMO_NOTEQUAL:
 279                         return A != B;
 280                 case SLMO_GREATEREQUAL:
 281                 case SLMO_CONTAINS:
 282                 case SLMO_NOTCONTAIN:
 283                 case SLMO_STARTSWITH:
 284                 case SLMO_NOTSTARTSWITH:
 285                         return A >= B;
 286                 default:
 287                         Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
 288                         return false;
 289         }
 290 }
 291
 292 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
 293 {
 294         int i;
 295         char bufferA[ 1400 ], bufferB[ 1400 ]; // should be more than enough
 296         COM_StringDecolorize(A, 0, bufferA, sizeof(bufferA), false);
 297         for (i = 0;i < (int)sizeof(bufferA)-1 && bufferA[i];i++)
 298                 bufferA[i] = (bufferA[i] >= 'A' && bufferA[i] <= 'Z') ? (bufferA[i] + 'a' - 'A') : bufferA[i];
 299         bufferA[i] = 0;
 300         for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++)
 301                 bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i];
 302         bufferB[i] = 0;
 303
 304         // Same here, also using an intermediate & final return would be more appropriate
 305         // A info B mask
 306         switch( op ) {
 307                 case SLMO_CONTAINS:
 308                         return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool
 309                 case SLMO_NOTCONTAIN:
 310                         return !*bufferB || !strstr( bufferA, bufferB );
 311                 case SLMO_STARTSWITH:
 312                         //Con_Printf("startsWith: %s %s\n", bufferA, bufferB);
 313                         return *bufferB && !memcmp(bufferA, bufferB, strlen(bufferB));
 314                 case SLMO_NOTSTARTSWITH:
 315                         return !*bufferB || memcmp(bufferA, bufferB, strlen(bufferB));
 316                 case SLMO_LESS:
 317                         return strcmp( bufferA, bufferB ) < 0;
 318                 case SLMO_LESSEQUAL:
 319                         return strcmp( bufferA, bufferB ) <= 0;
 320                 case SLMO_EQUAL:
 321                         return strcmp( bufferA, bufferB ) == 0;
 322                 case SLMO_GREATER:
 323                         return strcmp( bufferA, bufferB ) > 0;
 324                 case SLMO_NOTEQUAL:
 325                         return strcmp( bufferA, bufferB ) != 0;
 326                 case SLMO_GREATEREQUAL:
 327                         return strcmp( bufferA, bufferB ) >= 0;
 328                 default:
 329                         Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
 330                         return false;
 331         }
 332 }
 333
 334 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
 335 {
 336         if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
 337                 return false;
 338         if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
 339                 return false;
 340         if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
 341                 return false;
 342         if( !_ServerList_CompareInt( info->numbots, mask->tests[SLIF_NUMBOTS], mask->info.numbots ) )
 343                 return false;
 344         if( !_ServerList_CompareInt( info->numhumans, mask->tests[SLIF_NUMHUMANS], mask->info.numhumans ) )
 345                 return false;
 346         if( !_ServerList_CompareInt( info->freeslots, mask->tests[SLIF_FREESLOTS], mask->info.freeslots ) )
 347                 return false;
 348         if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
 349                 return false;
 350         if( *mask->info.cname
 351                 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
 352                 return false;
 353         if( *mask->info.game
 354                 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
 355                 return false;
 356         if( *mask->info.mod
 357                 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
 358                 return false;
 359         if( *mask->info.map
 360                 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
 361                 return false;
 362         if( *mask->info.name
 363                 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
 364                 return false;
 365         if( *mask->info.qcstatus
 366                 && !_ServerList_CompareStr( info->qcstatus, mask->tests[SLIF_QCSTATUS], mask->info.qcstatus ) )
 367                 return false;
 368         if( *mask->info.players
 369                 && !_ServerList_CompareStr( info->players, mask->tests[SLIF_PLAYERS], mask->info.players ) )
 370                 return false;
 371         if( !_ServerList_CompareInt( info->isfavorite, mask->tests[SLIF_ISFAVORITE], mask->info.isfavorite ))
 372                 return false;
 373         return true;
 374 }
 375
 376 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
 377 {
 378         int start, end, mid, i;
 379         lhnetaddress_t addr;
 380
 381         // reject incompatible servers
 382         if(
 383                 entry->info.gameversion != gameversion.integer
 384                 &&
 385                 !(
 386                            gameversion_min.integer >= 0 // min/max range set by user/mod?
 387                         && gameversion_max.integer >= 0
 388                         && gameversion_min.integer >= entry->info.gameversion // version of server in min/max range?
 389                         && gameversion_max.integer <= entry->info.gameversion
 390                  )
 391         )
 392                 return;
 393
 394         // refresh the "favorite" status
 395         entry->info.isfavorite = false;
 396         if(LHNETADDRESS_FromString(&addr, entry->info.cname, 26000))
 397         {
 398                 for(i = 0; i < nFavorites; ++i)
 399                 {
 400                         if(LHNETADDRESS_Compare(&addr, &favorites[i]) == 0)
 401                         {
 402                                 entry->info.isfavorite = true;
 403                                 break;
 404                         }
 405                 }
 406         }
 407
 408         // FIXME: change this to be more readable (...)
 409         // now check whether it passes through the masks
 410         for( start = 0 ; start < SERVERLIST_ANDMASKCOUNT && serverlist_andmasks[start].active; start++ )
 411                 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
 412                         return;
 413
 414         for( start = 0 ; start < SERVERLIST_ORMASKCOUNT && serverlist_ormasks[start].active ; start++ )
 415                 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
 416                         break;
 417         if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
 418                 return;
 419
 420         if( !serverlist_viewcount ) {
 421                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 422                 return;
 423         }
 424         // ok, insert it, we just need to find out where exactly:
 425
 426         // two special cases
 427         // check whether to insert it as new first item
 428         if( _ServerList_Entry_Compare( entry, serverlist_viewlist[0] ) ) {
 429                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 430                 return;
 431         } // check whether to insert it as new last item
 432         else if( !_ServerList_Entry_Compare( entry, serverlist_viewlist[serverlist_viewcount - 1] ) ) {
 433                 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
 434                 return;
 435         }
 436         start = 0;
 437         end = serverlist_viewcount - 1;
 438         while( end > start + 1 )
 439         {
 440                 mid = (start + end) / 2;
 441                 // test the item that lies in the middle between start and end
 442                 if( _ServerList_Entry_Compare( entry, serverlist_viewlist[mid] ) )
 443                         // the item has to be in the upper half
 444                         end = mid;
 445                 else
 446                         // the item has to be in the lower half
 447                         start = mid;
 448         }
 449         _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
 450 }
 451
 452 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
 453 {
 454         int i;
 455         for( i = 0; i < serverlist_viewcount; i++ )
 456         {
 457                 if (serverlist_viewlist[i] == entry)
 458                 {
 459                         _ServerList_ViewList_Helper_Remove(i);
 460                         break;
 461                 }
 462         }
 463 }
 464
 465 void ServerList_RebuildViewList(void)
 466 {
 467         int i;
 468
 469         serverlist_viewcount = 0;
 470         for( i = 0 ; i < serverlist_cachecount ; i++ ) {
 471                 serverlist_entry_t *entry = &serverlist_cache[i];
 472                 // also display entries that are currently being refreshed [11/8/2007 Black]
 473                 if( entry->query == SQS_QUERIED || entry->query == SQS_REFRESHING )
 474                         ServerList_ViewList_Insert( entry );
 475         }
 476 }
 477
 478 void ServerList_ResetMasks(void)
 479 {
 480         int i;
 481
 482         memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
 483         memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
 484         // numbots needs to be compared to -1 to always succeed
 485         for(i = 0; i < SERVERLIST_ANDMASKCOUNT; ++i)
 486                 serverlist_andmasks[i].info.numbots = -1;
 487         for(i = 0; i < SERVERLIST_ORMASKCOUNT; ++i)
 488                 serverlist_ormasks[i].info.numbots = -1;
 489 }
 490
 491 void ServerList_GetPlayerStatistics(int *numplayerspointer, int *maxplayerspointer)
 492 {
 493         int i;
 494         int numplayers = 0, maxplayers = 0;
 495         for (i = 0;i < serverlist_cachecount;i++)
 496         {
 497                 if (serverlist_cache[i].query == SQS_QUERIED)
 498                 {
 499                         numplayers += serverlist_cache[i].info.numhumans;
 500                         maxplayers += serverlist_cache[i].info.maxplayers;
 501                 }
 502         }
 503         *numplayerspointer = numplayers;
 504         *maxplayerspointer = maxplayers;
 505 }
 506
 507 #if 0
 508 static void _ServerList_Test(void)
 509 {
 510         int i;
 511         for( i = 0 ; i < 1024 ; i++ ) {
 512                 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) );
 513                 serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i;
 514                 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i );
 515                 serverlist_cache[serverlist_cachecount].finished = true;
 516                 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 );
 517                 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
 518                 serverlist_cachecount++;
 519         }
 520 }
 521 #endif
 522
 523 void ServerList_QueryList(qboolean resetcache, qboolean querydp, qboolean queryqw, qboolean consoleoutput)
 524 {
 525         masterquerytime = realtime;
 526         masterquerycount = 0;
 527         masterreplycount = 0;
 528         if( resetcache ) {
 529                 serverquerycount = 0;
 530                 serverreplycount = 0;
 531                 serverlist_cachecount = 0;
 532                 serverlist_viewcount = 0;
 533         } else {
 534                 // refresh all entries
 535                 int n;
 536                 for( n = 0 ; n < serverlist_cachecount ; n++ ) {
 537                         serverlist_entry_t *entry = &serverlist_cache[ n ];
 538                         entry->query = SQS_REFRESHING;
 539                         entry->querycounter = 0;
 540                 }
 541         }
 542         serverlist_consoleoutput = consoleoutput;
 543
 544         //_ServerList_Test();
 545
 546         NetConn_QueryMasters(querydp, queryqw);
 547 }
 548
 549 // rest
 550
 551 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
 552 {
 553         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 554         int i;
 555         if (length == 0)
 556                 return 0;
 557         if (cl_netpacketloss_receive.integer)
 558                 for (i = 0;i < cl_numsockets;i++)
 559                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_receive.integer)
 560                                 return 0;
 561         if (developer_networking.integer)
 562         {
 563                 char addressstring[128], addressstring2[128];
 564                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 565                 if (length > 0)
 566                 {
 567                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 568                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length, addressstring2);
 569                         Com_HexDumpToConsole((unsigned char *)data, length);
 570                 }
 571                 else
 572                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length);
 573         }
 574         return length;
 575 }
 576
 577 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 578 {
 579         int ret;
 580         int i;
 581         if (cl_netpacketloss_send.integer)
 582                 for (i = 0;i < cl_numsockets;i++)
 583                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_send.integer)
 584                                 return length;
 585         ret = LHNET_Write(mysocket, data, length, peeraddress);
 586         if (developer_networking.integer)
 587         {
 588                 char addressstring[128], addressstring2[128];
 589                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 590                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 591                 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)");
 592                 Com_HexDumpToConsole((unsigned char *)data, length);
 593         }
 594         return ret;
 595 }
 596
 597 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 598 {
 599         // note this does not include the trailing NULL because we add that in the parser
 600         return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress);
 601 }
 602
 603 qboolean NetConn_CanSend(netconn_t *conn)
 604 {
 605         conn->outgoing_packetcounter = (conn->outgoing_packetcounter + 1) % NETGRAPH_PACKETS;
 606         conn->outgoing_netgraph[conn->outgoing_packetcounter].time            = realtime;
 607         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET;
 608         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
 609         conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
 610         if (realtime > conn->cleartime)
 611                 return true;
 612         else
 613         {
 614                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_CHOKEDPACKET;
 615                 return false;
 616         }
 617 }
 618
 619 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol, int rate, qboolean quakesignon_suppressreliables)
 620 {
 621         int totallen = 0;
 622
 623         // if this packet was supposedly choked, but we find ourselves sending one
 624         // anyway, make sure the size counting starts at zero
 625         // (this mostly happens on level changes and disconnects and such)
 626         if (conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes == NETGRAPH_CHOKEDPACKET)
 627                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET;
 628
 629         if (protocol == PROTOCOL_QUAKEWORLD)
 630         {
 631                 int packetLen;
 632                 qboolean sendreliable;
 633
 634                 // note that it is ok to send empty messages to the qw server,
 635                 // otherwise it won't respond to us at all
 636
 637                 sendreliable = false;
 638                 // if the remote side dropped the last reliable message, resend it
 639                 if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence)
 640                         sendreliable = true;
 641                 // if the reliable transmit buffer is empty, copy the current message out
 642                 if (!conn->sendMessageLength && conn->message.cursize)
 643                 {
 644                         memcpy (conn->sendMessage, conn->message.data, conn->message.cursize);
 645                         conn->sendMessageLength = conn->message.cursize;
 646                         SZ_Clear(&conn->message); // clear the message buffer
 647                         conn->qw.reliable_sequence ^= 1;
 648                         sendreliable = true;
 649                 }
 650                 // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1)
 651                 *((int *)(sendbuffer + 0)) = LittleLong((unsigned int)conn->outgoing_unreliable_sequence | ((unsigned int)sendreliable<<31));
 652                 // last received unreliable packet number, and last received reliable packet number (0 or 1)
 653                 *((int *)(sendbuffer + 4)) = LittleLong((unsigned int)conn->qw.incoming_sequence | ((unsigned int)conn->qw.incoming_reliable_sequence<<31));
 654                 packetLen = 8;
 655                 conn->outgoing_unreliable_sequence++;
 656                 // client sends qport in every packet
 657                 if (conn == cls.netcon)
 658                 {
 659                         *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport);
 660                         packetLen += 2;
 661                         // also update cls.qw_outgoing_sequence
 662                         cls.qw_outgoing_sequence = conn->outgoing_unreliable_sequence;
 663                 }
 664                 if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400)
 665                 {
 666                         Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize);
 667                         return -1;
 668                 }
 669
 670                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28;
 671
 672                 // add the reliable message if there is one
 673                 if (sendreliable)
 674                 {
 675                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += conn->sendMessageLength + 28;
 676                         memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength);
 677                         packetLen += conn->sendMessageLength;
 678                         conn->qw.last_reliable_sequence = conn->outgoing_unreliable_sequence;
 679                 }
 680
 681                 // add the unreliable message if possible
 682                 if (packetLen + data->cursize <= 1400)
 683                 {
 684                         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += data->cursize + 28;
 685                         memcpy(sendbuffer + packetLen, data->data, data->cursize);
 686                         packetLen += data->cursize;
 687                 }
 688
 689                 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 690
 691                 packetsSent++;
 692                 unreliableMessagesSent++;
 693
 694                 totallen += packetLen + 28;
 695         }
 696         else
 697         {
 698                 unsigned int packetLen;
 699                 unsigned int dataLen;
 700                 unsigned int eom;
 701                 unsigned int *header;
 702
 703                 // if a reliable message fragment has been lost, send it again
 704                 if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0)
 705                 {
 706                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 707                         {
 708                                 dataLen = conn->sendMessageLength;
 709                                 eom = NETFLAG_EOM;
 710                         }
 711                         else
 712                         {
 713                                 dataLen = MAX_PACKETFRAGMENT;
 714                                 eom = 0;
 715                         }
 716
 717                         packetLen = NET_HEADERSIZE + dataLen;
 718
 719                         header = (unsigned int *)sendbuffer;
 720                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 721                         header[1] = BigLong(conn->nq.sendSequence - 1);
 722                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 723
 724                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28;
 725
 726                         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
 727                         {
 728                                 conn->lastSendTime = realtime;
 729                                 packetsReSent++;
 730                         }
 731
 732                         totallen += packetLen + 28;
 733                 }
 734
 735                 // if we have a new reliable message to send, do so
 736                 if (!conn->sendMessageLength && conn->message.cursize && !quakesignon_suppressreliables)
 737                 {
 738                         if (conn->message.cursize > (int)sizeof(conn->sendMessage))
 739                         {
 740                                 Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, (int)sizeof(conn->sendMessage));
 741                                 conn->message.overflowed = true;
 742                                 return -1;
 743                         }
 744
 745                         if (developer_networking.integer && conn == cls.netcon)
 746                         {
 747                                 Con_Print("client sending reliable message to server:\n");
 748                                 SZ_HexDumpToConsole(&conn->message);
 749                         }
 750
 751                         memcpy(conn->sendMessage, conn->message.data, conn->message.cursize);
 752                         conn->sendMessageLength = conn->message.cursize;
 753                         SZ_Clear(&conn->message);
 754
 755                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 756                         {
 757                                 dataLen = conn->sendMessageLength;
 758                                 eom = NETFLAG_EOM;
 759                         }
 760                         else
 761                         {
 762                                 dataLen = MAX_PACKETFRAGMENT;
 763                                 eom = 0;
 764                         }
 765
 766                         packetLen = NET_HEADERSIZE + dataLen;
 767
 768                         header = (unsigned int *)sendbuffer;
 769                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 770                         header[1] = BigLong(conn->nq.sendSequence);
 771                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 772
 773                         conn->nq.sendSequence++;
 774
 775                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28;
 776
 777                         NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 778
 779                         conn->lastSendTime = realtime;
 780                         packetsSent++;
 781                         reliableMessagesSent++;
 782
 783                         totallen += packetLen + 28;
 784                 }
 785
 786                 // if we have an unreliable message to send, do so
 787                 if (data->cursize)
 788                 {
 789                         packetLen = NET_HEADERSIZE + data->cursize;
 790
 791                         if (packetLen > (int)sizeof(sendbuffer))
 792                         {
 793                                 Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize);
 794                                 return -1;
 795                         }
 796
 797                         header = (unsigned int *)sendbuffer;
 798                         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
 799                         header[1] = BigLong(conn->outgoing_unreliable_sequence);
 800                         memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
 801
 802                         conn->outgoing_unreliable_sequence++;
 803
 804                         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28;
 805
 806                         NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 807
 808                         packetsSent++;
 809                         unreliableMessagesSent++;
 810
 811                         totallen += packetLen + 28;
 812                 }
 813         }
 814
 815         // delay later packets to obey rate limit
 816         if (conn->cleartime < realtime - 0.1)
 817                 conn->cleartime = realtime - 0.1;
 818         conn->cleartime = conn->cleartime + (double)totallen / (double)rate;
 819         if (conn->cleartime < realtime)
 820                 conn->cleartime = realtime;
 821
 822         return 0;
 823 }
 824
 825 qboolean NetConn_HaveClientPorts(void)
 826 {
 827         return !!cl_numsockets;
 828 }
 829
 830 qboolean NetConn_HaveServerPorts(void)
 831 {
 832         return !!sv_numsockets;
 833 }
 834
 835 void NetConn_CloseClientPorts(void)
 836 {
 837         for (;cl_numsockets > 0;cl_numsockets--)
 838                 if (cl_sockets[cl_numsockets - 1])
 839                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 840 }
 841
 842 void NetConn_OpenClientPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport)
 843 {
 844         lhnetaddress_t address;
 845         lhnetsocket_t *s;
 846         int success;
 847         char addressstring2[1024];
 848         if (addressstring && addressstring[0])
 849                 success = LHNETADDRESS_FromString(&address, addressstring, defaultport);
 850         else
 851                 success = LHNETADDRESS_FromPort(&address, addresstype, defaultport);
 852         if (success)
 853         {
 854                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 855                 {
 856                         cl_sockets[cl_numsockets++] = s;
 857                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 858                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
 859                 }
 860                 else
 861                 {
 862                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 863                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 864                 }
 865         }
 866         else
 867                 Con_Printf("Client unable to parse address %s\n", addressstring);
 868 }
 869
 870 void NetConn_OpenClientPorts(void)
 871 {
 872         int port;
 873         NetConn_CloseClientPorts();
 874         port = bound(0, cl_netport.integer, 65535);
 875         if (cl_netport.integer != port)
 876                 Cvar_SetValueQuick(&cl_netport, port);
 877         if(port == 0)
 878                 Con_Printf("Client using an automatically assigned port\n");
 879         else
 880                 Con_Printf("Client using port %i\n", port);
 881         NetConn_OpenClientPort(NULL, LHNETADDRESSTYPE_LOOP, 2);
 882         NetConn_OpenClientPort(net_address.string, LHNETADDRESSTYPE_INET4, port);
 883         NetConn_OpenClientPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port);
 884 }
 885
 886 void NetConn_CloseServerPorts(void)
 887 {
 888         for (;sv_numsockets > 0;sv_numsockets--)
 889                 if (sv_sockets[sv_numsockets - 1])
 890                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 891 }
 892
 893 qboolean NetConn_OpenServerPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport, int range)
 894 {
 895         lhnetaddress_t address;
 896         lhnetsocket_t *s;
 897         int port;
 898         char addressstring2[1024];
 899         int success;
 900
 901         for (port = defaultport; port <= defaultport + range; port++)
 902         {
 903                 if (addressstring && addressstring[0])
 904                         success = LHNETADDRESS_FromString(&address, addressstring, port);
 905                 else
 906                         success = LHNETADDRESS_FromPort(&address, addresstype, port);
 907                 if (success)
 908                 {
 909                         if ((s = LHNET_OpenSocket_Connectionless(&address)))
 910                         {
 911                                 sv_sockets[sv_numsockets++] = s;
 912                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 913                                 Con_Printf("Server listening on address %s\n", addressstring2);
 914                                 return true;
 915                         }
 916                         else
 917                         {
 918                                 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 919                                 Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 920                         }
 921                 }
 922                 else
 923                 {
 924                         Con_Printf("Server unable to parse address %s\n", addressstring);
 925                         // if it cant parse one address, it wont be able to parse another for sure
 926                         return false;
 927                 }
 928         }
 929         return false;
 930 }
 931
 932 void NetConn_OpenServerPorts(int opennetports)
 933 {
 934         int port;
 935         NetConn_CloseServerPorts();
 936         NetConn_UpdateSockets();
 937         port = bound(0, sv_netport.integer, 65535);
 938         if (port == 0)
 939                 port = 26000;
 940         Con_Printf("Server using port %i\n", port);
 941         if (sv_netport.integer != port)
 942                 Cvar_SetValueQuick(&sv_netport, port);
 943         if (cls.state != ca_dedicated)
 944                 NetConn_OpenServerPort(NULL, LHNETADDRESSTYPE_LOOP, 1, 1);
 945         if (opennetports)
 946         {
 947                 qboolean ip4success = NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100);
 948                 NetConn_OpenServerPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port, ip4success ? 1 : 100);
 949         }
 950         if (sv_numsockets == 0)
 951                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!");
 952 }
 953
 954 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
 955 {
 956         int i, a = LHNETADDRESS_GetAddressType(address);
 957         for (i = 0;i < cl_numsockets;i++)
 958                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
 959                         return cl_sockets[i];
 960         return NULL;
 961 }
 962
 963 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
 964 {
 965         int i, a = LHNETADDRESS_GetAddressType(address);
 966         for (i = 0;i < sv_numsockets;i++)
 967                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
 968                         return sv_sockets[i];
 969         return NULL;
 970 }
 971
 972 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 973 {
 974         netconn_t *conn;
 975         conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn));
 976         conn->mysocket = mysocket;
 977         conn->peeraddress = *peeraddress;
 978         conn->lastMessageTime = realtime;
 979         conn->message.data = conn->messagedata;
 980         conn->message.maxsize = sizeof(conn->messagedata);
 981         conn->message.cursize = 0;
 982         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
 983         // reduce effectiveness of connection request floods
 984         conn->timeout = realtime + net_connecttimeout.value;
 985         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
 986         conn->next = netconn_list;
 987         netconn_list = conn;
 988         return conn;
 989 }
 990
 991 void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress);
 992 void NetConn_Close(netconn_t *conn)
 993 {
 994         netconn_t *c;
 995         // remove connection from list
 996
 997         // allow the client to reconnect immediately
 998         NetConn_ClearConnectFlood(&(conn->peeraddress));
 999
1000         if (conn == netconn_list)
1001                 netconn_list = conn->next;
1002         else
1003         {
1004                 for (c = netconn_list;c;c = c->next)
1005                 {
1006                         if (c->next == conn)
1007                         {
1008                                 c->next = conn->next;
1009                                 break;
1010                         }
1011                 }
1012                 // not found in list, we'll avoid crashing here...
1013                 if (!c)
1014                         return;
1015         }
1016         // free connection
1017         Mem_Free(conn);
1018 }
1019
1020 static int clientport = -1;
1021 static int clientport2 = -1;
1022 static int hostport = -1;
1023 void NetConn_UpdateSockets(void)
1024 {
1025         if (cls.state != ca_dedicated)
1026         {
1027                 if (clientport2 != cl_netport.integer)
1028                 {
1029                         clientport2 = cl_netport.integer;
1030                         if (cls.state == ca_connected)
1031                                 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
1032                 }
1033                 if (cls.state == ca_disconnected && clientport != clientport2)
1034                 {
1035                         clientport = clientport2;
1036                         NetConn_CloseClientPorts();
1037                 }
1038                 if (cl_numsockets == 0)
1039                         NetConn_OpenClientPorts();
1040         }
1041
1042         if (hostport != sv_netport.integer)
1043         {
1044                 hostport = sv_netport.integer;
1045                 if (sv.active)
1046                         Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
1047         }
1048 }
1049
1050 static int NetConn_ReceivedMessage(netconn_t *conn, unsigned char *data, int length, protocolversion_t protocol, double newtimeout)
1051 {
1052         int originallength = length;
1053         if (length < 8)
1054                 return 0;
1055
1056         if (protocol == PROTOCOL_QUAKEWORLD)
1057         {
1058                 int sequence, sequence_ack;
1059                 int reliable_ack, reliable_message;
1060                 int count;
1061                 int qport;
1062
1063                 sequence = LittleLong(*((int *)(data + 0)));
1064                 sequence_ack = LittleLong(*((int *)(data + 4)));
1065                 data += 8;
1066                 length -= 8;
1067
1068                 if (conn != cls.netcon)
1069                 {
1070                         // server only
1071                         if (length < 2)
1072                                 return 0;
1073                         // 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?)
1074                         qport = LittleShort(*((int *)(data + 8)));
1075                         data += 2;
1076                         length -= 2;
1077                 }
1078
1079                 packetsReceived++;
1080                 reliable_message = (sequence >> 31) & 1;
1081                 reliable_ack = (sequence_ack >> 31) & 1;
1082                 sequence &= ~(1<<31);
1083                 sequence_ack &= ~(1<<31);
1084                 if (sequence <= conn->qw.incoming_sequence)
1085                 {
1086                         //Con_DPrint("Got a stale datagram\n");
1087                         return 0;
1088                 }
1089                 count = sequence - (conn->qw.incoming_sequence + 1);
1090                 if (count > 0)
1091                 {
1092                         droppedDatagrams += count;
1093                         //Con_DPrintf("Dropped %u datagram(s)\n", count);
1094                         while (count--)
1095                         {
1096                                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1097                                 conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1098                                 conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET;
1099                                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1100                                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1101                         }
1102                 }
1103                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1104                 conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1105                 conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28;
1106                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1107                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1108                 if (reliable_ack == conn->qw.reliable_sequence)
1109                 {
1110                         // received, now we will be able to send another reliable message
1111                         conn->sendMessageLength = 0;
1112                         reliableMessagesReceived++;
1113                 }
1114                 conn->qw.incoming_sequence = sequence;
1115                 if (conn == cls.netcon)
1116                         cls.qw_incoming_sequence = conn->qw.incoming_sequence;
1117                 conn->qw.incoming_acknowledged = sequence_ack;
1118                 conn->qw.incoming_reliable_acknowledged = reliable_ack;
1119                 if (reliable_message)
1120                         conn->qw.incoming_reliable_sequence ^= 1;
1121                 conn->lastMessageTime = realtime;
1122                 conn->timeout = realtime + newtimeout;
1123                 unreliableMessagesReceived++;
1124                 SZ_Clear(&net_message);
1125                 SZ_Write(&net_message, data, length);
1126                 MSG_BeginReading();
1127                 return 2;
1128         }
1129         else
1130         {
1131                 unsigned int count;
1132                 unsigned int flags;
1133                 unsigned int sequence;
1134                 int qlength;
1135
1136                 qlength = (unsigned int)BigLong(((int *)data)[0]);
1137                 flags = qlength & ~NETFLAG_LENGTH_MASK;
1138                 qlength &= NETFLAG_LENGTH_MASK;
1139                 // control packets were already handled
1140                 if (!(flags & NETFLAG_CTL) && qlength == length)
1141                 {
1142                         sequence = BigLong(((int *)data)[1]);
1143                         packetsReceived++;
1144                         data += 8;
1145                         length -= 8;
1146                         if (flags & NETFLAG_UNRELIABLE)
1147                         {
1148                                 if (sequence >= conn->nq.unreliableReceiveSequence)
1149                                 {
1150                                         if (sequence > conn->nq.unreliableReceiveSequence)
1151                                         {
1152                                                 count = sequence - conn->nq.unreliableReceiveSequence;
1153                                                 droppedDatagrams += count;
1154                                                 //Con_DPrintf("Dropped %u datagram(s)\n", count);
1155                                                 while (count--)
1156                                                 {
1157                                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1158                                                         conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1159                                                         conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET;
1160                                                         conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1161                                                         conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1162                                                 }
1163                                         }
1164                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1165                                         conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1166                                         conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28;
1167                                         conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1168                                         conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1169                                         conn->nq.unreliableReceiveSequence = sequence + 1;
1170                                         conn->lastMessageTime = realtime;
1171                                         conn->timeout = realtime + newtimeout;
1172                                         unreliableMessagesReceived++;
1173                                         if (length > 0)
1174                                         {
1175                                                 SZ_Clear(&net_message);
1176                                                 SZ_Write(&net_message, data, length);
1177                                                 MSG_BeginReading();
1178                                                 return 2;
1179                                         }
1180                                 }
1181                                 //else
1182                                 //      Con_DPrint("Got a stale datagram\n");
1183                                 return 1;
1184                         }
1185                         else if (flags & NETFLAG_ACK)
1186                         {
1187                                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes += originallength + 28;
1188                                 if (sequence == (conn->nq.sendSequence - 1))
1189                                 {
1190                                         if (sequence == conn->nq.ackSequence)
1191                                         {
1192                                                 conn->nq.ackSequence++;
1193                                                 if (conn->nq.ackSequence != conn->nq.sendSequence)
1194                                                         Con_DPrint("ack sequencing error\n");
1195                                                 conn->lastMessageTime = realtime;
1196                                                 conn->timeout = realtime + newtimeout;
1197                                                 if (conn->sendMessageLength > MAX_PACKETFRAGMENT)
1198                                                 {
1199                                                         unsigned int packetLen;
1200                                                         unsigned int dataLen;
1201                                                         unsigned int eom;
1202                                                         unsigned int *header;
1203
1204                                                         conn->sendMessageLength -= MAX_PACKETFRAGMENT;
1205                                                         memmove(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
1206
1207                                                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
1208                                                         {
1209                                                                 dataLen = conn->sendMessageLength;
1210                                                                 eom = NETFLAG_EOM;
1211                                                         }
1212                                                         else
1213                                                         {
1214                                                                 dataLen = MAX_PACKETFRAGMENT;
1215                                                                 eom = 0;
1216                                                         }
1217
1218                                                         packetLen = NET_HEADERSIZE + dataLen;
1219
1220                                                         header = (unsigned int *)sendbuffer;
1221                                                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
1222                                                         header[1] = BigLong(conn->nq.sendSequence);
1223                                                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
1224
1225                                                         conn->nq.sendSequence++;
1226
1227                                                         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
1228                                                         {
1229                                                                 conn->lastSendTime = realtime;
1230                                                                 packetsSent++;
1231                                                         }
1232                                                 }
1233                                                 else
1234                                                         conn->sendMessageLength = 0;
1235                                         }
1236                                         //else
1237                                         //      Con_DPrint("Duplicate ACK received\n");
1238                                 }
1239                                 //else
1240                                 //      Con_DPrint("Stale ACK received\n");
1241                                 return 1;
1242                         }
1243                         else if (flags & NETFLAG_DATA)
1244                         {
1245                                 unsigned int temppacket[2];
1246                                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   += originallength + 28;
1247                                 conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes        += 8 + 28;
1248                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
1249                                 temppacket[1] = BigLong(sequence);
1250                                 NetConn_Write(conn->mysocket, (unsigned char *)temppacket, 8, &conn->peeraddress);
1251                                 if (sequence == conn->nq.receiveSequence)
1252                                 {
1253                                         conn->lastMessageTime = realtime;
1254                                         conn->timeout = realtime + newtimeout;
1255                                         conn->nq.receiveSequence++;
1256                                         if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) {
1257                                                 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
1258                                                 conn->receiveMessageLength += length;
1259                                         } else {
1260                                                 Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n"
1261                                                                         "Dropping the message!\n", sequence );
1262                                                 conn->receiveMessageLength = 0;
1263                                                 return 1;
1264                                         }
1265                                         if (flags & NETFLAG_EOM)
1266                                         {
1267                                                 reliableMessagesReceived++;
1268                                                 length = conn->receiveMessageLength;
1269                                                 conn->receiveMessageLength = 0;
1270                                                 if (length > 0)
1271                                                 {
1272                                                         SZ_Clear(&net_message);
1273                                                         SZ_Write(&net_message, conn->receiveMessage, length);
1274                                                         MSG_BeginReading();
1275                                                         return 2;
1276                                                 }
1277                                         }
1278                                 }
1279                                 else
1280                                         receivedDuplicateCount++;
1281                                 return 1;
1282                         }
1283                 }
1284         }
1285         return 0;
1286 }
1287
1288 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol)
1289 {
1290         cls.connect_trying = false;
1291         M_Update_Return_Reason("");
1292         // the connection request succeeded, stop current connection and set up a new connection
1293         CL_Disconnect();
1294         // if we're connecting to a remote server, shut down any local server
1295         if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active)
1296                 Host_ShutdownServer ();
1297         // allocate a net connection to keep track of things
1298         cls.netcon = NetConn_Open(mysocket, peeraddress);
1299         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
1300         key_dest = key_game;
1301         m_state = m_none;
1302         cls.demonum = -1;                       // not in the demo loop now
1303         cls.state = ca_connected;
1304         cls.signon = 0;                         // need all the signon messages before playing
1305         cls.protocol = initialprotocol;
1306         // reset move sequence numbering on this new connection
1307         cls.servermovesequence = 0;
1308         if (cls.protocol == PROTOCOL_QUAKEWORLD)
1309                 Cmd_ForwardStringToServer("new");
1310         if (cls.protocol == PROTOCOL_QUAKE)
1311         {
1312                 // write a keepalive (clc_nop) as it seems to greatly improve the
1313                 // chances of connecting to a netquake server
1314                 sizebuf_t msg;
1315                 unsigned char buf[4];
1316                 memset(&msg, 0, sizeof(msg));
1317                 msg.data = buf;
1318                 msg.maxsize = sizeof(buf);
1319                 MSG_WriteChar(&msg, clc_nop);
1320                 NetConn_SendUnreliableMessage(cls.netcon, &msg, cls.protocol, 10000, false);
1321         }
1322 }
1323
1324 int NetConn_IsLocalGame(void)
1325 {
1326         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
1327                 return true;
1328         return false;
1329 }
1330
1331 static int NetConn_ClientParsePacket_ServerList_ProcessReply(const char *addressstring)
1332 {
1333         int n;
1334         int pingtime;
1335         serverlist_entry_t *entry = NULL;
1336
1337         // search the cache for this server and update it
1338         for (n = 0;n < serverlist_cachecount;n++) {
1339                 entry = &serverlist_cache[ n ];
1340                 if (!strcmp(addressstring, entry->info.cname))
1341                         break;
1342         }
1343
1344         if (n == serverlist_cachecount)
1345         {
1346                 // LAN search doesnt require an answer from the master server so we wont
1347                 // know the ping nor will it be initialized already...
1348
1349                 // find a slot
1350                 if (serverlist_cachecount == SERVERLIST_TOTALSIZE)
1351                         return -1;
1352
1353                 entry = &serverlist_cache[n];
1354
1355                 memset(entry, 0, sizeof(*entry));
1356                 // store the data the engine cares about (address and ping)
1357                 strlcpy(entry->info.cname, addressstring, sizeof(entry->info.cname));
1358                 entry->info.ping = 100000;
1359                 entry->querytime = realtime;
1360                 // if not in the slist menu we should print the server to console
1361                 if (serverlist_consoleoutput)
1362                         Con_Printf("querying %s\n", addressstring);
1363                 ++serverlist_cachecount;
1364         }
1365         // if this is the first reply from this server, count it as having replied
1366         pingtime = (int)((realtime - entry->querytime) * 1000.0 + 0.5);
1367         pingtime = bound(0, pingtime, 9999);
1368         if (entry->query == SQS_REFRESHING) {
1369                 entry->info.ping = pingtime;
1370                 entry->query = SQS_QUERIED;
1371         } else {
1372                 // convert to unsigned to catch the -1
1373                 // 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]
1374                 entry->info.ping = min((unsigned) entry->info.ping, (unsigned) pingtime);
1375                 serverreplycount++;
1376         }
1377
1378         // other server info is updated by the caller
1379         return n;
1380 }
1381
1382 static void NetConn_ClientParsePacket_ServerList_UpdateCache(int n)
1383 {
1384         serverlist_entry_t *entry = &serverlist_cache[n];
1385         serverlist_info_t *info = &entry->info;
1386         // update description strings for engine menu and console output
1387         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);
1388         dpsnprintf(entry->line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s ^%c%-17.17s^4 %-20.20s", info->cname, info->game,
1389                         (
1390                          info->gameversion != gameversion.integer
1391                          &&
1392                          !(
1393                                     gameversion_min.integer >= 0 // min/max range set by user/mod?
1394                                  && gameversion_max.integer >= 0
1395                                  && gameversion_min.integer >= info->gameversion // version of server in min/max range?
1396                                  && gameversion_max.integer <= info->gameversion
1397                           )
1398                         ) ? '1' : '4',
1399                         info->mod, info->map);
1400         if (entry->query == SQS_QUERIED)
1401         {
1402                 if(!serverlist_paused)
1403                         ServerList_ViewList_Remove(entry);
1404         }
1405         // if not in the slist menu we should print the server to console (if wanted)
1406         else if( serverlist_consoleoutput )
1407                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1408         // and finally, update the view set
1409         if(!serverlist_paused)
1410                 ServerList_ViewList_Insert( entry );
1411         //      update the entry's state
1412         serverlist_cache[n].query = SQS_QUERIED;
1413 }
1414
1415 // returns true, if it's sensible to continue the processing
1416 static qboolean NetConn_ClientParsePacket_ServerList_PrepareQuery( int protocol, const char *ipstring, qboolean isfavorite ) {
1417         int n;
1418         serverlist_entry_t *entry;
1419
1420         //      ignore the rest of the message if the serverlist is full
1421         if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1422                 return false;
1423         //      also ignore     it      if      we      have already queried    it      (other master server    response)
1424         for( n =        0 ; n   < serverlist_cachecount ; n++   )
1425                 if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1426                         break;
1427
1428         entry = &serverlist_cache[n];
1429
1430         if( n < serverlist_cachecount ) {
1431                 // the entry has already been queried once or
1432                 return true;
1433         }
1434
1435         memset(entry, 0, sizeof(entry));
1436         entry->protocol =       protocol;
1437         //      store   the data        the engine cares about (address and     ping)
1438         strlcpy (entry->info.cname, ipstring, sizeof(entry->info.cname));
1439
1440         entry->info.isfavorite = isfavorite;
1441
1442         // no, then reset the ping right away
1443         entry->info.ping = -1;
1444         // we also want to increase the serverlist_cachecount then
1445         serverlist_cachecount++;
1446         serverquerycount++;
1447
1448         entry->query =  SQS_QUERYING;
1449
1450         return true;
1451 }
1452
1453 static void NetConn_ClientParsePacket_ServerList_ParseDPList(lhnetaddress_t *senderaddress, const unsigned char *data, int length, qboolean isextended)
1454 {
1455         masterreplycount++;
1456         if (serverlist_consoleoutput)
1457                 Con_Printf("received DarkPlaces %sserver list...\n", isextended ? "extended " : "");
1458         while (length >= 7)
1459         {
1460                 char ipstring [128];
1461
1462                 // IPv4 address
1463                 if (data[0] == '\\')
1464                 {
1465                         unsigned short port = data[5] * 256 + data[6];
1466
1467                         if (port != 0 && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF))
1468                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%hu", data[1], data[2], data[3], data[4], port);
1469
1470                         // move on to next address in packet
1471                         data += 7;
1472                         length -= 7;
1473                 }
1474                 // IPv6 address
1475                 else if (data[0] == '/' && isextended && length >= 19)
1476                 {
1477                         unsigned short port = data[17] * 256 + data[18];
1478
1479                         if (port != 0)
1480                         {
1481                                 const char *ifname;
1482
1483                                 /// \TODO: make some basic checks of the IP address (broadcast, ...)
1484
1485                                 ifname = LHNETADDRESS_GetInterfaceName(senderaddress);
1486                                 if (ifname != NULL)
1487                                 {
1488                                         dpsnprintf (ipstring, sizeof (ipstring), "[%x%02x:%x%02x:%x%02x:%x%02x:%x%02x:%x%02x:%x%02x:%x%02x%%%s]:%hu",
1489                                                                 data[1], data[2], data[3], data[4], data[5], data[6], data[7], data[8],
1490                                                                 data[9], data[10], data[11], data[12], data[13], data[14], data[15], data[16],
1491                                                                 ifname, port);
1492                                 }
1493                                 else
1494                                 {
1495                                         dpsnprintf (ipstring, sizeof (ipstring), "[%x%02x:%x%02x:%x%02x:%x%02x:%x%02x:%x%02x:%x%02x:%x%02x]:%hu",
1496                                                                 data[1], data[2], data[3], data[4], data[5], data[6], data[7], data[8],
1497                                                                 data[9], data[10], data[11], data[12], data[13], data[14], data[15], data[16],
1498                                                                 port);
1499                                 }
1500                         }
1501
1502                         // move on to next address in packet
1503                         data += 19;
1504                         length -= 19;
1505                 }
1506                 else
1507                 {
1508                         Con_Print("Error while parsing the server list\n");
1509                         break;
1510                 }
1511
1512                 if (serverlist_consoleoutput && developer_networking.integer)
1513                         Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring);
1514
1515                 if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, ipstring, false ) ) {
1516                         break;
1517                 }
1518
1519         }
1520
1521         // begin or resume serverlist queries
1522         serverlist_querysleep = false;
1523         serverlist_querywaittime = realtime + 3;
1524 }
1525
1526 static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1527 {
1528         qboolean fromserver;
1529         int ret, c, control;
1530         const char *s;
1531         char *string, addressstring2[128], ipstring[32];
1532         char stringbuf[16384];
1533
1534         // quakeworld ingame packet
1535         fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress);
1536
1537         // convert the address to a string incase we need it
1538         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1539
1540         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1541         {
1542                 // received a command string - strip off the packaging and put it
1543                 // into our string buffer with NULL termination
1544                 data += 4;
1545                 length -= 4;
1546                 length = min(length, (int)sizeof(stringbuf) - 1);
1547                 memcpy(stringbuf, data, length);
1548                 stringbuf[length] = 0;
1549                 string = stringbuf;
1550
1551                 if (developer_networking.integer)
1552                 {
1553                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
1554                         Com_HexDumpToConsole(data, length);
1555                 }
1556
1557                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
1558                 {
1559                         // darkplaces or quake3
1560                         char protocolnames[1400];
1561                         Protocol_Names(protocolnames, sizeof(protocolnames));
1562                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
1563                         M_Update_Return_Reason("Got challenge response");
1564                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1565                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1566                         // TODO: add userinfo stuff here instead of using NQ commands?
1567                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s\\challenge\\%s", protocolnames, string + 10), peeraddress);
1568                         return true;
1569                 }
1570                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
1571                 {
1572                         // darkplaces or quake3
1573                         M_Update_Return_Reason("Accepted");
1574                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3);
1575                         return true;
1576                 }
1577                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
1578                 {
1579                         char rejectreason[32];
1580                         cls.connect_trying = false;
1581                         string += 7;
1582                         length = min(length - 7, (int)sizeof(rejectreason) - 1);
1583                         memcpy(rejectreason, string, length);
1584                         rejectreason[length] = 0;
1585                         M_Update_Return_Reason(rejectreason);
1586                         return true;
1587                 }
1588                 if (length >= 15 && !memcmp(string, "statusResponse\x0A", 15))
1589                 {
1590                         serverlist_info_t *info;
1591                         char *p;
1592                         int n;
1593
1594                         string += 15;
1595                         // search the cache for this server and update it
1596                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1597                         if (n < 0)
1598                                 return true;
1599
1600                         info = &serverlist_cache[n].info;
1601                         info->game[0] = 0;
1602                         info->mod[0]  = 0;
1603                         info->map[0]  = 0;
1604                         info->name[0] = 0;
1605                         info->qcstatus[0] = 0;
1606                         info->players[0] = 0;
1607                         info->protocol = -1;
1608                         info->numplayers = 0;
1609                         info->numbots = -1;
1610                         info->maxplayers  = 0;
1611                         info->gameversion = 0;
1612
1613                         p = strchr(string, '\n');
1614                         if(p)
1615                         {
1616                                 *p = 0; // cut off the string there
1617                                 ++p;
1618                         }
1619                         else
1620                                 Con_Printf("statusResponse without players block?\n");
1621
1622                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(info->game, s, sizeof (info->game));
1623                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
1624                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(info->map , s, sizeof (info->map ));
1625                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));
1626                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) info->protocol = atoi(s);
1627                         if ((s = SearchInfostring(string, "clients"      )) != NULL) info->numplayers = atoi(s);
1628                         if ((s = SearchInfostring(string, "bots"         )) != NULL) info->numbots = atoi(s);
1629                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);
1630                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);
1631                         if ((s = SearchInfostring(string, "qcstatus"     )) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus));
1632                         if (p                                               != NULL) strlcpy(info->players, p, sizeof(info->players));
1633                         info->numhumans = info->numplayers - max(0, info->numbots);
1634                         info->freeslots = info->maxplayers - info->numplayers;
1635
1636                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1637
1638                         return true;
1639                 }
1640                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
1641                 {
1642                         serverlist_info_t *info;
1643                         int n;
1644
1645                         string += 13;
1646                         // search the cache for this server and update it
1647                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1648                         if (n < 0)
1649                                 return true;
1650
1651                         info = &serverlist_cache[n].info;
1652                         info->game[0] = 0;
1653                         info->mod[0]  = 0;
1654                         info->map[0]  = 0;
1655                         info->name[0] = 0;
1656                         info->qcstatus[0] = 0;
1657                         info->players[0] = 0;
1658                         info->protocol = -1;
1659                         info->numplayers = 0;
1660                         info->numbots = -1;
1661                         info->maxplayers  = 0;
1662                         info->gameversion = 0;
1663
1664                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(info->game, s, sizeof (info->game));
1665                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
1666                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(info->map , s, sizeof (info->map ));
1667                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));
1668                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) info->protocol = atoi(s);
1669                         if ((s = SearchInfostring(string, "clients"      )) != NULL) info->numplayers = atoi(s);
1670                         if ((s = SearchInfostring(string, "bots"         )) != NULL) info->numbots = atoi(s);
1671                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);
1672                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);
1673                         if ((s = SearchInfostring(string, "qcstatus"     )) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus));
1674                         info->numhumans = info->numplayers - max(0, info->numbots);
1675                         info->freeslots = info->maxplayers - info->numplayers;
1676
1677                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1678
1679                         return true;
1680                 }
1681                 if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1682                 {
1683                         // Extract the IP addresses
1684                         data += 18;
1685                         length -= 18;
1686                         NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, false);
1687                         return true;
1688                 }
1689                 if (!strncmp(string, "getserversExtResponse", 21) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1690                 {
1691                         // Extract the IP addresses
1692                         data += 21;
1693                         length -= 21;
1694                         NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, true);
1695                         return true;
1696                 }
1697                 if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1698                 {
1699                         // Extract the IP addresses
1700                         data += 2;
1701                         length -= 2;
1702                         masterreplycount++;
1703                         if (serverlist_consoleoutput)
1704                                 Con_Printf("received QuakeWorld server list from %s...\n", addressstring2);
1705                         while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0)
1706                         {
1707                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]);
1708                                 if (serverlist_consoleoutput && developer_networking.integer)
1709                                         Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring);
1710
1711                                 if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, ipstring, false ) ) {
1712                                         break;
1713                                 }
1714
1715                                 // move on to next address in packet
1716                                 data += 6;
1717                                 length -= 6;
1718                         }
1719                         // begin or resume serverlist queries
1720                         serverlist_querysleep = false;
1721                         serverlist_querywaittime = realtime + 3;
1722                         return true;
1723                 }
1724                 if (!strncmp(string, "extResponse ", 12))
1725                 {
1726                         ++net_extresponse_count;
1727                         if(net_extresponse_count > NET_EXTRESPONSE_MAX)
1728                                 net_extresponse_count = NET_EXTRESPONSE_MAX;
1729                         net_extresponse_last = (net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
1730                         dpsnprintf(net_extresponse[net_extresponse_last], sizeof(net_extresponse[net_extresponse_last]), "'%s' %s", addressstring2, string + 12);
1731                         return true;
1732                 }
1733                 if (!strncmp(string, "ping", 4))
1734                 {
1735                         if (developer.integer >= 10)
1736                                 Con_Printf("Received ping from %s, sending ack\n", addressstring2);
1737                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1738                         return true;
1739                 }
1740                 if (!strncmp(string, "ack", 3))
1741                         return true;
1742                 // QuakeWorld compatibility
1743                 if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')) && cls.connect_trying)
1744                 {
1745                         // challenge message
1746                         Con_Printf("challenge %s received, sending QuakeWorld connect request back to %s\n", string + 1, addressstring2);
1747                         M_Update_Return_Reason("Got QuakeWorld challenge response");
1748                         cls.qw_qport = qport.integer;
1749                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1750                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1751                         NetConn_WriteString(mysocket, va("\377\377\377\377connect %i %i %i \"%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo), peeraddress);
1752                         return true;
1753                 }
1754                 if (length >= 1 && string[0] == 'j' && cls.connect_trying)
1755                 {
1756                         // accept message
1757                         M_Update_Return_Reason("QuakeWorld Accepted");
1758                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
1759                         return true;
1760                 }
1761                 if (length > 2 && !memcmp(string, "n\\", 2))
1762                 {
1763                         serverlist_info_t *info;
1764                         int n;
1765
1766                         // qw server status
1767                         if (serverlist_consoleoutput && developer_networking.integer >= 2)
1768                                 Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1);
1769
1770                         string += 1;
1771                         // search the cache for this server and update it
1772                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1773                         if (n < 0)
1774                                 return true;
1775
1776                         info = &serverlist_cache[n].info;
1777                         strlcpy(info->game, "QuakeWorld", sizeof(info->game));
1778                         if ((s = SearchInfostring(string, "*gamedir"     )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
1779                         if ((s = SearchInfostring(string, "map"          )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
1780                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1781                         info->protocol = 0;
1782                         info->numplayers = 0; // updated below
1783                         info->numhumans = 0; // updated below
1784                         if ((s = SearchInfostring(string, "maxclients"   )) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
1785                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
1786
1787                         // count active players on server
1788                         // (we could gather more info, but we're just after the number)
1789                         s = strchr(string, '\n');
1790                         if (s)
1791                         {
1792                                 s++;
1793                                 while (s < string + length)
1794                                 {
1795                                         for (;s < string + length && *s != '\n';s++)
1796                                                 ;
1797                                         if (s >= string + length)
1798                                                 break;
1799                                         info->numplayers++;
1800                                         info->numhumans++;
1801                                         s++;
1802                                 }
1803                         }
1804
1805                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1806
1807                         return true;
1808                 }
1809                 if (string[0] == 'n')
1810                 {
1811                         // qw print command
1812                         Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1);
1813                 }
1814                 // we may not have liked the packet, but it was a command packet, so
1815                 // we're done processing this packet now
1816                 return true;
1817         }
1818         // quakeworld ingame packet
1819         if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
1820         {
1821                 ret = 0;
1822                 CL_ParseServerMessage();
1823                 return ret;
1824         }
1825         // netquake control packets, supported for compatibility only
1826         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1827         {
1828                 int n;
1829                 serverlist_info_t *info;
1830
1831                 data += 4;
1832                 length -= 4;
1833                 SZ_Clear(&net_message);
1834                 SZ_Write(&net_message, data, length);
1835                 MSG_BeginReading();
1836                 c = MSG_ReadByte();
1837                 switch (c)
1838                 {
1839                 case CCREP_ACCEPT:
1840                         if (developer.integer >= 10)
1841                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
1842                         if (cls.connect_trying)
1843                         {
1844                                 lhnetaddress_t clientportaddress;
1845                                 clientportaddress = *peeraddress;
1846                                 LHNETADDRESS_SetPort(&clientportaddress, MSG_ReadLong());
1847                                 // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1848                                 InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1849                                 M_Update_Return_Reason("Accepted");
1850                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE);
1851                         }
1852                         break;
1853                 case CCREP_REJECT:
1854                         if (developer.integer >= 10)
1855                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
1856                         cls.connect_trying = false;
1857                         M_Update_Return_Reason((char *)MSG_ReadString());
1858                         break;
1859                 case CCREP_SERVER_INFO:
1860                         if (developer.integer >= 10)
1861                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
1862                         // LordHavoc: because the quake server may report weird addresses
1863                         // we just ignore it and keep the real address
1864                         MSG_ReadString();
1865                         // search the cache for this server and update it
1866                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1867                         if (n < 0)
1868                                 break;
1869
1870                         info = &serverlist_cache[n].info;
1871                         strlcpy(info->game, "Quake", sizeof(info->game));
1872                         strlcpy(info->mod , "", sizeof(info->mod)); // mod name is not specified
1873                         strlcpy(info->name, MSG_ReadString(), sizeof(info->name));
1874                         strlcpy(info->map , MSG_ReadString(), sizeof(info->map));
1875                         info->numplayers = MSG_ReadByte();
1876                         info->maxplayers = MSG_ReadByte();
1877                         info->protocol = MSG_ReadByte();
1878
1879                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1880
1881                         break;
1882                 case CCREP_RCON: // RocketGuy: ProQuake rcon support
1883                         if (developer.integer >= 10)
1884                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RCON from %s.\n", addressstring2);
1885
1886                         Con_Printf("%s\n", MSG_ReadString());
1887                         break;
1888                 case CCREP_PLAYER_INFO:
1889                         // we got a CCREP_PLAYER_INFO??
1890                         //if (developer.integer >= 10)
1891                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
1892                         break;
1893                 case CCREP_RULE_INFO:
1894                         // we got a CCREP_RULE_INFO??
1895                         //if (developer.integer >= 10)
1896                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
1897                         break;
1898                 default:
1899                         break;
1900                 }
1901                 SZ_Clear(&net_message);
1902                 // we may not have liked the packet, but it was a valid control
1903                 // packet, so we're done processing this packet now
1904                 return true;
1905         }
1906         ret = 0;
1907         if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
1908                 CL_ParseServerMessage();
1909         return ret;
1910 }
1911
1912 void NetConn_QueryQueueFrame(void)
1913 {
1914         int index;
1915         int queries;
1916         int maxqueries;
1917         double timeouttime;
1918         static double querycounter = 0;
1919
1920         if(!net_slist_pause.integer && serverlist_paused)
1921                 ServerList_RebuildViewList();
1922         serverlist_paused = net_slist_pause.integer != 0;
1923
1924         if (serverlist_querysleep)
1925                 return;
1926
1927         // apply a cool down time after master server replies,
1928         // to avoid messing up the ping times on the servers
1929         if (serverlist_querywaittime > realtime)
1930                 return;
1931
1932         // each time querycounter reaches 1.0 issue a query
1933         querycounter += cl.realframetime * net_slist_queriespersecond.value;
1934         maxqueries = (int)querycounter;
1935         maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer);
1936         querycounter -= maxqueries;
1937
1938         if( maxqueries == 0 ) {
1939                 return;
1940         }
1941
1942         //      scan serverlist and issue queries as needed
1943         serverlist_querysleep = true;
1944
1945         timeouttime     = realtime - net_slist_timeout.value;
1946         for( index = 0, queries = 0 ;   index   < serverlist_cachecount &&      queries < maxqueries    ; index++ )
1947         {
1948                 serverlist_entry_t *entry = &serverlist_cache[ index ];
1949                 if( entry->query != SQS_QUERYING && entry->query != SQS_REFRESHING )
1950                 {
1951                         continue;
1952                 }
1953
1954                 serverlist_querysleep   = false;
1955                 if( entry->querycounter !=      0 && entry->querytime > timeouttime     )
1956                 {
1957                         continue;
1958                 }
1959
1960                 if( entry->querycounter !=      (unsigned) net_slist_maxtries.integer )
1961                 {
1962                         lhnetaddress_t  address;
1963                         int socket;
1964
1965                         LHNETADDRESS_FromString(&address, entry->info.cname, 0);
1966                         if      (entry->protocol == PROTOCOL_QUAKEWORLD)
1967                         {
1968                                 for (socket     = 0; socket     < cl_numsockets ;       socket++)
1969                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address);
1970                         }
1971                         else
1972                         {
1973                                 for (socket     = 0; socket     < cl_numsockets ;       socket++)
1974                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getstatus", &address);
1975                         }
1976
1977                         //      update the entry fields
1978                         entry->querytime = realtime;
1979                         entry->querycounter++;
1980
1981                         // if not in the slist menu we should print the server to console
1982                         if (serverlist_consoleoutput)
1983                                 Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter);
1984
1985                         queries++;
1986                 }
1987                 else
1988                 {
1989                         // have we tried to refresh this server?
1990                         if( entry->query == SQS_REFRESHING ) {
1991                                 // yes, so update the reply count (since its not responding anymore)
1992                                 serverreplycount--;
1993                                 if(!serverlist_paused)
1994                                         ServerList_ViewList_Remove(entry);
1995                         }
1996                         entry->query = SQS_TIMEDOUT;
1997                 }
1998         }
1999 }
2000
2001 void NetConn_ClientFrame(void)
2002 {
2003         int i, length;
2004         lhnetaddress_t peeraddress;
2005         NetConn_UpdateSockets();
2006         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
2007         {
2008                 if (cls.connect_remainingtries == 0)
2009                         M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
2010                 cls.connect_nextsendtime = realtime + 1;
2011                 cls.connect_remainingtries--;
2012                 if (cls.connect_remainingtries <= -10)
2013                 {
2014                         cls.connect_trying = false;
2015                         M_Update_Return_Reason("Connect: Failed");
2016                         return;
2017                 }
2018                 // try challenge first (newer DP server or QW)
2019                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
2020                 // then try netquake as a fallback (old server, or netquake)
2021                 SZ_Clear(&net_message);
2022                 // save space for the header, filled in later
2023                 MSG_WriteLong(&net_message, 0);
2024                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
2025                 MSG_WriteString(&net_message, "QUAKE");
2026                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2027                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2028                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
2029                 SZ_Clear(&net_message);
2030         }
2031         for (i = 0;i < cl_numsockets;i++)
2032                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2033                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
2034         NetConn_QueryQueueFrame();
2035         if (cls.netcon && realtime > cls.netcon->timeout && !sv.active)
2036         {
2037                 Con_Print("Connection timed out\n");
2038                 CL_Disconnect();
2039                 Host_ShutdownServer ();
2040         }
2041 }
2042
2043 #define MAX_CHALLENGES 128
2044 struct challenge_s
2045 {
2046         lhnetaddress_t address;
2047         double time;
2048         char string[12];
2049 }
2050 challenge[MAX_CHALLENGES];
2051
2052 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
2053 {
2054         int i;
2055         char c;
2056         for (i = 0;i < bufferlength - 1;i++)
2057         {
2058                 do
2059                 {
2060                         c = rand () % (127 - 33) + 33;
2061                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
2062                 buffer[i] = c;
2063         }
2064         buffer[i] = 0;
2065 }
2066
2067 /// (div0) build the full response only if possible; better a getinfo response than no response at all if getstatus won't fit
2068 static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus)
2069 {
2070         char qcstatus[256];
2071         unsigned int nb_clients = 0, nb_bots = 0, i;
2072         int length;
2073         char teambuf[3];
2074
2075         SV_VM_Begin();
2076
2077         // How many clients are there?
2078         for (i = 0;i < (unsigned int)svs.maxclients;i++)
2079         {
2080                 if (svs.clients[i].active)
2081                 {
2082                         nb_clients++;
2083                         if (!svs.clients[i].netconnection)
2084                                 nb_bots++;
2085                 }
2086         }
2087
2088         *qcstatus = 0;
2089         if(prog->globaloffsets.worldstatus >= 0)
2090         {
2091                 const char *str = PRVM_G_STRING(prog->globaloffsets.worldstatus);
2092                 if(str && *str)
2093                 {
2094                         char *p;
2095                         const char *q;
2096                         p = qcstatus;
2097                         for(q = str; *q; ++q)
2098                                 if(*q != '\\' && *q != '\n')
2099                                         *p++ = *q;
2100                         *p = 0;
2101                 }
2102         }
2103
2104         /// \TODO: we should add more information for the full status string
2105         length = dpsnprintf(out_msg, out_size,
2106                                                 "\377\377\377\377%s\x0A"
2107                                                 "\\gamename\\%s\\modname\\%s\\gameversion\\%d\\sv_maxclients\\%d"
2108                                                 "\\clients\\%d\\bots\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d"
2109                                                 "%s%s"
2110                                                 "%s%s"
2111                                                 "%s",
2112                                                 fullstatus ? "statusResponse" : "infoResponse",
2113                                                 gamename, com_modname, gameversion.integer, svs.maxclients,
2114                                                 nb_clients, nb_bots, sv.name, hostname.string, NET_PROTOCOL_VERSION,
2115                                                 *qcstatus ? "\\qcstatus\\" : "", qcstatus,
2116                                                 challenge ? "\\challenge\\" : "", challenge ? challenge : "",
2117                                                 fullstatus ? "\n" : "");
2118
2119         // Make sure it fits in the buffer
2120         if (length < 0)
2121                 goto bad;
2122
2123         if (fullstatus)
2124         {
2125                 char *ptr;
2126                 int left;
2127                 int savelength;
2128
2129                 savelength = length;
2130
2131                 ptr = out_msg + length;
2132                 left = (int)out_size - length;
2133
2134                 for (i = 0;i < (unsigned int)svs.maxclients;i++)
2135                 {
2136                         client_t *cl = &svs.clients[i];
2137                         if (cl->active)
2138                         {
2139                                 int nameind, cleanind, pingvalue;
2140                                 char curchar;
2141                                 char cleanname [sizeof(cl->name)];
2142
2143                                 // Remove all characters '"' and '\' in the player name
2144                                 nameind = 0;
2145                                 cleanind = 0;
2146                                 do
2147                                 {
2148                                         curchar = cl->name[nameind++];
2149                                         if (curchar != '"' && curchar != '\\')
2150                                         {
2151                                                 cleanname[cleanind++] = curchar;
2152                                                 if (cleanind == sizeof(cleanname) - 1)
2153                                                         break;
2154                                         }
2155                                 } while (curchar != '\0');
2156                                 cleanname[cleanind] = 0; // cleanind is always a valid index even at this point
2157
2158                                 pingvalue = (int)(cl->ping * 1000.0f);
2159                                 if(cl->netconnection)
2160                                         pingvalue = bound(1, pingvalue, 9999);
2161                                 else
2162                                         pingvalue = 0;
2163
2164                                 *qcstatus = 0;
2165                                 if(prog->fieldoffsets.clientstatus >= 0)
2166                                 {
2167                                         const char *str = PRVM_E_STRING(PRVM_EDICT_NUM(i + 1), prog->fieldoffsets.clientstatus);
2168                                         if(str && *str)
2169                                         {
2170                                                 char *p;
2171                                                 const char *q;
2172                                                 p = qcstatus;
2173                                                 for(q = str; *q && p != qcstatus + sizeof(qcstatus) - 1; ++q)
2174                                                         if(*q != '\\' && *q != '"' && !ISWHITESPACE(*q))
2175                                                                 *p++ = *q;
2176                                                 *p = 0;
2177                                         }
2178                                 }
2179
2180                                 if ((gamemode == GAME_NEXUIZ) && (teamplay.integer > 0))
2181                                 {
2182                                         if(cl->frags == -666) // spectator
2183                                                 strlcpy(teambuf, " 0", sizeof(teambuf));
2184                                         else if(cl->colors == 0x44) // red team
2185                                                 strlcpy(teambuf, " 1", sizeof(teambuf));
2186                                         else if(cl->colors == 0xDD) // blue team
2187                                                 strlcpy(teambuf, " 2", sizeof(teambuf));
2188                                         else if(cl->colors == 0xCC) // yellow team
2189                                                 strlcpy(teambuf, " 3", sizeof(teambuf));
2190                                         else if(cl->colors == 0x99) // pink team
2191                                                 strlcpy(teambuf, " 4", sizeof(teambuf));
2192                                         else
2193                                                 strlcpy(teambuf, " 0", sizeof(teambuf));
2194                                 }
2195                                 else
2196                                         *teambuf = 0;
2197
2198                                 // note: team number is inserted according to SoF2 protocol
2199                                 if(*qcstatus)
2200                                         length = dpsnprintf(ptr, left, "%s %d%s \"%s\"\n",
2201                                                                                 qcstatus,
2202                                                                                 pingvalue,
2203                                                                                 teambuf,
2204                                                                                 cleanname);
2205                                 else
2206                                         length = dpsnprintf(ptr, left, "%d %d%s \"%s\"\n",
2207                                                                                 cl->frags,
2208                                                                                 pingvalue,
2209                                                                                 teambuf,
2210                                                                                 cleanname);
2211
2212                                 if(length < 0)
2213                                 {
2214                                         // out of space?
2215                                         // turn it into an infoResponse!
2216                                         out_msg[savelength] = 0;
2217                                         memcpy(out_msg + 4, "infoResponse\x0A", 13);
2218                                         memmove(out_msg + 17, out_msg + 19, savelength - 19);
2219                                         break;
2220                                 }
2221                                 left -= length;
2222                                 ptr += length;
2223                         }
2224                 }
2225         }
2226
2227         SV_VM_End();
2228         return true;
2229
2230 bad:
2231         SV_VM_End();
2232         return false;
2233 }
2234
2235 static qboolean NetConn_PreventConnectFlood(lhnetaddress_t *peeraddress)
2236 {
2237         int floodslotnum, bestfloodslotnum;
2238         double bestfloodtime;
2239         lhnetaddress_t noportpeeraddress;
2240         // see if this is a connect flood
2241         noportpeeraddress = *peeraddress;
2242         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
2243         bestfloodslotnum = 0;
2244         bestfloodtime = sv.connectfloodaddresses[bestfloodslotnum].lasttime;
2245         for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++)
2246         {
2247                 if (bestfloodtime >= sv.connectfloodaddresses[floodslotnum].lasttime)
2248                 {
2249                         bestfloodtime = sv.connectfloodaddresses[floodslotnum].lasttime;
2250                         bestfloodslotnum = floodslotnum;
2251                 }
2252                 if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0)
2253                 {
2254                         // this address matches an ongoing flood address
2255                         if (realtime < sv.connectfloodaddresses[floodslotnum].lasttime + net_connectfloodblockingtimeout.value)
2256                         {
2257                                 // renew the ban on this address so it does not expire
2258                                 // until the flood has subsided
2259                                 sv.connectfloodaddresses[floodslotnum].lasttime = realtime;
2260                                 //Con_Printf("Flood detected!\n");
2261                                 return true;
2262                         }
2263                         // the flood appears to have subsided, so allow this
2264                         bestfloodslotnum = floodslotnum; // reuse the same slot
2265                         break;
2266                 }
2267         }
2268         // begin a new timeout on this address
2269         sv.connectfloodaddresses[bestfloodslotnum].address = noportpeeraddress;
2270         sv.connectfloodaddresses[bestfloodslotnum].lasttime = realtime;
2271         //Con_Printf("Flood detection initiated!\n");
2272         return false;
2273 }
2274
2275 void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress)
2276 {
2277         int floodslotnum;
2278         lhnetaddress_t noportpeeraddress;
2279         // see if this is a connect flood
2280         noportpeeraddress = *peeraddress;
2281         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
2282         for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++)
2283         {
2284                 if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0)
2285                 {
2286                         // this address matches an ongoing flood address
2287                         // remove the ban
2288                         sv.connectfloodaddresses[floodslotnum].address.addresstype = LHNETADDRESSTYPE_NONE;
2289                         sv.connectfloodaddresses[floodslotnum].lasttime = 0;
2290                         //Con_Printf("Flood cleared!\n");
2291                 }
2292         }
2293 }
2294
2295 typedef qboolean (*rcon_matchfunc_t) (const char *password, const char *hash, const char *s, int slen);
2296
2297 qboolean hmac_mdfour_matching(const char *password, const char *hash, const char *s, int slen)
2298 {
2299         char mdfourbuf[16];
2300         long t1, t2;
2301
2302         t1 = (long) time(NULL);
2303         t2 = strtol(s, NULL, 0);
2304         if(abs(t1 - t2) > rcon_secure_maxdiff.integer)
2305                 return false;
2306
2307         if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, strlen(password)))
2308                 return false;
2309
2310         return !memcmp(mdfourbuf, hash, 16);
2311 }
2312
2313 qboolean plaintext_matching(const char *password, const char *hash, const char *s, int slen)
2314 {
2315         return !strcmp(password, hash);
2316 }
2317
2318 /// returns a string describing the user level, or NULL for auth failure
2319 const char *RCon_Authenticate(const char *password, const char *s, const char *endpos, rcon_matchfunc_t comparator, const char *cs, int cslen)
2320 {
2321         const char *text;
2322         qboolean hasquotes;
2323
2324         if(comparator(rcon_password.string, password, cs, cslen))
2325                 return "rcon";
2326
2327         if(!comparator(rcon_restricted_password.string, password, cs, cslen))
2328                 return NULL;
2329
2330         for(text = s; text != endpos; ++text)
2331                 if((signed char) *text > 0 && ((signed char) *text < (signed char) ' ' || *text == ';'))
2332                         return NULL; // block possible exploits against the parser/alias expansion
2333
2334         while(s != endpos)
2335         {
2336                 size_t l = strlen(s);
2337                 if(l)
2338                 {
2339                         hasquotes = (strchr(s, '"') != NULL);
2340                         // sorry, we can't allow these substrings in wildcard expressions,
2341                         // as they can mess with the argument counts
2342                         text = rcon_restricted_commands.string;
2343                         while(COM_ParseToken_Console(&text))
2344                         {
2345                                 // com_token now contains a pattern to check for...
2346                                 if(strchr(com_token, '*') || strchr(com_token, '?')) // wildcard expression, * can only match a SINGLE argument
2347                                 {
2348                                         if(!hasquotes)
2349                                                 if(matchpattern_with_separator(s, com_token, true, " ", true)) // note how we excluded tab, newline etc. above
2350                                                         goto match;
2351                                 }
2352                                 else if(strchr(com_token, ' ')) // multi-arg expression? must match in whole
2353                                 {
2354                                         if(!strcmp(com_token, s))
2355                                                 goto match;
2356                                 }
2357                                 else // single-arg expression? must match the beginning of the command
2358                                 {
2359                                         if(!strcmp(com_token, s))
2360                                                 goto match;
2361                                         if(!memcmp(va("%s ", com_token), s, strlen(com_token) + 1))
2362                                                 goto match;
2363                                 }
2364                         }
2365                         // if we got here, nothing matched!
2366                         return NULL;
2367                 }
2368 match:
2369                 s += l + 1;
2370         }
2371
2372         return "restricted rcon";
2373 }
2374
2375 void RCon_Execute(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, const char *addressstring2, const char *userlevel, const char *s, const char *endpos)
2376 {
2377         if(userlevel)
2378         {
2379                 // looks like a legitimate rcon command with the correct password
2380                 const char *s_ptr = s;
2381                 Con_Printf("server received %s command from %s: ", userlevel, host_client ? host_client->name : addressstring2);
2382                 while(s_ptr != endpos)
2383                 {
2384                         size_t l = strlen(s_ptr);
2385                         if(l)
2386                                 Con_Printf(" %s;", s_ptr);
2387                         s_ptr += l + 1;
2388                 }
2389                 Con_Printf("\n");
2390
2391                 if (!host_client || !host_client->netconnection || LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2392                         Con_Rcon_Redirect_Init(mysocket, peeraddress);
2393                 while(s != endpos)
2394                 {
2395                         size_t l = strlen(s);
2396                         if(l)
2397                         {
2398                                 client_t *host_client_save = host_client;
2399                                 Cmd_ExecuteString(s, src_command);
2400                                 host_client = host_client_save;
2401                                 // in case it is a command that changes host_client (like restart)
2402                         }
2403                         s += l + 1;
2404                 }
2405                 Con_Rcon_Redirect_End();
2406         }
2407         else
2408         {
2409                 Con_Printf("server denied rcon access to %s\n", host_client ? host_client->name : addressstring2);
2410         }
2411 }
2412
2413 extern void SV_SendServerinfo (client_t *client);
2414 static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
2415 {
2416         int i, ret, clientnum, best;
2417         double besttime;
2418         client_t *client;
2419         char *s, *string, response[1400], addressstring2[128], stringbuf[16384];
2420         qboolean islocal = (LHNETADDRESS_GetAddressType(peeraddress) == LHNETADDRESSTYPE_LOOP);
2421
2422         if (!sv.active)
2423                 return false;
2424
2425         // convert the address to a string incase we need it
2426         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
2427
2428         // see if we can identify the sender as a local player
2429         // (this is necessary for rcon to send a reliable reply if the client is
2430         //  actually on the server, not sending remotely)
2431         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2432                 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
2433                         break;
2434         if (i == svs.maxclients)
2435                 host_client = NULL;
2436
2437         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
2438         {
2439                 // received a command string - strip off the packaging and put it
2440                 // into our string buffer with NULL termination
2441                 data += 4;
2442                 length -= 4;
2443                 length = min(length, (int)sizeof(stringbuf) - 1);
2444                 memcpy(stringbuf, data, length);
2445                 stringbuf[length] = 0;
2446                 string = stringbuf;
2447
2448                 if (developer.integer >= 10)
2449                 {
2450                         Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
2451                         Com_HexDumpToConsole(data, length);
2452                 }
2453
2454                 if (length >= 12 && !memcmp(string, "getchallenge", 12) && (islocal || sv_public.integer > -2))
2455                 {
2456                         for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
2457                         {
2458                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
2459                                         break;
2460                                 if (besttime > challenge[i].time)
2461                                         besttime = challenge[best = i].time;
2462                         }
2463                         // if we did not find an exact match, choose the oldest and
2464                         // update address and string
2465                         if (i == MAX_CHALLENGES)
2466                         {
2467                                 i = best;
2468                                 challenge[i].address = *peeraddress;
2469                                 NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
2470                         }
2471                         challenge[i].time = realtime;
2472                         // send the challenge
2473                         NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
2474                         return true;
2475                 }
2476                 if (length > 8 && !memcmp(string, "connect\\", 8) && (islocal || sv_public.integer > -2))
2477                 {
2478                         string += 7;
2479                         length -= 7;
2480
2481                         if (!(s = SearchInfostring(string, "challenge")))
2482                                 return true;
2483                         // validate the challenge
2484                         for (i = 0;i < MAX_CHALLENGES;i++)
2485                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
2486                                         break;
2487                         // if the challenge is not recognized, drop the packet
2488                         if (i == MAX_CHALLENGES)
2489                                 return true;
2490
2491                         // check engine protocol
2492                         if(!(s = SearchInfostring(string, "protocol")) || strcmp(s, "darkplaces 3"))
2493                         {
2494                                 if (developer.integer >= 10)
2495                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
2496                                 NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
2497                                 return true;
2498                         }
2499
2500                         // see if this is a duplicate connection request or a disconnected
2501                         // client who is rejoining to the same client slot
2502                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2503                         {
2504                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
2505                                 {
2506                                         // this is a known client...
2507                                         if (client->spawned)
2508                                         {
2509                                                 // client crashed and is coming back,
2510                                                 // keep their stuff intact
2511                                                 if (developer.integer >= 10)
2512                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", addressstring2);
2513                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2514                                                 SV_VM_Begin();
2515                                                 SV_SendServerinfo(client);
2516                                                 SV_VM_End();
2517                                         }
2518                                         else
2519                                         {
2520                                                 // client is still trying to connect,
2521                                                 // so we send a duplicate reply
2522                                                 if (developer.integer >= 10)
2523                                                         Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
2524                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2525                                         }
2526                                         return true;
2527                                 }
2528                         }
2529
2530                         if (NetConn_PreventConnectFlood(peeraddress))
2531                                 return true;
2532
2533                         // find an empty client slot for this new client
2534                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2535                         {
2536                                 netconn_t *conn;
2537                                 if (!client->active && (conn = NetConn_Open(mysocket, peeraddress)))
2538                                 {
2539                                         // allocated connection
2540                                         if (developer.integer >= 10)
2541                                                 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
2542                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2543                                         // now set up the client
2544                                         SV_VM_Begin();
2545                                         SV_ConnectClient(clientnum, conn);
2546                                         SV_VM_End();
2547                                         NetConn_Heartbeat(1);
2548                                         return true;
2549                                 }
2550                         }
2551
2552                         // no empty slots found - server is full
2553                         if (developer.integer >= 10)
2554                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
2555                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
2556
2557                         return true;
2558                 }
2559                 if (length >= 7 && !memcmp(string, "getinfo", 7) && (islocal || sv_public.integer > -1))
2560                 {
2561                         const char *challenge = NULL;
2562
2563                         // If there was a challenge in the getinfo message
2564                         if (length > 8 && string[7] == ' ')
2565                                 challenge = string + 8;
2566
2567                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false))
2568                         {
2569                                 if (developer.integer >= 10)
2570                                         Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
2571                                 NetConn_WriteString(mysocket, response, peeraddress);
2572                         }
2573                         return true;
2574                 }
2575                 if (length >= 9 && !memcmp(string, "getstatus", 9) && (islocal || sv_public.integer > -1))
2576                 {
2577                         const char *challenge = NULL;
2578
2579                         // If there was a challenge in the getinfo message
2580                         if (length > 10 && string[9] == ' ')
2581                                 challenge = string + 10;
2582
2583                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true))
2584                         {
2585                                 if (developer.integer >= 10)
2586                                         Con_Printf("Sending reply to client %s - %s\n", addressstring2, response);
2587                                 NetConn_WriteString(mysocket, response, peeraddress);
2588                         }
2589                         return true;
2590                 }
2591                 if (length >= 37 && !memcmp(string, "srcon HMAC-MD4 TIME ", 20))
2592                 {
2593                         char *password = string + 20;
2594                         char *timeval = string + 37;
2595                         char *s = strchr(timeval, ' ');
2596                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
2597                         const char *userlevel;
2598                         if(!s)
2599                                 return true; // invalid packet
2600                         ++s;
2601
2602                         userlevel = RCon_Authenticate(password, s, endpos, hmac_mdfour_matching, timeval, endpos - timeval - 1); // not including the appended \0 into the HMAC
2603                         RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos);
2604                         return true;
2605                 }
2606                 if (length >= 5 && !memcmp(string, "rcon ", 5))
2607                 {
2608                         int i;
2609                         char *s = string + 5;
2610                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
2611                         char password[64];
2612
2613                         if(rcon_secure.integer)
2614                                 return true;
2615
2616                         for (i = 0;!ISWHITESPACE(*s);s++)
2617                                 if (i < (int)sizeof(password) - 1)
2618                                         password[i++] = *s;
2619                         if(ISWHITESPACE(*s) && s != endpos) // skip leading ugly space
2620                                 ++s;
2621                         password[i] = 0;
2622                         if (!ISWHITESPACE(password[0]))
2623                         {
2624                                 const char *userlevel = RCon_Authenticate(password, s, endpos, plaintext_matching, NULL, 0);
2625                                 RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos);
2626                         }
2627                         return true;
2628                 }
2629                 if (!strncmp(string, "ping", 4))
2630                 {
2631                         if (developer.integer >= 10)
2632                                 Con_Printf("Received ping from %s, sending ack\n", addressstring2);
2633                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
2634                         return true;
2635                 }
2636                 if (!strncmp(string, "ack", 3))
2637                         return true;
2638                 // we may not have liked the packet, but it was a command packet, so
2639                 // we're done processing this packet now
2640                 return true;
2641         }
2642         // netquake control packets, supported for compatibility only, and only
2643         // when running game protocols that are normally served via this connection
2644         // protocol
2645         // (this protects more modern protocols against being used for
2646         //  Quake packet flood Denial Of Service attacks)
2647         if (length >= 5 && (i = BigLong(*((int *)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))
2648         {
2649                 int c;
2650                 int protocolnumber;
2651                 const char *protocolname;
2652                 data += 4;
2653                 length -= 4;
2654                 SZ_Clear(&net_message);
2655                 SZ_Write(&net_message, data, length);
2656                 MSG_BeginReading();
2657                 c = MSG_ReadByte();
2658                 switch (c)
2659                 {
2660                 case CCREQ_CONNECT:
2661                         if (developer.integer >= 10)
2662                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
2663                         if(!islocal && sv_public.integer <= -2)
2664                                 break;
2665
2666                         protocolname = MSG_ReadString();
2667                         protocolnumber = MSG_ReadByte();
2668                         if (strcmp(protocolname, "QUAKE") || protocolnumber != NET_PROTOCOL_VERSION)
2669                         {
2670                                 if (developer.integer >= 10)
2671                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
2672                                 SZ_Clear(&net_message);
2673                                 // save space for the header, filled in later
2674                                 MSG_WriteLong(&net_message, 0);
2675                                 MSG_WriteByte(&net_message, CCREP_REJECT);
2676                                 MSG_WriteString(&net_message, "Incompatible version.\n");
2677                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2678                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2679                                 SZ_Clear(&net_message);
2680                                 break;
2681                         }
2682
2683                         // see if this connect request comes from a known client
2684                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2685                         {
2686                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
2687                                 {
2688                                         // this is either a duplicate connection request
2689                                         // or coming back from a timeout
2690                                         // (if so, keep their stuff intact)
2691
2692                                         // send a reply
2693                                         if (developer.integer >= 10)
2694                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
2695                                         SZ_Clear(&net_message);
2696                                         // save space for the header, filled in later
2697                                         MSG_WriteLong(&net_message, 0);
2698                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
2699                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
2700                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2701                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2702                                         SZ_Clear(&net_message);
2703
2704                                         // if client is already spawned, re-send the
2705                                         // serverinfo message as they'll need it to play
2706                                         if (client->spawned)
2707                                         {
2708                                                 SV_VM_Begin();
2709                                                 SV_SendServerinfo(client);
2710                                                 SV_VM_End();
2711                                         }
2712                                         return true;
2713                                 }
2714                         }
2715
2716                         // this is a new client, check for connection flood
2717                         if (NetConn_PreventConnectFlood(peeraddress))
2718                                 break;
2719
2720                         // find a slot for the new client
2721                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2722                         {
2723                                 netconn_t *conn;
2724                                 if (!client->active && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
2725                                 {
2726                                         // connect to the client
2727                                         // everything is allocated, just fill in the details
2728                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
2729                                         if (developer.integer >= 10)
2730                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
2731                                         // send back the info about the server connection
2732                                         SZ_Clear(&net_message);
2733                                         // save space for the header, filled in later
2734                                         MSG_WriteLong(&net_message, 0);
2735                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
2736                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
2737                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2738                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2739                                         SZ_Clear(&net_message);
2740                                         // now set up the client struct
2741                                         SV_VM_Begin();
2742                                         SV_ConnectClient(clientnum, conn);
2743                                         SV_VM_End();
2744                                         NetConn_Heartbeat(1);
2745                                         return true;
2746                                 }
2747                         }
2748
2749                         if (developer.integer >= 10)
2750                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
2751                         // no room; try to let player know
2752                         SZ_Clear(&net_message);
2753                         // save space for the header, filled in later
2754                         MSG_WriteLong(&net_message, 0);
2755                         MSG_WriteByte(&net_message, CCREP_REJECT);
2756                         MSG_WriteString(&net_message, "Server is full.\n");
2757                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2758                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2759                         SZ_Clear(&net_message);
2760                         break;
2761                 case CCREQ_SERVER_INFO:
2762                         if (developer.integer >= 10)
2763                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
2764                         if(!islocal && sv_public.integer <= -1)
2765                                 break;
2766                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
2767                         {
2768                                 int numclients;
2769                                 char myaddressstring[128];
2770                                 if (developer.integer >= 10)
2771                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
2772                                 SZ_Clear(&net_message);
2773                                 // save space for the header, filled in later
2774                                 MSG_WriteLong(&net_message, 0);
2775                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
2776                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), myaddressstring, sizeof(myaddressstring), true);
2777                                 MSG_WriteString(&net_message, myaddressstring);
2778                                 MSG_WriteString(&net_message, hostname.string);
2779                                 MSG_WriteString(&net_message, sv.name);
2780                                 // How many clients are there?
2781                                 for (i = 0, numclients = 0;i < svs.maxclients;i++)
2782                                         if (svs.clients[i].active)
2783                                                 numclients++;
2784                                 MSG_WriteByte(&net_message, numclients);
2785                                 MSG_WriteByte(&net_message, svs.maxclients);
2786                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2787                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2788                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2789                                 SZ_Clear(&net_message);
2790                         }
2791                         break;
2792                 case CCREQ_PLAYER_INFO:
2793                         if (developer.integer >= 10)
2794                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
2795                         if(!islocal && sv_public.integer <= -1)
2796                                 break;
2797                         if (sv.active)
2798                         {
2799                                 int playerNumber, activeNumber, clientNumber;
2800                                 client_t *client;
2801
2802                                 playerNumber = MSG_ReadByte();
2803                                 activeNumber = -1;
2804                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
2805                                         if (client->active && ++activeNumber == playerNumber)
2806                                                 break;
2807                                 if (clientNumber != svs.maxclients)
2808                                 {
2809                                         SZ_Clear(&net_message);
2810                                         // save space for the header, filled in later
2811                                         MSG_WriteLong(&net_message, 0);
2812                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
2813                                         MSG_WriteByte(&net_message, playerNumber);
2814                                         MSG_WriteString(&net_message, client->name);
2815                                         MSG_WriteLong(&net_message, client->colors);
2816                                         MSG_WriteLong(&net_message, client->frags);
2817                                         MSG_WriteLong(&net_message, (int)(realtime - client->connecttime));
2818                                         MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient");
2819                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2820                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2821                                         SZ_Clear(&net_message);
2822                                 }
2823                         }
2824                         break;
2825                 case CCREQ_RULE_INFO:
2826                         if (developer.integer >= 10)
2827                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
2828                         if(!islocal && sv_public.integer <= -1)
2829                                 break;
2830                         if (sv.active)
2831                         {
2832                                 char *prevCvarName;
2833                                 cvar_t *var;
2834
2835                                 // find the search start location
2836                                 prevCvarName = MSG_ReadString();
2837                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
2838
2839                                 // send the response
2840                                 SZ_Clear(&net_message);
2841                                 // save space for the header, filled in later
2842                                 MSG_WriteLong(&net_message, 0);
2843                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
2844                                 if (var)
2845                                 {
2846                                         MSG_WriteString(&net_message, var->name);
2847                                         MSG_WriteString(&net_message, var->string);
2848                                 }
2849                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2850                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2851                                 SZ_Clear(&net_message);
2852                         }
2853                         break;
2854                 default:
2855                         break;
2856                 }
2857                 SZ_Clear(&net_message);
2858                 // we may not have liked the packet, but it was a valid control
2859                 // packet, so we're done processing this packet now
2860                 return true;
2861         }
2862         if (host_client)
2863         {
2864                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol, host_client->spawned ? net_messagetimeout.value : net_connecttimeout.value)) == 2)
2865                 {
2866                         SV_VM_Begin();
2867                         SV_ReadClientMessage();
2868                         SV_VM_End();
2869                         return ret;
2870                 }
2871         }
2872         return 0;
2873 }
2874
2875 void NetConn_ServerFrame(void)
2876 {
2877         int i, length;
2878         lhnetaddress_t peeraddress;
2879         for (i = 0;i < sv_numsockets;i++)
2880                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2881                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
2882         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2883         {
2884                 // never timeout loopback connections
2885                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2886                 {
2887                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
2888                         SV_VM_Begin();
2889                         SV_DropClient(false);
2890                         SV_VM_End();
2891                 }
2892         }
2893 }
2894
2895 void NetConn_SleepMicroseconds(int microseconds)
2896 {
2897         LHNET_SleepUntilPacket_Microseconds(microseconds);
2898 }
2899
2900 void NetConn_QueryMasters(qboolean querydp, qboolean queryqw)
2901 {
2902         int i, j;
2903         int masternum;
2904         lhnetaddress_t masteraddress;
2905         lhnetaddress_t broadcastaddress;
2906         char request[256];
2907
2908         if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
2909                 return;
2910
2911         // 26000 is the default quake server port, servers on other ports will not
2912         // be found
2913         // note this is IPv4-only, I doubt there are IPv6-only LANs out there
2914         LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
2915
2916         if (querydp)
2917         {
2918                 for (i = 0;i < cl_numsockets;i++)
2919                 {
2920                         if (cl_sockets[i])
2921                         {
2922                                 const char *cmdname, *extraoptions;
2923                                 int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]));
2924
2925                                 if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af)
2926                                 {
2927                                         // search LAN for Quake servers
2928                                         SZ_Clear(&net_message);
2929                                         // save space for the header, filled in later
2930                                         MSG_WriteLong(&net_message, 0);
2931                                         MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
2932                                         MSG_WriteString(&net_message, "QUAKE");
2933                                         MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2934                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2935                                         NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress);
2936                                         SZ_Clear(&net_message);
2937
2938                                         // search LAN for DarkPlaces servers
2939                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377getstatus", &broadcastaddress);
2940                                 }
2941
2942                                 // build the getservers message to send to the dpmaster master servers
2943                                 if (LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == LHNETADDRESSTYPE_INET6)
2944                                 {
2945                                         cmdname = "getserversExt";
2946                                         extraoptions = " ipv4 ipv6";  // ask for IPv4 and IPv6 servers
2947                                 }
2948                                 else
2949                                 {
2950                                         cmdname = "getservers";
2951                                         extraoptions = "";
2952                                 }
2953                                 dpsnprintf(request, sizeof(request), "\377\377\377\377%s %s %u empty full%s", cmdname, gamename, NET_PROTOCOL_VERSION, extraoptions);
2954
2955                                 // search internet
2956                                 for (masternum = 0;sv_masters[masternum].name;masternum++)
2957                                 {
2958                                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == af)
2959                                         {
2960                                                 masterquerycount++;
2961                                                 NetConn_WriteString(cl_sockets[i], request, &masteraddress);
2962                                         }
2963                                 }
2964
2965                                 // search favorite servers
2966                                 for(j = 0; j < nFavorites; ++j)
2967                                 {
2968                                         if(LHNETADDRESS_GetAddressType(&favorites[j]) == af)
2969                                         {
2970                                                 if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true))
2971                                                         NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, request, true );
2972                                         }
2973                                 }
2974                         }
2975                 }
2976         }
2977
2978         // only query QuakeWorld servers when the user wants to
2979         if (queryqw)
2980         {
2981                 for (i = 0;i < cl_numsockets;i++)
2982                 {
2983                         if (cl_sockets[i])
2984                         {
2985                                 int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]));
2986
2987                                 if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af)
2988                                 {
2989                                         // search LAN for QuakeWorld servers
2990                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &broadcastaddress);
2991
2992                                         // build the getservers message to send to the qwmaster master servers
2993                                         // note this has no -1 prefix, and the trailing nul byte is sent
2994                                         dpsnprintf(request, sizeof(request), "c\n");
2995                                 }
2996
2997                                 // search internet
2998                                 for (masternum = 0;sv_qwmasters[masternum].name;masternum++)
2999                                 {
3000                                         if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
3001                                         {
3002                                                 if (m_state != m_slist)
3003                                                 {
3004                                                         char lookupstring[128];
3005                                                         LHNETADDRESS_ToString(&masteraddress, lookupstring, sizeof(lookupstring), true);
3006                                                         Con_Printf("Querying master %s (resolved from %s)\n", lookupstring, sv_qwmasters[masternum].string);
3007                                                 }
3008                                                 masterquerycount++;
3009                                                 NetConn_Write(cl_sockets[i], request, (int)strlen(request) + 1, &masteraddress);
3010                                         }
3011                                 }
3012
3013                                 // search favorite servers
3014                                 for(j = 0; j < nFavorites; ++j)
3015                                 {
3016                                         if(LHNETADDRESS_GetAddressType(&favorites[j]) == af)
3017                                         {
3018                                                 if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true))
3019                                                 {
3020                                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &favorites[j]);
3021                                                         NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, request, true );
3022                                                 }
3023                                         }
3024                                 }
3025                         }
3026                 }
3027         }
3028         if (!masterquerycount)
3029         {
3030                 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
3031                 M_Update_Return_Reason("No network");
3032         }
3033 }
3034
3035 void NetConn_Heartbeat(int priority)
3036 {
3037         lhnetaddress_t masteraddress;
3038         int masternum;
3039         lhnetsocket_t *mysocket;
3040
3041         // if it's a state change (client connected), limit next heartbeat to no
3042         // more than 30 sec in the future
3043         if (priority == 1 && nextheartbeattime > realtime + 30.0)
3044                 nextheartbeattime = realtime + 30.0;
3045
3046         // limit heartbeatperiod to 30 to 270 second range,
3047         // lower limit is to avoid abusing master servers with excess traffic,
3048         // upper limit is to avoid timing out on the master server (which uses
3049         // 300 sec timeout)
3050         if (sv_heartbeatperiod.value < 30)
3051                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
3052         if (sv_heartbeatperiod.value > 270)
3053                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
3054
3055         // make advertising optional and don't advertise singleplayer games, and
3056         // only send a heartbeat as often as the admin wants
3057         if (sv.active && sv_public.integer > 0 && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
3058         {
3059                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
3060                 for (masternum = 0;sv_masters[masternum].name;masternum++)
3061                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
3062                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
3063         }
3064 }
3065
3066 static void Net_Heartbeat_f(void)
3067 {
3068         if (sv.active)
3069                 NetConn_Heartbeat(2);
3070         else
3071                 Con_Print("No server running, can not heartbeat to master server.\n");
3072 }
3073
3074 void PrintStats(netconn_t *conn)
3075 {
3076         if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD))
3077                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->outgoing_unreliable_sequence, conn->qw.incoming_sequence);
3078         else
3079                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence);
3080 }
3081
3082 void Net_Stats_f(void)
3083 {
3084         netconn_t *conn;
3085         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
3086         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
3087         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
3088         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
3089         Con_Printf("packetsSent                = %i\n", packetsSent);
3090         Con_Printf("packetsReSent              = %i\n", packetsReSent);
3091         Con_Printf("packetsReceived            = %i\n", packetsReceived);
3092         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
3093         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
3094         Con_Print("connections                =\n");
3095         for (conn = netconn_list;conn;conn = conn->next)
3096                 PrintStats(conn);
3097 }
3098
3099 void Net_Refresh_f(void)
3100 {
3101         if (m_state != m_slist) {
3102                 Con_Print("Sending new requests to master servers\n");
3103                 ServerList_QueryList(false, true, false, true);
3104                 Con_Print("Listening for replies...\n");
3105         } else
3106                 ServerList_QueryList(false, true, false, false);
3107 }
3108
3109 void Net_Slist_f(void)
3110 {
3111         ServerList_ResetMasks();
3112         serverlist_sortbyfield = SLIF_PING;
3113         serverlist_sortflags = 0;
3114     if (m_state != m_slist) {
3115                 Con_Print("Sending requests to master servers\n");
3116                 ServerList_QueryList(true, true, false, true);
3117                 Con_Print("Listening for replies...\n");
3118         } else
3119                 ServerList_QueryList(true, true, false, false);
3120 }
3121
3122 void Net_SlistQW_f(void)
3123 {
3124         ServerList_ResetMasks();
3125         serverlist_sortbyfield = SLIF_PING;
3126         serverlist_sortflags = 0;
3127     if (m_state != m_slist) {
3128                 Con_Print("Sending requests to master servers\n");
3129                 ServerList_QueryList(true, false, true, true);
3130                 serverlist_consoleoutput = true;
3131                 Con_Print("Listening for replies...\n");
3132         } else
3133                 ServerList_QueryList(true, false, true, false);
3134 }
3135
3136 void NetConn_Init(void)
3137 {
3138         int i;
3139         lhnetaddress_t tempaddress;
3140         netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
3141         Cmd_AddCommand("net_stats", Net_Stats_f, "print network statistics");
3142         Cmd_AddCommand("net_slist", Net_Slist_f, "query dp master servers and print all server information");
3143         Cmd_AddCommand("net_slistqw", Net_SlistQW_f, "query qw master servers and print all server information");
3144         Cmd_AddCommand("net_refresh", Net_Refresh_f, "query dp master servers and refresh all server information");
3145         Cmd_AddCommand("heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)");
3146         Cvar_RegisterVariable(&rcon_restricted_password);
3147         Cvar_RegisterVariable(&rcon_restricted_commands);
3148         Cvar_RegisterVariable(&rcon_secure_maxdiff);
3149         Cvar_RegisterVariable(&net_slist_queriespersecond);
3150         Cvar_RegisterVariable(&net_slist_queriesperframe);
3151         Cvar_RegisterVariable(&net_slist_timeout);
3152         Cvar_RegisterVariable(&net_slist_maxtries);
3153         Cvar_RegisterVariable(&net_slist_favorites);
3154         Cvar_RegisterVariable(&net_slist_pause);
3155         Cvar_RegisterVariable(&net_messagetimeout);
3156         Cvar_RegisterVariable(&net_connecttimeout);
3157         Cvar_RegisterVariable(&net_connectfloodblockingtimeout);
3158         Cvar_RegisterVariable(&cl_netlocalping);
3159         Cvar_RegisterVariable(&cl_netpacketloss_send);
3160         Cvar_RegisterVariable(&cl_netpacketloss_receive);
3161         Cvar_RegisterVariable(&hostname);
3162         Cvar_RegisterVariable(&developer_networking);
3163         Cvar_RegisterVariable(&cl_netport);
3164         Cvar_RegisterVariable(&sv_netport);
3165         Cvar_RegisterVariable(&net_address);
3166         Cvar_RegisterVariable(&net_address_ipv6);
3167         Cvar_RegisterVariable(&sv_public);
3168         Cvar_RegisterVariable(&sv_heartbeatperiod);
3169         for (i = 0;sv_masters[i].name;i++)
3170                 Cvar_RegisterVariable(&sv_masters[i]);
3171         Cvar_RegisterVariable(&gameversion);
3172         Cvar_RegisterVariable(&gameversion_min);
3173         Cvar_RegisterVariable(&gameversion_max);
3174 // 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.
3175         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
3176         {
3177                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
3178                 {
3179                         Con_Printf("-ip option used, setting net_address to \"%s\"\n", com_argv[i + 1]);
3180                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
3181                 }
3182                 else
3183                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
3184         }
3185 // 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
3186         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
3187         {
3188                 i = atoi(com_argv[i + 1]);
3189                 if (i >= 0 && i < 65536)
3190                 {
3191                         Con_Printf("-port option used, setting port cvar to %i\n", i);
3192                         Cvar_SetValueQuick(&sv_netport, i);
3193                 }
3194                 else
3195                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
3196         }
3197         cl_numsockets = 0;
3198         sv_numsockets = 0;
3199         net_message.data = net_message_buf;
3200         net_message.maxsize = sizeof(net_message_buf);
3201         net_message.cursize = 0;
3202         LHNET_Init();
3203 }
3204
3205 void NetConn_Shutdown(void)
3206 {
3207         NetConn_CloseClientPorts();
3208         NetConn_CloseServerPorts();
3209         LHNET_Shutdown();
3210 }
3211