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 #define QWMASTER_PORT 27000
  27 #define DPMASTER_PORT 27950
  28
  29 // note this defaults on for dedicated servers, off for listen servers
  30 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"};
  31 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "120", "how often to send heartbeat in seconds (only used if sv_public is 1)"};
  32
  33 static cvar_t sv_masters [] =
  34 {
  35         {CVAR_SAVE, "sv_master1", "", "user-chosen master server 1"},
  36         {CVAR_SAVE, "sv_master2", "", "user-chosen master server 2"},
  37         {CVAR_SAVE, "sv_master3", "", "user-chosen master server 3"},
  38         {CVAR_SAVE, "sv_master4", "", "user-chosen master server 4"},
  39         {0, "sv_masterextra1", "ghdigital.com", "default master server 1 (admin: LordHavoc)"}, // admin: LordHavoc
  40         {0, "sv_masterextra2", "dpmaster.deathmask.net", "default master server 2 (admin: Willis)"}, // admin: Willis
  41         {0, "sv_masterextra3", "excalibur.nvg.ntnu.no", "default master server 3 (admin: tChr)"}, // admin: tChr
  42         {0, NULL, NULL, NULL}
  43 };
  44
  45 static cvar_t sv_qwmasters [] =
  46 {
  47         {CVAR_SAVE, "sv_qwmaster1", "", "user-chosen qwmaster server 1"},
  48         {CVAR_SAVE, "sv_qwmaster2", "", "user-chosen qwmaster server 2"},
  49         {CVAR_SAVE, "sv_qwmaster3", "", "user-chosen qwmaster server 3"},
  50         {CVAR_SAVE, "sv_qwmaster4", "", "user-chosen qwmaster server 4"},
  51         {0, "sv_qwmasterextra1", "192.246.40.37:27000", "id Limbo (admin: id Software)"},
  52         {0, "sv_qwmasterextra2", "192.246.40.37:27002", "id CTF (admin: id Software)"},
  53         {0, "sv_qwmasterextra3", "192.246.40.37:27003", "id TeamFortress (admin: id Software)"},
  54         {0, "sv_qwmasterextra4", "192.246.40.37:27004", "id Miscilaneous (admin: id Software)"},
  55         {0, "sv_qwmasterextra5", "192.246.40.37:27006", "id Deathmatch Only (admin: id Software)"},
  56         {0, "sv_qwmasterextra6", "150.254.66.120:27000", "Poland's master server. (admin: unknown)"},
  57         {0, "sv_qwmasterextra7", "62.112.145.129:27000", "Ocrana master server. (admin: unknown)"},
  58         {0, "sv_qwmasterextra8", "master.edome.net", "edome master server. (admin: unknown)"},
  59         {0, "sv_qwmasterextra9", "qwmaster.barrysworld.com", "barrysworld master server. (admin: unknown)"},
  60         {0, "sv_qwmasterextra10", "qwmaster.ocrana.de:27000", "Ocrana2 master server. (admin: unknown)"},
  61         {0, "sv_qwmasterextra11", "213.221.174.165:27000", "unknown1 master server. (admin: unknown)"},
  62         {0, "sv_qwmasterextra12", "195.74.0.8", "unknown2 master server. (admin: unknown)"},
  63         {0, "sv_qwmasterextra13", "204.182.161.2", "unknown3 master server. (admin: unknown)"},
  64         {0, NULL, NULL, NULL}
  65 };
  66
  67 static double nextheartbeattime = 0;
  68
  69 sizebuf_t net_message;
  70 static unsigned char net_message_buf[NET_MAXMESSAGE];
  71
  72 cvar_t net_messagetimeout = {0, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"};
  73 cvar_t net_connecttimeout = {0, "net_connecttimeout","10", "after requesting a connection, the client must reply within this many seconds or be dropped (cuts down on connect floods)"};
  74 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)"};
  75 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"};
  76 cvar_t developer_networking = {0, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"};
  77
  78 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)"};
  79 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)"};
  80 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)"};
  81 static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20", "how many server information requests to send per second"};
  82 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)"};
  83 static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"};
  84 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)"};
  85
  86 static cvar_t gameversion = {0, "gameversion", "0", "version of game data (mod-specific), when client and server gameversion mismatch in the server browser the server is shown as incompatible"};
  87
  88 /* statistic counters */
  89 static int packetsSent = 0;
  90 static int packetsReSent = 0;
  91 static int packetsReceived = 0;
  92 static int receivedDuplicateCount = 0;
  93 static int droppedDatagrams = 0;
  94
  95 static int unreliableMessagesSent = 0;
  96 static int unreliableMessagesReceived = 0;
  97 static int reliableMessagesSent = 0;
  98 static int reliableMessagesReceived = 0;
  99
 100 double masterquerytime = -1000;
 101 int masterquerycount = 0;
 102 int masterreplycount = 0;
 103 int serverquerycount = 0;
 104 int serverreplycount = 0;
 105
 106 // this is only false if there are still servers left to query
 107 static qboolean serverlist_querysleep = true;
 108 // this is pushed a second or two ahead of realtime whenever a master server
 109 // reply is received, to avoid issuing queries while master replies are still
 110 // flooding in (which would make a mess of the ping times)
 111 static double serverlist_querywaittime = 0;
 112
 113 static unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 114 static unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 115
 116 static int cl_numsockets;
 117 static lhnetsocket_t *cl_sockets[16];
 118 static int sv_numsockets;
 119 static lhnetsocket_t *sv_sockets[16];
 120
 121 netconn_t *netconn_list = NULL;
 122 mempool_t *netconn_mempool = NULL;
 123
 124 cvar_t cl_netport = {0, "cl_port", "0", "forces client to use chosen port number if not 0"};
 125 cvar_t sv_netport = {0, "port", "26000", "server port for players to connect to"};
 126 cvar_t net_address = {0, "net_address", "0.0.0.0", "network address to open ports on"};
 127 //cvar_t net_netaddress_ipv6 = {0, "net_address_ipv6", "[0:0:0:0:0:0:0:0]", "network address to open ipv6 ports on"};
 128
 129 char net_extresponse[NET_EXTRESPONSE_MAX][1400];
 130 int net_extresponse_count = 0;
 131 int net_extresponse_last = 0;
 132
 133 // ServerList interface
 134 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
 135 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
 136
 137 serverlist_infofield_t serverlist_sortbyfield;
 138 qboolean serverlist_sortdescending;
 139
 140 int serverlist_viewcount = 0;
 141 serverlist_entry_t *serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
 142
 143 int serverlist_cachecount;
 144 serverlist_entry_t serverlist_cache[SERVERLIST_TOTALSIZE];
 145
 146 qboolean serverlist_consoleoutput;
 147
 148 // helper function to insert a value into the viewset
 149 // spare entries will be removed
 150 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
 151 {
 152     int i;
 153         if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) {
 154                 i = serverlist_viewcount++;
 155         } else {
 156                 i = SERVERLIST_VIEWLISTSIZE - 1;
 157         }
 158
 159         for( ; i > index ; i-- )
 160                 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
 161
 162         serverlist_viewlist[index] = entry;
 163 }
 164
 165 // we suppose serverlist_viewcount to be valid, ie > 0
 166 static void _ServerList_ViewList_Helper_Remove( int index )
 167 {
 168         serverlist_viewcount--;
 169         for( ; index < serverlist_viewcount ; index++ )
 170                 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
 171 }
 172
 173 // returns true if A should be inserted before B
 174 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
 175 {
 176         int result = 0; // > 0 if for numbers A > B and for text if A < B
 177
 178         switch( serverlist_sortbyfield ) {
 179                 case SLIF_PING:
 180                         result = A->info.ping - B->info.ping;
 181                         break;
 182                 case SLIF_MAXPLAYERS:
 183                         result = A->info.maxplayers - B->info.maxplayers;
 184                         break;
 185                 case SLIF_NUMPLAYERS:
 186                         result = A->info.numplayers - B->info.numplayers;
 187                         break;
 188                 case SLIF_NUMBOTS:
 189                         result = A->info.numbots - B->info.numbots;
 190                         break;
 191                 case SLIF_NUMHUMANS:
 192                         result = A->info.numhumans - B->info.numhumans;
 193                         break;
 194                 case SLIF_PROTOCOL:
 195                         result = A->info.protocol - B->info.protocol;
 196                         break;
 197                 case SLIF_CNAME:
 198                         result = strcmp( B->info.cname, A->info.cname );
 199                         break;
 200                 case SLIF_GAME:
 201                         result = strcmp( B->info.game, A->info.game );
 202                         break;
 203                 case SLIF_MAP:
 204                         result = strcmp( B->info.map, A->info.map );
 205                         break;
 206                 case SLIF_MOD:
 207                         result = strcmp( B->info.mod, A->info.mod );
 208                         break;
 209                 case SLIF_NAME:
 210                         result = strcmp( B->info.name, A->info.name );
 211                         break;
 212                 default:
 213                         Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
 214                         break;
 215         }
 216
 217         if( serverlist_sortdescending )
 218                 return result > 0;
 219         if (result != 0)
 220                 return result < 0;
 221         // if the chosen sort key is identical, sort by index
 222         // (makes this a stable sort, so that later replies from servers won't
 223         //  shuffle the servers around when they have the same ping)
 224         return A < B;
 225 }
 226
 227 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
 228 {
 229         // This should actually be done with some intermediate and end-of-function return
 230         switch( op ) {
 231                 case SLMO_LESS:
 232                         return A < B;
 233                 case SLMO_LESSEQUAL:
 234                         return A <= B;
 235                 case SLMO_EQUAL:
 236                         return A == B;
 237                 case SLMO_GREATER:
 238                         return A > B;
 239                 case SLMO_NOTEQUAL:
 240                         return A != B;
 241                 case SLMO_GREATEREQUAL:
 242                 case SLMO_CONTAINS:
 243                 case SLMO_NOTCONTAIN:
 244                         return A >= B;
 245                 default:
 246                         Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
 247                         return false;
 248         }
 249 }
 250
 251 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
 252 {
 253         int i;
 254         char bufferA[ 256 ], bufferB[ 256 ]; // should be more than enough
 255         for (i = 0;i < (int)sizeof(bufferA)-1 && A[i];i++)
 256                 bufferA[i] = (A[i] >= 'A' && A[i] <= 'Z') ? (A[i] + 'a' - 'A') : A[i];
 257         bufferA[i] = 0;
 258         for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++)
 259                 bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i];
 260         bufferB[i] = 0;
 261
 262         // Same here, also using an intermediate & final return would be more appropriate
 263         // A info B mask
 264         switch( op ) {
 265                 case SLMO_CONTAINS:
 266                         return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool
 267                 case SLMO_NOTCONTAIN:
 268                         return !*bufferB || !strstr( bufferA, bufferB );
 269                 case SLMO_LESS:
 270                         return strcmp( bufferA, bufferB ) < 0;
 271                 case SLMO_LESSEQUAL:
 272                         return strcmp( bufferA, bufferB ) <= 0;
 273                 case SLMO_EQUAL:
 274                         return strcmp( bufferA, bufferB ) == 0;
 275                 case SLMO_GREATER:
 276                         return strcmp( bufferA, bufferB ) > 0;
 277                 case SLMO_NOTEQUAL:
 278                         return strcmp( bufferA, bufferB ) != 0;
 279                 case SLMO_GREATEREQUAL:
 280                         return strcmp( bufferA, bufferB ) >= 0;
 281                 default:
 282                         Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
 283                         return false;
 284         }
 285 }
 286
 287 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
 288 {
 289         if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
 290                 return false;
 291         if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
 292                 return false;
 293         if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
 294                 return false;
 295         if( !_ServerList_CompareInt( info->numbots, mask->tests[SLIF_NUMBOTS], mask->info.numbots ) )
 296                 return false;
 297         if( !_ServerList_CompareInt( info->numhumans, mask->tests[SLIF_NUMHUMANS], mask->info.numhumans ) )
 298                 return false;
 299         if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
 300                 return false;
 301         if( *mask->info.cname
 302                 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
 303                 return false;
 304         if( *mask->info.game
 305                 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
 306                 return false;
 307         if( *mask->info.mod
 308                 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
 309                 return false;
 310         if( *mask->info.map
 311                 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
 312                 return false;
 313         if( *mask->info.name
 314                 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
 315                 return false;
 316         return true;
 317 }
 318
 319 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
 320 {
 321         int start, end, mid;
 322
 323         // reject incompatible servers
 324         if (entry->info.gameversion != gameversion.integer)
 325                 return;
 326
 327         // FIXME: change this to be more readable (...)
 328         // now check whether it passes through the masks
 329         for( start = 0 ; serverlist_andmasks[start].active && start < SERVERLIST_ANDMASKCOUNT ; start++ )
 330                 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
 331                         return;
 332
 333         for( start = 0 ; serverlist_ormasks[start].active && start < SERVERLIST_ORMASKCOUNT ; start++ )
 334                 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
 335                         break;
 336         if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
 337                 return;
 338
 339         if( !serverlist_viewcount ) {
 340                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 341                 return;
 342         }
 343         // ok, insert it, we just need to find out where exactly:
 344
 345         // two special cases
 346         // check whether to insert it as new first item
 347         if( _ServerList_Entry_Compare( entry, serverlist_viewlist[0] ) ) {
 348                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 349                 return;
 350         } // check whether to insert it as new last item
 351         else if( !_ServerList_Entry_Compare( entry, serverlist_viewlist[serverlist_viewcount - 1] ) ) {
 352                 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
 353                 return;
 354         }
 355         start = 0;
 356         end = serverlist_viewcount - 1;
 357         while( end > start + 1 )
 358         {
 359                 mid = (start + end) / 2;
 360                 // test the item that lies in the middle between start and end
 361                 if( _ServerList_Entry_Compare( entry, serverlist_viewlist[mid] ) )
 362                         // the item has to be in the upper half
 363                         end = mid;
 364                 else
 365                         // the item has to be in the lower half
 366                         start = mid;
 367         }
 368         _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
 369 }
 370
 371 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
 372 {
 373         int i;
 374         for( i = 0; i < serverlist_viewcount; i++ )
 375         {
 376                 if (serverlist_viewlist[i] == entry)
 377                 {
 378                         _ServerList_ViewList_Helper_Remove(i);
 379                         break;
 380                 }
 381         }
 382 }
 383
 384 void ServerList_RebuildViewList(void)
 385 {
 386         int i;
 387
 388         serverlist_viewcount = 0;
 389         for( i = 0 ; i < serverlist_cachecount ; i++ )
 390                 if( serverlist_cache[i].query == SQS_QUERIED )
 391                         ServerList_ViewList_Insert( &serverlist_cache[i] );
 392 }
 393
 394 void ServerList_ResetMasks(void)
 395 {
 396         int i;
 397
 398         memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
 399         memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
 400         // numbots needs to be compared to -1 to always succeed
 401         for(i = 0; i < SERVERLIST_ANDMASKCOUNT; ++i)
 402                 serverlist_andmasks[i].info.numbots = -1;
 403         for(i = 0; i < SERVERLIST_ORMASKCOUNT; ++i)
 404                 serverlist_ormasks[i].info.numbots = -1;
 405 }
 406
 407 #if 0
 408 static void _ServerList_Test(void)
 409 {
 410         int i;
 411         for( i = 0 ; i < 1024 ; i++ ) {
 412                 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) );
 413                 serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i;
 414                 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i );
 415                 serverlist_cache[serverlist_cachecount].finished = true;
 416                 sprintf( serverlist_cache[serverlist_cachecount].line1, "%i %s", serverlist_cache[serverlist_cachecount].info.ping, serverlist_cache[serverlist_cachecount].info.name );
 417                 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
 418                 serverlist_cachecount++;
 419         }
 420 }
 421 #endif
 422
 423 void ServerList_QueryList(qboolean querydp, qboolean queryqw)
 424 {
 425         masterquerytime = realtime;
 426         masterquerycount = 0;
 427         masterreplycount = 0;
 428         serverquerycount = 0;
 429         serverreplycount = 0;
 430         serverlist_cachecount = 0;
 431         serverlist_viewcount = 0;
 432         serverlist_consoleoutput = false;
 433
 434         //_ServerList_Test();
 435
 436         NetConn_QueryMasters(querydp, queryqw);
 437 }
 438
 439 // rest
 440
 441 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
 442 {
 443         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 444         int i;
 445         if (length == 0)
 446                 return 0;
 447         if (cl_netpacketloss_receive.integer)
 448                 for (i = 0;i < cl_numsockets;i++)
 449                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_receive.integer)
 450                                 return 0;
 451         if (developer_networking.integer)
 452         {
 453                 char addressstring[128], addressstring2[128];
 454                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 455                 if (length > 0)
 456                 {
 457                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 458                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
 459                         Com_HexDumpToConsole((unsigned char *)data, length);
 460                 }
 461                 else
 462                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
 463         }
 464         return length;
 465 }
 466
 467 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 468 {
 469         int ret;
 470         int i;
 471         if (cl_netpacketloss_send.integer)
 472                 for (i = 0;i < cl_numsockets;i++)
 473                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_send.integer)
 474                                 return length;
 475         ret = LHNET_Write(mysocket, data, length, peeraddress);
 476         if (developer_networking.integer)
 477         {
 478                 char addressstring[128], addressstring2[128];
 479                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 480                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 481                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 482                 Com_HexDumpToConsole((unsigned char *)data, length);
 483         }
 484         return ret;
 485 }
 486
 487 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 488 {
 489         // note this does not include the trailing NULL because we add that in the parser
 490         return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress);
 491 }
 492
 493 qboolean NetConn_CanSend(netconn_t *conn)
 494 {
 495         conn->outgoing_packetcounter = (conn->outgoing_packetcounter + 1) % NETGRAPH_PACKETS;
 496         conn->outgoing_unreliablesize[conn->outgoing_packetcounter] = NETGRAPH_NOPACKET;
 497         conn->outgoing_reliablesize[conn->outgoing_packetcounter] = NETGRAPH_NOPACKET;
 498         conn->outgoing_acksize[conn->outgoing_packetcounter] = NETGRAPH_NOPACKET;
 499         if (realtime > conn->cleartime)
 500                 return true;
 501         else
 502         {
 503                 conn->outgoing_unreliablesize[conn->outgoing_packetcounter] = NETGRAPH_CHOKEDPACKET;
 504                 return false;
 505         }
 506 }
 507
 508 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol, int rate, qboolean quakesignon_suppressreliables)
 509 {
 510         int totallen = 0;
 511
 512         // if this packet was supposedly choked, but we find ourselves sending one
 513         // anyway, make sure the size counting starts at zero
 514         // (this mostly happens on level changes and disconnects and such)
 515         if (conn->outgoing_unreliablesize[conn->outgoing_packetcounter] == NETGRAPH_CHOKEDPACKET)
 516                 conn->outgoing_unreliablesize[conn->outgoing_packetcounter] = NETGRAPH_NOPACKET;
 517
 518         if (protocol == PROTOCOL_QUAKEWORLD)
 519         {
 520                 int packetLen;
 521                 qboolean sendreliable;
 522
 523                 // note that it is ok to send empty messages to the qw server,
 524                 // otherwise it won't respond to us at all
 525
 526                 sendreliable = false;
 527                 // if the remote side dropped the last reliable message, resend it
 528                 if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence)
 529                         sendreliable = true;
 530                 // if the reliable transmit buffer is empty, copy the current message out
 531                 if (!conn->sendMessageLength && conn->message.cursize)
 532                 {
 533                         memcpy (conn->sendMessage, conn->message.data, conn->message.cursize);
 534                         conn->sendMessageLength = conn->message.cursize;
 535                         SZ_Clear(&conn->message); // clear the message buffer
 536                         conn->qw.reliable_sequence ^= 1;
 537                         sendreliable = true;
 538                 }
 539                 // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1)
 540                 *((int *)(sendbuffer + 0)) = LittleLong((unsigned int)conn->qw.outgoing_sequence | ((unsigned int)sendreliable<<31));
 541                 // last received unreliable packet number, and last received reliable packet number (0 or 1)
 542                 *((int *)(sendbuffer + 4)) = LittleLong((unsigned int)conn->qw.incoming_sequence | ((unsigned int)conn->qw.incoming_reliable_sequence<<31));
 543                 packetLen = 8;
 544                 conn->qw.outgoing_sequence++;
 545                 // client sends qport in every packet
 546                 if (conn == cls.netcon)
 547                 {
 548                         *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport);
 549                         packetLen += 2;
 550                         // also update cls.qw_outgoing_sequence
 551                         cls.qw_outgoing_sequence = conn->qw.outgoing_sequence;
 552                 }
 553                 if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400)
 554                 {
 555                         Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize);
 556                         return -1;
 557                 }
 558
 559                 conn->outgoing_unreliablesize[conn->outgoing_packetcounter] += packetLen;
 560
 561                 // add the reliable message if there is one
 562                 if (sendreliable)
 563                 {
 564                         conn->outgoing_reliablesize[conn->outgoing_packetcounter] += conn->sendMessageLength;
 565                         memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength);
 566                         packetLen += conn->sendMessageLength;
 567                         conn->qw.last_reliable_sequence = conn->qw.outgoing_sequence;
 568                 }
 569
 570                 // add the unreliable message if possible
 571                 if (packetLen + data->cursize <= 1400)
 572                 {
 573                         conn->outgoing_unreliablesize[conn->outgoing_packetcounter] += data->cursize;
 574                         memcpy(sendbuffer + packetLen, data->data, data->cursize);
 575                         packetLen += data->cursize;
 576                 }
 577
 578                 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 579
 580                 packetsSent++;
 581                 unreliableMessagesSent++;
 582
 583                 totallen += packetLen + 28;
 584         }
 585         else
 586         {
 587                 unsigned int packetLen;
 588                 unsigned int dataLen;
 589                 unsigned int eom;
 590                 unsigned int *header;
 591
 592                 // if a reliable message fragment has been lost, send it again
 593                 if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0)
 594                 {
 595                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 596                         {
 597                                 dataLen = conn->sendMessageLength;
 598                                 eom = NETFLAG_EOM;
 599                         }
 600                         else
 601                         {
 602                                 dataLen = MAX_PACKETFRAGMENT;
 603                                 eom = 0;
 604                         }
 605
 606                         packetLen = NET_HEADERSIZE + dataLen;
 607
 608                         header = (unsigned int *)sendbuffer;
 609                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 610                         header[1] = BigLong(conn->nq.sendSequence - 1);
 611                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 612
 613                         conn->outgoing_reliablesize[conn->outgoing_packetcounter] += packetLen;
 614
 615                         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
 616                         {
 617                                 conn->lastSendTime = realtime;
 618                                 packetsReSent++;
 619                         }
 620
 621                         totallen += packetLen + 28;
 622                 }
 623
 624                 // if we have a new reliable message to send, do so
 625                 if (!conn->sendMessageLength && conn->message.cursize && !quakesignon_suppressreliables)
 626                 {
 627                         if (conn->message.cursize > (int)sizeof(conn->sendMessage))
 628                         {
 629                                 Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, (int)sizeof(conn->sendMessage));
 630                                 conn->message.overflowed = true;
 631                                 return -1;
 632                         }
 633
 634                         if (developer_networking.integer && conn == cls.netcon)
 635                         {
 636                                 Con_Print("client sending reliable message to server:\n");
 637                                 SZ_HexDumpToConsole(&conn->message);
 638                         }
 639
 640                         memcpy(conn->sendMessage, conn->message.data, conn->message.cursize);
 641                         conn->sendMessageLength = conn->message.cursize;
 642                         SZ_Clear(&conn->message);
 643
 644                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 645                         {
 646                                 dataLen = conn->sendMessageLength;
 647                                 eom = NETFLAG_EOM;
 648                         }
 649                         else
 650                         {
 651                                 dataLen = MAX_PACKETFRAGMENT;
 652                                 eom = 0;
 653                         }
 654
 655                         packetLen = NET_HEADERSIZE + dataLen;
 656
 657                         header = (unsigned int *)sendbuffer;
 658                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 659                         header[1] = BigLong(conn->nq.sendSequence);
 660                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 661
 662                         conn->nq.sendSequence++;
 663
 664                         conn->outgoing_reliablesize[conn->outgoing_packetcounter] += packetLen;
 665
 666                         NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 667
 668                         conn->lastSendTime = realtime;
 669                         packetsSent++;
 670                         reliableMessagesSent++;
 671
 672                         totallen += packetLen + 28;
 673                 }
 674
 675                 // if we have an unreliable message to send, do so
 676                 if (data->cursize)
 677                 {
 678                         packetLen = NET_HEADERSIZE + data->cursize;
 679
 680                         if (packetLen > (int)sizeof(sendbuffer))
 681                         {
 682                                 Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize);
 683                                 return -1;
 684                         }
 685
 686                         header = (unsigned int *)sendbuffer;
 687                         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
 688                         header[1] = BigLong(conn->nq.unreliableSendSequence);
 689                         memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
 690
 691                         conn->nq.unreliableSendSequence++;
 692
 693                         conn->outgoing_unreliablesize[conn->outgoing_packetcounter] += packetLen;
 694
 695                         NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 696
 697                         packetsSent++;
 698                         unreliableMessagesSent++;
 699
 700                         totallen += packetLen + 28;
 701                 }
 702         }
 703
 704         // delay later packets to obey rate limit
 705         if (conn->cleartime < realtime - 0.1)
 706                 conn->cleartime = realtime - 0.1;
 707         conn->cleartime = conn->cleartime + (double)totallen / (double)rate;
 708         if (conn->cleartime < realtime)
 709                 conn->cleartime = realtime;
 710
 711         return 0;
 712 }
 713
 714 qboolean NetConn_HaveClientPorts(void)
 715 {
 716         return !!cl_numsockets;
 717 }
 718
 719 qboolean NetConn_HaveServerPorts(void)
 720 {
 721         return !!sv_numsockets;
 722 }
 723
 724 void NetConn_CloseClientPorts(void)
 725 {
 726         for (;cl_numsockets > 0;cl_numsockets--)
 727                 if (cl_sockets[cl_numsockets - 1])
 728                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 729 }
 730
 731 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
 732 {
 733         lhnetaddress_t address;
 734         lhnetsocket_t *s;
 735         char addressstring2[1024];
 736         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 737         {
 738                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 739                 {
 740                         cl_sockets[cl_numsockets++] = s;
 741                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 742                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
 743                 }
 744                 else
 745                 {
 746                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 747                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 748                 }
 749         }
 750         else
 751                 Con_Printf("Client unable to parse address %s\n", addressstring);
 752 }
 753
 754 void NetConn_OpenClientPorts(void)
 755 {
 756         int port;
 757         NetConn_CloseClientPorts();
 758         port = bound(0, cl_netport.integer, 65535);
 759         if (cl_netport.integer != port)
 760                 Cvar_SetValueQuick(&cl_netport, port);
 761         Con_Printf("Client using port %i\n", port);
 762         NetConn_OpenClientPort("local:2", 0);
 763         NetConn_OpenClientPort(net_address.string, port);
 764         //NetConn_OpenClientPort(net_address_ipv6.string, port);
 765 }
 766
 767 void NetConn_CloseServerPorts(void)
 768 {
 769         for (;sv_numsockets > 0;sv_numsockets--)
 770                 if (sv_sockets[sv_numsockets - 1])
 771                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 772 }
 773
 774 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
 775 {
 776         lhnetaddress_t address;
 777         lhnetsocket_t *s;
 778         int port;
 779         char addressstring2[1024];
 780
 781         for (port = defaultport; port <= defaultport + 100; port++)
 782         {
 783                 if (LHNETADDRESS_FromString(&address, addressstring, port))
 784                 {
 785                         if ((s = LHNET_OpenSocket_Connectionless(&address)))
 786                         {
 787                                 sv_sockets[sv_numsockets++] = s;
 788                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 789                                 Con_Printf("Server listening on address %s\n", addressstring2);
 790                                 break;
 791                         }
 792                         else
 793                         {
 794                                 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 795                                 Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 796                         }
 797                 }
 798                 else
 799                 {
 800                         Con_Printf("Server unable to parse address %s\n", addressstring);
 801                         // if it cant parse one address, it wont be able to parse another for sure
 802                         break;
 803                 }
 804         }
 805 }
 806
 807 void NetConn_OpenServerPorts(int opennetports)
 808 {
 809         int port;
 810         NetConn_CloseServerPorts();
 811         NetConn_UpdateSockets();
 812         port = bound(0, sv_netport.integer, 65535);
 813         if (port == 0)
 814                 port = 26000;
 815         Con_Printf("Server using port %i\n", port);
 816         if (sv_netport.integer != port)
 817                 Cvar_SetValueQuick(&sv_netport, port);
 818         if (cls.state != ca_dedicated)
 819                 NetConn_OpenServerPort("local:1", 0);
 820         if (opennetports)
 821         {
 822                 NetConn_OpenServerPort(net_address.string, port);
 823                 //NetConn_OpenServerPort(net_address_ipv6.string, port);
 824         }
 825         if (sv_numsockets == 0)
 826                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!");
 827 }
 828
 829 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
 830 {
 831         int i, a = LHNETADDRESS_GetAddressType(address);
 832         for (i = 0;i < cl_numsockets;i++)
 833                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
 834                         return cl_sockets[i];
 835         return NULL;
 836 }
 837
 838 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
 839 {
 840         int i, a = LHNETADDRESS_GetAddressType(address);
 841         for (i = 0;i < sv_numsockets;i++)
 842                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
 843                         return sv_sockets[i];
 844         return NULL;
 845 }
 846
 847 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 848 {
 849         netconn_t *conn;
 850         conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn));
 851         conn->mysocket = mysocket;
 852         conn->peeraddress = *peeraddress;
 853         conn->lastMessageTime = realtime;
 854         conn->message.data = conn->messagedata;
 855         conn->message.maxsize = sizeof(conn->messagedata);
 856         conn->message.cursize = 0;
 857         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
 858         // reduce effectiveness of connection request floods
 859         conn->timeout = realtime + net_connecttimeout.value;
 860         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
 861         conn->next = netconn_list;
 862         netconn_list = conn;
 863         return conn;
 864 }
 865
 866 void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress);
 867 void NetConn_Close(netconn_t *conn)
 868 {
 869         netconn_t *c;
 870         // remove connection from list
 871
 872         // allow the client to reconnect immediately
 873         NetConn_ClearConnectFlood(&(conn->peeraddress));
 874
 875         if (conn == netconn_list)
 876                 netconn_list = conn->next;
 877         else
 878         {
 879                 for (c = netconn_list;c;c = c->next)
 880                 {
 881                         if (c->next == conn)
 882                         {
 883                                 c->next = conn->next;
 884                                 break;
 885                         }
 886                 }
 887                 // not found in list, we'll avoid crashing here...
 888                 if (!c)
 889                         return;
 890         }
 891         // free connection
 892         Mem_Free(conn);
 893 }
 894
 895 static int clientport = -1;
 896 static int clientport2 = -1;
 897 static int hostport = -1;
 898 void NetConn_UpdateSockets(void)
 899 {
 900         if (cls.state != ca_dedicated)
 901         {
 902                 if (clientport2 != cl_netport.integer)
 903                 {
 904                         clientport2 = cl_netport.integer;
 905                         if (cls.state == ca_connected)
 906                                 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
 907                 }
 908                 if (cls.state == ca_disconnected && clientport != clientport2)
 909                 {
 910                         clientport = clientport2;
 911                         NetConn_CloseClientPorts();
 912                 }
 913                 if (cl_numsockets == 0)
 914                         NetConn_OpenClientPorts();
 915         }
 916
 917         if (hostport != sv_netport.integer)
 918         {
 919                 hostport = sv_netport.integer;
 920                 if (sv.active)
 921                         Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
 922         }
 923 }
 924
 925 static int NetConn_ReceivedMessage(netconn_t *conn, unsigned char *data, int length, protocolversion_t protocol, double newtimeout)
 926 {
 927         int originallength = length;
 928         if (length < 8)
 929                 return 0;
 930
 931         if (protocol == PROTOCOL_QUAKEWORLD)
 932         {
 933                 int sequence, sequence_ack;
 934                 int reliable_ack, reliable_message;
 935                 int count;
 936                 int qport;
 937
 938                 sequence = LittleLong(*((int *)(data + 0)));
 939                 sequence_ack = LittleLong(*((int *)(data + 4)));
 940                 data += 8;
 941                 length -= 8;
 942
 943                 if (conn != cls.netcon)
 944                 {
 945                         // server only
 946                         if (length < 2)
 947                                 return 0;
 948                         // 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?)
 949                         qport = LittleShort(*((int *)(data + 8)));
 950                         data += 2;
 951                         length -= 2;
 952                 }
 953
 954                 packetsReceived++;
 955                 reliable_message = (sequence >> 31) & 1;
 956                 reliable_ack = (sequence_ack >> 31) & 1;
 957                 sequence &= ~(1<<31);
 958                 sequence_ack &= ~(1<<31);
 959                 if (sequence <= conn->qw.incoming_sequence)
 960                 {
 961                         //Con_DPrint("Got a stale datagram\n");
 962                         return 0;
 963                 }
 964                 count = sequence - (conn->qw.incoming_sequence + 1);
 965                 if (count > 0)
 966                 {
 967                         droppedDatagrams += count;
 968                         //Con_DPrintf("Dropped %u datagram(s)\n", count);
 969                         while (count--)
 970                         {
 971                                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
 972                                 conn->incoming_unreliablesize[conn->incoming_packetcounter] = NETGRAPH_LOSTPACKET;
 973                                 conn->incoming_reliablesize[conn->incoming_packetcounter] = NETGRAPH_NOPACKET;
 974                                 conn->incoming_acksize[conn->incoming_packetcounter] = NETGRAPH_NOPACKET;
 975                         }
 976                 }
 977                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
 978                 conn->incoming_unreliablesize[conn->incoming_packetcounter] = originallength;
 979                 conn->incoming_reliablesize[conn->incoming_packetcounter] = NETGRAPH_NOPACKET;
 980                 conn->incoming_acksize[conn->incoming_packetcounter] = NETGRAPH_NOPACKET;
 981                 if (reliable_ack == conn->qw.reliable_sequence)
 982                 {
 983                         // received, now we will be able to send another reliable message
 984                         conn->sendMessageLength = 0;
 985                         reliableMessagesReceived++;
 986                 }
 987                 conn->qw.incoming_sequence = sequence;
 988                 if (conn == cls.netcon)
 989                         cls.qw_incoming_sequence = conn->qw.incoming_sequence;
 990                 conn->qw.incoming_acknowledged = sequence_ack;
 991                 conn->qw.incoming_reliable_acknowledged = reliable_ack;
 992                 if (reliable_message)
 993                         conn->qw.incoming_reliable_sequence ^= 1;
 994                 conn->lastMessageTime = realtime;
 995                 conn->timeout = realtime + newtimeout;
 996                 unreliableMessagesReceived++;
 997                 SZ_Clear(&net_message);
 998                 SZ_Write(&net_message, data, length);
 999                 MSG_BeginReading();
1000                 return 2;
1001         }
1002         else
1003         {
1004                 unsigned int count;
1005                 unsigned int flags;
1006                 unsigned int sequence;
1007                 int qlength;
1008
1009                 qlength = (unsigned int)BigLong(((int *)data)[0]);
1010                 flags = qlength & ~NETFLAG_LENGTH_MASK;
1011                 qlength &= NETFLAG_LENGTH_MASK;
1012                 // control packets were already handled
1013                 if (!(flags & NETFLAG_CTL) && qlength == length)
1014                 {
1015                         sequence = BigLong(((int *)data)[1]);
1016                         packetsReceived++;
1017                         data += 8;
1018                         length -= 8;
1019                         if (flags & NETFLAG_UNRELIABLE)
1020                         {
1021                                 if (sequence >= conn->nq.unreliableReceiveSequence)
1022                                 {
1023                                         if (sequence > conn->nq.unreliableReceiveSequence)
1024                                         {
1025                                                 count = sequence - conn->nq.unreliableReceiveSequence;
1026                                                 droppedDatagrams += count;
1027                                                 //Con_DPrintf("Dropped %u datagram(s)\n", count);
1028                                                 while (count--)
1029                                                 {
1030                                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1031                                                         conn->incoming_unreliablesize[conn->incoming_packetcounter] = NETGRAPH_LOSTPACKET;
1032                                                         conn->incoming_reliablesize[conn->incoming_packetcounter] = NETGRAPH_NOPACKET;
1033                                                         conn->incoming_acksize[conn->incoming_packetcounter] = NETGRAPH_NOPACKET;
1034                                                 }
1035                                         }
1036                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1037                                         conn->incoming_unreliablesize[conn->incoming_packetcounter] = originallength;
1038                                         conn->incoming_reliablesize[conn->incoming_packetcounter] = NETGRAPH_NOPACKET;
1039                                         conn->incoming_acksize[conn->incoming_packetcounter] = NETGRAPH_NOPACKET;
1040                                         conn->nq.unreliableReceiveSequence = sequence + 1;
1041                                         conn->lastMessageTime = realtime;
1042                                         conn->timeout = realtime + newtimeout;
1043                                         unreliableMessagesReceived++;
1044                                         if (length > 0)
1045                                         {
1046                                                 SZ_Clear(&net_message);
1047                                                 SZ_Write(&net_message, data, length);
1048                                                 MSG_BeginReading();
1049                                                 return 2;
1050                                         }
1051                                 }
1052                                 //else
1053                                 //      Con_DPrint("Got a stale datagram\n");
1054                                 return 1;
1055                         }
1056                         else if (flags & NETFLAG_ACK)
1057                         {
1058                                 conn->incoming_acksize[conn->incoming_packetcounter] += originallength;
1059                                 if (sequence == (conn->nq.sendSequence - 1))
1060                                 {
1061                                         if (sequence == conn->nq.ackSequence)
1062                                         {
1063                                                 conn->nq.ackSequence++;
1064                                                 if (conn->nq.ackSequence != conn->nq.sendSequence)
1065                                                         Con_DPrint("ack sequencing error\n");
1066                                                 conn->lastMessageTime = realtime;
1067                                                 conn->timeout = realtime + newtimeout;
1068                                                 if (conn->sendMessageLength > MAX_PACKETFRAGMENT)
1069                                                 {
1070                                                         unsigned int packetLen;
1071                                                         unsigned int dataLen;
1072                                                         unsigned int eom;
1073                                                         unsigned int *header;
1074
1075                                                         conn->sendMessageLength -= MAX_PACKETFRAGMENT;
1076                                                         memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
1077
1078                                                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
1079                                                         {
1080                                                                 dataLen = conn->sendMessageLength;
1081                                                                 eom = NETFLAG_EOM;
1082                                                         }
1083                                                         else
1084                                                         {
1085                                                                 dataLen = MAX_PACKETFRAGMENT;
1086                                                                 eom = 0;
1087                                                         }
1088
1089                                                         packetLen = NET_HEADERSIZE + dataLen;
1090
1091                                                         header = (unsigned int *)sendbuffer;
1092                                                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
1093                                                         header[1] = BigLong(conn->nq.sendSequence);
1094                                                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
1095
1096                                                         conn->nq.sendSequence++;
1097
1098                                                         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
1099                                                         {
1100                                                                 conn->lastSendTime = realtime;
1101                                                                 packetsSent++;
1102                                                         }
1103                                                 }
1104                                                 else
1105                                                         conn->sendMessageLength = 0;
1106                                         }
1107                                         //else
1108                                         //      Con_DPrint("Duplicate ACK received\n");
1109                                 }
1110                                 //else
1111                                 //      Con_DPrint("Stale ACK received\n");
1112                                 return 1;
1113                         }
1114                         else if (flags & NETFLAG_DATA)
1115                         {
1116                                 unsigned int temppacket[2];
1117                                 conn->incoming_reliablesize[conn->incoming_packetcounter] += originallength;
1118                                 conn->outgoing_acksize[conn->outgoing_packetcounter] += 8;
1119                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
1120                                 temppacket[1] = BigLong(sequence);
1121                                 NetConn_Write(conn->mysocket, (unsigned char *)temppacket, 8, &conn->peeraddress);
1122                                 if (sequence == conn->nq.receiveSequence)
1123                                 {
1124                                         conn->lastMessageTime = realtime;
1125                                         conn->timeout = realtime + newtimeout;
1126                                         conn->nq.receiveSequence++;
1127                                         if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) {
1128                                                 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
1129                                                 conn->receiveMessageLength += length;
1130                                         } else {
1131                                                 Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n"
1132                                                                         "Dropping the message!\n", sequence );
1133                                                 conn->receiveMessageLength = 0;
1134                                                 return 1;
1135                                         }
1136                                         if (flags & NETFLAG_EOM)
1137                                         {
1138                                                 reliableMessagesReceived++;
1139                                                 length = conn->receiveMessageLength;
1140                                                 conn->receiveMessageLength = 0;
1141                                                 if (length > 0)
1142                                                 {
1143                                                         SZ_Clear(&net_message);
1144                                                         SZ_Write(&net_message, conn->receiveMessage, length);
1145                                                         MSG_BeginReading();
1146                                                         return 2;
1147                                                 }
1148                                         }
1149                                 }
1150                                 else
1151                                         receivedDuplicateCount++;
1152                                 return 1;
1153                         }
1154                 }
1155         }
1156         return 0;
1157 }
1158
1159 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol)
1160 {
1161         cls.connect_trying = false;
1162         M_Update_Return_Reason("");
1163         // the connection request succeeded, stop current connection and set up a new connection
1164         CL_Disconnect();
1165         // if we're connecting to a remote server, shut down any local server
1166         if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active)
1167                 Host_ShutdownServer ();
1168         // allocate a net connection to keep track of things
1169         cls.netcon = NetConn_Open(mysocket, peeraddress);
1170         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
1171         key_dest = key_game;
1172         m_state = m_none;
1173         cls.demonum = -1;                       // not in the demo loop now
1174         cls.state = ca_connected;
1175         cls.signon = 0;                         // need all the signon messages before playing
1176         cls.protocol = initialprotocol;
1177         // reset move sequence numbering on this new connection
1178         cls.movesequence = 1;
1179         cls.servermovesequence = 0;
1180         if (cls.protocol == PROTOCOL_QUAKEWORLD)
1181                 Cmd_ForwardStringToServer("new");
1182         if (cls.protocol == PROTOCOL_QUAKE)
1183         {
1184                 // write a keepalive (clc_nop) as it seems to greatly improve the
1185                 // chances of connecting to a netquake server
1186                 sizebuf_t msg;
1187                 unsigned char buf[4];
1188                 memset(&msg, 0, sizeof(msg));
1189                 msg.data = buf;
1190                 msg.maxsize = sizeof(buf);
1191                 MSG_WriteChar(&msg, clc_nop);
1192                 NetConn_SendUnreliableMessage(cls.netcon, &msg, cls.protocol, 10000, false);
1193         }
1194 }
1195
1196 int NetConn_IsLocalGame(void)
1197 {
1198         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
1199                 return true;
1200         return false;
1201 }
1202
1203 static int NetConn_ClientParsePacket_ServerList_ProcessReply(const char *addressstring)
1204 {
1205         int n;
1206         int pingtime;
1207         // search the cache for this server and update it
1208         for (n = 0;n < serverlist_cachecount;n++)
1209                 if (!strcmp(addressstring, serverlist_cache[n].info.cname))
1210                         break;
1211         if (n == serverlist_cachecount)
1212         {
1213                 // LAN search doesnt require an answer from the master server so we wont
1214                 // know the ping nor will it be initialized already...
1215
1216                 // find a slot
1217                 if (serverlist_cachecount == SERVERLIST_TOTALSIZE)
1218                         return -1;
1219
1220                 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1221                 // store the data the engine cares about (address and ping)
1222                 strlcpy(serverlist_cache[serverlist_cachecount].info.cname, addressstring, sizeof(serverlist_cache[serverlist_cachecount].info.cname));
1223                 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1224                 serverlist_cache[serverlist_cachecount].querytime = realtime;
1225                 // if not in the slist menu we should print the server to console
1226                 if (serverlist_consoleoutput)
1227                         Con_Printf("querying %s\n", addressstring);
1228                 ++serverlist_cachecount;
1229         }
1230         // if this is the first reply from this server, count it as having replied
1231         if (serverlist_cache[n].info.ping == 100000)
1232                 serverreplycount++;
1233         pingtime = (int)((realtime - serverlist_cache[n].querytime) * 1000.0 + 0.5);
1234         pingtime = bound(0, pingtime, 9999);
1235         // update the ping
1236         serverlist_cache[n].info.ping = min(serverlist_cache[n].info.ping, pingtime);
1237         // other server info is updated by the caller
1238         return n;
1239 }
1240
1241 static void NetConn_ClientParsePacket_ServerList_UpdateCache(int n)
1242 {
1243         serverlist_info_t *info = &serverlist_cache[n].info;
1244         // update description strings for engine menu and console output
1245         dpsnprintf(serverlist_cache[n].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);
1246         dpsnprintf(serverlist_cache[n].line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s ^%c%-17.17s^4 %-20.20s", info->cname, info->game, (info->gameversion != gameversion.integer) ? '1' : '4', info->mod, info->map);
1247         if (serverlist_cache[n].query == SQS_QUERIED)
1248                 ServerList_ViewList_Remove(&serverlist_cache[n]);
1249         // if not in the slist menu we should print the server to console (if wanted)
1250         else if( serverlist_consoleoutput )
1251                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1252         // and finally, update the view set
1253         ServerList_ViewList_Insert( &serverlist_cache[n] );
1254         serverlist_cache[n].query = SQS_QUERIED;
1255 }
1256
1257 static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1258 {
1259         qboolean fromserver;
1260         int ret, c, control;
1261         const char *s;
1262         char *string, addressstring2[128], ipstring[32];
1263         char stringbuf[16384];
1264
1265         // quakeworld ingame packet
1266         fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress);
1267
1268         // convert the address to a string incase we need it
1269         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1270
1271         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1272         {
1273                 // received a command string - strip off the packaging and put it
1274                 // into our string buffer with NULL termination
1275                 data += 4;
1276                 length -= 4;
1277                 length = min(length, (int)sizeof(stringbuf) - 1);
1278                 memcpy(stringbuf, data, length);
1279                 stringbuf[length] = 0;
1280                 string = stringbuf;
1281
1282                 if (developer_networking.integer)
1283                 {
1284                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
1285                         Com_HexDumpToConsole(data, length);
1286                 }
1287
1288                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
1289                 {
1290                         // darkplaces or quake3
1291                         char protocolnames[1400];
1292                         Protocol_Names(protocolnames, sizeof(protocolnames));
1293                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
1294                         M_Update_Return_Reason("Got challenge response");
1295                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1296                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1297                         // TODO: add userinfo stuff here instead of using NQ commands?
1298                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s\\challenge\\%s", protocolnames, string + 10), peeraddress);
1299                         return true;
1300                 }
1301                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
1302                 {
1303                         // darkplaces or quake3
1304                         M_Update_Return_Reason("Accepted");
1305                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3);
1306                         return true;
1307                 }
1308                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
1309                 {
1310                         char rejectreason[32];
1311                         cls.connect_trying = false;
1312                         string += 7;
1313                         length = max(length - 7, (int)sizeof(rejectreason) - 1);
1314                         memcpy(rejectreason, string, length);
1315                         rejectreason[length] = 0;
1316                         M_Update_Return_Reason(rejectreason);
1317                         return true;
1318                 }
1319                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
1320                 {
1321                         serverlist_info_t *info;
1322                         int n;
1323
1324                         string += 13;
1325                         // search the cache for this server and update it
1326                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1327                         if (n < 0)
1328                                 return true;
1329
1330                         info = &serverlist_cache[n].info;
1331                         info->game[0] = 0;
1332                         info->mod[0]  = 0;
1333                         info->map[0]  = 0;
1334                         info->name[0] = 0;
1335                         info->protocol = -1;
1336                         info->numplayers = 0;
1337                         info->numbots = -1;
1338                         info->maxplayers  = 0;
1339                         info->gameversion = 0;
1340                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(info->game, s, sizeof (info->game));
1341                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
1342                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(info->map , s, sizeof (info->map ));
1343                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));
1344                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) info->protocol = atoi(s);
1345                         if ((s = SearchInfostring(string, "clients"      )) != NULL) info->numplayers = atoi(s);
1346                         if ((s = SearchInfostring(string, "bots"         )) != NULL) info->numbots = atoi(s);
1347                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);
1348                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);
1349                         info->numhumans = info->numplayers - max(0, info->numbots);
1350
1351                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1352
1353                         return true;
1354                 }
1355                 if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1356                 {
1357                         // Extract the IP addresses
1358                         data += 18;
1359                         length -= 18;
1360                         masterreplycount++;
1361                         if (serverlist_consoleoutput)
1362                                 Con_Print("received DarkPlaces server list...\n");
1363                         while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
1364                         {
1365                                 int n;
1366
1367                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], data[5] * 256 + data[6]);
1368                                 if (serverlist_consoleoutput && developer_networking.integer)
1369                                         Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring);
1370                                 // ignore the rest of the message if the serverlist is full
1371                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1372                                         break;
1373                                 // also ignore it if we have already queried it (other master server response)
1374                                 for( n = 0 ; n < serverlist_cachecount ; n++ )
1375                                         if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1376                                                 break;
1377                                 if( n >= serverlist_cachecount )
1378                                 {
1379                                         serverquerycount++;
1380
1381                                         memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1382                                         serverlist_cache[serverlist_cachecount].protocol = PROTOCOL_DARKPLACES7;
1383                                         // store the data the engine cares about (address and ping)
1384                                         strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1385                                         serverlist_cache[serverlist_cachecount].info.ping = 100000;
1386                                         serverlist_cache[serverlist_cachecount].query = SQS_QUERYING;
1387
1388                                         ++serverlist_cachecount;
1389                                 }
1390
1391                                 // move on to next address in packet
1392                                 data += 7;
1393                                 length -= 7;
1394                         }
1395                         // begin or resume serverlist queries
1396                         serverlist_querysleep = false;
1397                         serverlist_querywaittime = realtime + 3;
1398                         return true;
1399                 }
1400                 if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1401                 {
1402                         // Extract the IP addresses
1403                         data += 2;
1404                         length -= 2;
1405                         masterreplycount++;
1406                         if (serverlist_consoleoutput)
1407                                 Con_Printf("received QuakeWorld server list from %s...\n", addressstring2);
1408                         while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0)
1409                         {
1410                                 int n;
1411
1412                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]);
1413                                 if (serverlist_consoleoutput && developer_networking.integer)
1414                                         Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring);
1415                                 // ignore the rest of the message if the serverlist is full
1416                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1417                                         break;
1418                                 // also ignore it if we have already queried it (other master server response)
1419                                 for( n = 0 ; n < serverlist_cachecount ; n++ )
1420                                         if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1421                                                 break;
1422                                 if( n >= serverlist_cachecount )
1423                                 {
1424                                         serverquerycount++;
1425
1426                                         memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1427                                         serverlist_cache[serverlist_cachecount].protocol = PROTOCOL_QUAKEWORLD;
1428                                         // store the data the engine cares about (address and ping)
1429                                         strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1430                                         serverlist_cache[serverlist_cachecount].info.ping = 100000;
1431                                         serverlist_cache[serverlist_cachecount].query = SQS_QUERYING;
1432
1433                                         ++serverlist_cachecount;
1434                                 }
1435
1436                                 // move on to next address in packet
1437                                 data += 6;
1438                                 length -= 6;
1439                         }
1440                         // begin or resume serverlist queries
1441                         serverlist_querysleep = false;
1442                         serverlist_querywaittime = realtime + 3;
1443                         return true;
1444                 }
1445                 if (!strncmp(string, "extResponse ", 12))
1446                 {
1447                         ++net_extresponse_count;
1448                         if(net_extresponse_count > NET_EXTRESPONSE_MAX)
1449                                 net_extresponse_count = NET_EXTRESPONSE_MAX;
1450                         net_extresponse_last = (net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
1451                         dpsnprintf(net_extresponse[net_extresponse_last], sizeof(net_extresponse[net_extresponse_last]), "'%s' %s", addressstring2, string + 12);
1452                         return true;
1453                 }
1454                 if (!strncmp(string, "ping", 4))
1455                 {
1456                         if (developer.integer >= 10)
1457                                 Con_Printf("Received ping from %s, sending ack\n", addressstring2);
1458                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1459                         return true;
1460                 }
1461                 if (!strncmp(string, "ack", 3))
1462                         return true;
1463                 // QuakeWorld compatibility
1464                 if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')) && cls.connect_trying)
1465                 {
1466                         // challenge message
1467                         Con_Printf("challenge %s received, sending QuakeWorld connect request back to %s\n", string + 1, addressstring2);
1468                         M_Update_Return_Reason("Got QuakeWorld challenge response");
1469                         cls.qw_qport = qport.integer;
1470                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1471                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1472                         NetConn_WriteString(mysocket, va("\377\377\377\377connect %i %i %i \"%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo), peeraddress);
1473                         return true;
1474                 }
1475                 if (length >= 1 && string[0] == 'j' && cls.connect_trying)
1476                 {
1477                         // accept message
1478                         M_Update_Return_Reason("QuakeWorld Accepted");
1479                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
1480                         return true;
1481                 }
1482                 if (length > 2 && !memcmp(string, "n\\", 2))
1483                 {
1484                         serverlist_info_t *info;
1485                         int n;
1486
1487                         // qw server status
1488                         if (serverlist_consoleoutput && developer_networking.integer >= 2)
1489                                 Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1);
1490
1491                         string += 1;
1492                         // search the cache for this server and update it
1493                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1494                         if (n < 0)
1495                                 return true;
1496
1497                         info = &serverlist_cache[n].info;
1498                         strlcpy(info->game, "QuakeWorld", sizeof(info->game));;
1499                         if ((s = SearchInfostring(string, "*gamedir"     )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
1500                         if ((s = SearchInfostring(string, "map"          )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
1501                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1502                         info->protocol = 0;
1503                         info->numplayers = 0; // updated below
1504                         if ((s = SearchInfostring(string, "maxclients"   )) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
1505                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
1506
1507                         // count active players on server
1508                         // (we could gather more info, but we're just after the number)
1509                         s = strchr(string, '\n');
1510                         if (s)
1511                         {
1512                                 s++;
1513                                 while (s < string + length)
1514                                 {
1515                                         for (;s < string + length && *s != '\n';s++)
1516                                                 ;
1517                                         if (s >= string + length)
1518                                                 break;
1519                                         info->numplayers++;
1520                                         s++;
1521                                 }
1522                         }
1523
1524                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1525
1526                         return true;
1527                 }
1528                 if (string[0] == 'n')
1529                 {
1530                         // qw print command
1531                         Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1);
1532                 }
1533                 // we may not have liked the packet, but it was a command packet, so
1534                 // we're done processing this packet now
1535                 return true;
1536         }
1537         // quakeworld ingame packet
1538         if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
1539         {
1540                 ret = 0;
1541                 CL_ParseServerMessage();
1542                 return ret;
1543         }
1544         // netquake control packets, supported for compatibility only
1545         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1546         {
1547                 int n;
1548                 serverlist_info_t *info;
1549
1550                 data += 4;
1551                 length -= 4;
1552                 SZ_Clear(&net_message);
1553                 SZ_Write(&net_message, data, length);
1554                 MSG_BeginReading();
1555                 c = MSG_ReadByte();
1556                 switch (c)
1557                 {
1558                 case CCREP_ACCEPT:
1559                         if (developer.integer >= 10)
1560                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
1561                         if (cls.connect_trying)
1562                         {
1563                                 lhnetaddress_t clientportaddress;
1564                                 clientportaddress = *peeraddress;
1565                                 LHNETADDRESS_SetPort(&clientportaddress, MSG_ReadLong());
1566                                 // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1567                                 InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1568                                 M_Update_Return_Reason("Accepted");
1569                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE);
1570                         }
1571                         break;
1572                 case CCREP_REJECT:
1573                         if (developer.integer >= 10)
1574                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
1575                         cls.connect_trying = false;
1576                         M_Update_Return_Reason((char *)MSG_ReadString());
1577                         break;
1578                 case CCREP_SERVER_INFO:
1579                         if (developer.integer >= 10)
1580                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
1581                         // LordHavoc: because the quake server may report weird addresses
1582                         // we just ignore it and keep the real address
1583                         MSG_ReadString();
1584                         // search the cache for this server and update it
1585                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1586                         if (n < 0)
1587                                 break;
1588
1589                         info = &serverlist_cache[n].info;
1590                         strlcpy(info->game, "Quake", sizeof(info->game));
1591                         strlcpy(info->mod , "", sizeof(info->mod)); // mod name is not specified
1592                         strlcpy(info->name, MSG_ReadString(), sizeof(info->name));
1593                         strlcpy(info->map , MSG_ReadString(), sizeof(info->map));
1594                         info->numplayers = MSG_ReadByte();
1595                         info->maxplayers = MSG_ReadByte();
1596                         info->protocol = MSG_ReadByte();
1597
1598                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1599
1600                         break;
1601                 case CCREP_PLAYER_INFO:
1602                         // we got a CCREP_PLAYER_INFO??
1603                         //if (developer.integer >= 10)
1604                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
1605                         break;
1606                 case CCREP_RULE_INFO:
1607                         // we got a CCREP_RULE_INFO??
1608                         //if (developer.integer >= 10)
1609                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
1610                         break;
1611                 default:
1612                         break;
1613                 }
1614                 SZ_Clear(&net_message);
1615                 // we may not have liked the packet, but it was a valid control
1616                 // packet, so we're done processing this packet now
1617                 return true;
1618         }
1619         ret = 0;
1620         if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
1621                 CL_ParseServerMessage();
1622         return ret;
1623 }
1624
1625 void NetConn_QueryQueueFrame(void)
1626 {
1627         int index;
1628         int queries;
1629         int maxqueries;
1630         double timeouttime;
1631         static double querycounter = 0;
1632
1633         if (serverlist_querysleep)
1634                 return;
1635
1636         // apply a cool down time after master server replies,
1637         // to avoid messing up the ping times on the servers
1638         if (serverlist_querywaittime > realtime)
1639                 return;
1640
1641         // each time querycounter reaches 1.0 issue a query
1642         querycounter += cl.realframetime * net_slist_queriespersecond.value;
1643         maxqueries = (int)querycounter;
1644         maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer);
1645         querycounter -= maxqueries;
1646
1647         if( maxqueries == 0 ) {
1648                 return;
1649         }
1650
1651         // scan serverlist and issue queries as needed
1652     serverlist_querysleep = true;
1653
1654         timeouttime = realtime - net_slist_timeout.value;
1655         for( index = 0, queries = 0 ; index < serverlist_cachecount && queries < maxqueries ; index++ )
1656         {
1657                 serverlist_entry_t *entry = &serverlist_cache[ index ];
1658                 if( entry->query != SQS_QUERYING )
1659                 {
1660                         continue;
1661                 }
1662
1663         serverlist_querysleep = false;
1664                 if( entry->querycounter != 0 && entry->querytime > timeouttime )
1665                 {
1666                         continue;
1667                 }
1668
1669                 if( entry->querycounter != (unsigned) net_slist_maxtries.integer )
1670                 {
1671                         lhnetaddress_t address;
1672                         int socket;
1673
1674                         LHNETADDRESS_FromString(&address, entry->info.cname, 0);
1675                         if (entry->protocol == PROTOCOL_QUAKEWORLD)
1676                         {
1677                                 for (socket = 0; socket < cl_numsockets ; socket++)
1678                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address);
1679                         }
1680                         else
1681                         {
1682                                 for (socket = 0; socket < cl_numsockets ; socket++)
1683                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getinfo", &address);
1684                         }
1685
1686                         entry->querytime = realtime;
1687                         entry->querycounter++;
1688
1689                         // if not in the slist menu we should print the server to console
1690                         if (serverlist_consoleoutput)
1691                                 Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter);
1692
1693                         queries++;
1694                 }
1695                 else
1696                 {
1697                         entry->query = SQS_TIMEDOUT;
1698                 }
1699         }
1700 }
1701
1702 void NetConn_ClientFrame(void)
1703 {
1704         int i, length;
1705         lhnetaddress_t peeraddress;
1706         NetConn_UpdateSockets();
1707         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
1708         {
1709                 if (cls.connect_remainingtries == 0)
1710                         M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
1711                 cls.connect_nextsendtime = realtime + 1;
1712                 cls.connect_remainingtries--;
1713                 if (cls.connect_remainingtries <= -10)
1714                 {
1715                         cls.connect_trying = false;
1716                         M_Update_Return_Reason("Connect: Failed");
1717                         return;
1718                 }
1719                 // try challenge first (newer DP server or QW)
1720                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
1721                 // then try netquake as a fallback (old server, or netquake)
1722                 SZ_Clear(&net_message);
1723                 // save space for the header, filled in later
1724                 MSG_WriteLong(&net_message, 0);
1725                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
1726                 MSG_WriteString(&net_message, "QUAKE");
1727                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1728                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1729                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
1730                 SZ_Clear(&net_message);
1731         }
1732         for (i = 0;i < cl_numsockets;i++)
1733                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1734                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
1735         NetConn_QueryQueueFrame();
1736         if (cls.netcon && realtime > cls.netcon->timeout && !sv.active)
1737         {
1738                 Con_Print("Connection timed out\n");
1739                 CL_Disconnect();
1740                 Host_ShutdownServer ();
1741         }
1742 }
1743
1744 #define MAX_CHALLENGES 128
1745 struct challenge_s
1746 {
1747         lhnetaddress_t address;
1748         double time;
1749         char string[12];
1750 }
1751 challenge[MAX_CHALLENGES];
1752
1753 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
1754 {
1755         int i;
1756         char c;
1757         for (i = 0;i < bufferlength - 1;i++)
1758         {
1759                 do
1760                 {
1761                         c = rand () % (127 - 33) + 33;
1762                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
1763                 buffer[i] = c;
1764         }
1765         buffer[i] = 0;
1766 }
1767
1768 static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus)
1769 {
1770         unsigned int nb_clients = 0, nb_bots = 0, i;
1771         int length;
1772
1773         // How many clients are there?
1774         for (i = 0;i < (unsigned int)svs.maxclients;i++)
1775         {
1776                 if (svs.clients[i].active)
1777                 {
1778                         nb_clients++;
1779                         if (!svs.clients[i].netconnection)
1780                                 nb_bots++;
1781                 }
1782         }
1783
1784         // TODO: we should add more information for the full status string
1785         length = dpsnprintf(out_msg, out_size,
1786                                                 "\377\377\377\377%s\x0A"
1787                                                 "\\gamename\\%s\\modname\\%s\\gameversion\\%d\\sv_maxclients\\%d"
1788                                                 "\\clients\\%d\\bots\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d"
1789                                                 "%s%s"
1790                                                 "%s",
1791                                                 fullstatus ? "statusResponse" : "infoResponse",
1792                                                 gamename, com_modname, gameversion.integer, svs.maxclients,
1793                                                 nb_clients, nb_bots, sv.name, hostname.string, NET_PROTOCOL_VERSION,
1794                                                 challenge ? "\\challenge\\" : "", challenge ? challenge : "",
1795                                                 fullstatus ? "\n" : "");
1796
1797         // Make sure it fits in the buffer
1798         if (length < 0)
1799                 return false;
1800
1801         if (fullstatus)
1802         {
1803                 char *ptr;
1804                 int left;
1805
1806                 ptr = out_msg + length;
1807                 left = (int)out_size - length;
1808
1809                 for (i = 0;i < (unsigned int)svs.maxclients;i++)
1810                 {
1811                         client_t *cl = &svs.clients[i];
1812                         if (cl->active)
1813                         {
1814                                 int nameind, cleanind, pingvalue;
1815                                 char curchar;
1816                                 char cleanname [sizeof(cl->name)];
1817
1818                                 // Remove all characters '"' and '\' in the player name
1819                                 nameind = 0;
1820                                 cleanind = 0;
1821                                 do
1822                                 {
1823                                         curchar = cl->name[nameind++];
1824                                         if (curchar != '"' && curchar != '\\')
1825                                         {
1826                                                 cleanname[cleanind++] = curchar;
1827                                                 if (cleanind == sizeof(cleanname) - 1)
1828                                                         break;
1829                                         }
1830                                 } while (curchar != '\0');
1831
1832                                 pingvalue = (int)(cl->ping * 1000.0f);
1833                                 if(cl->netconnection)
1834                                         pingvalue = bound(1, pingvalue, 9999);
1835                                 else
1836                                         pingvalue = 0;
1837                                 length = dpsnprintf(ptr, left, "%d %d \"%s\"\n",
1838                                                                         cl->frags,
1839                                                                         pingvalue,
1840                                                                         cleanname);
1841                                 if(length < 0)
1842                                         return false;
1843                                 left -= length;
1844                                 ptr += length;
1845                         }
1846                 }
1847         }
1848
1849         return true;
1850 }
1851
1852 static qboolean NetConn_PreventConnectFlood(lhnetaddress_t *peeraddress)
1853 {
1854         int floodslotnum, bestfloodslotnum;
1855         double bestfloodtime;
1856         lhnetaddress_t noportpeeraddress;
1857         // see if this is a connect flood
1858         noportpeeraddress = *peeraddress;
1859         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
1860         bestfloodslotnum = 0;
1861         bestfloodtime = sv.connectfloodaddresses[bestfloodslotnum].lasttime;
1862         for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++)
1863         {
1864                 if (bestfloodtime >= sv.connectfloodaddresses[floodslotnum].lasttime)
1865                 {
1866                         bestfloodtime = sv.connectfloodaddresses[floodslotnum].lasttime;
1867                         bestfloodslotnum = floodslotnum;
1868                 }
1869                 if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0)
1870                 {
1871                         // this address matches an ongoing flood address
1872                         if (realtime < sv.connectfloodaddresses[floodslotnum].lasttime + net_connectfloodblockingtimeout.value)
1873                         {
1874                                 // renew the ban on this address so it does not expire
1875                                 // until the flood has subsided
1876                                 sv.connectfloodaddresses[floodslotnum].lasttime = realtime;
1877                                 //Con_Printf("Flood detected!\n");
1878                                 return true;
1879                         }
1880                         // the flood appears to have subsided, so allow this
1881                         bestfloodslotnum = floodslotnum; // reuse the same slot
1882                         break;
1883                 }
1884         }
1885         // begin a new timeout on this address
1886         sv.connectfloodaddresses[bestfloodslotnum].address = noportpeeraddress;
1887         sv.connectfloodaddresses[bestfloodslotnum].lasttime = realtime;
1888         //Con_Printf("Flood detection initiated!\n");
1889         return false;
1890 }
1891
1892 void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress)
1893 {
1894         int floodslotnum;
1895         lhnetaddress_t noportpeeraddress;
1896         // see if this is a connect flood
1897         noportpeeraddress = *peeraddress;
1898         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
1899         for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++)
1900         {
1901                 if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0)
1902                 {
1903                         // this address matches an ongoing flood address
1904                         // remove the ban
1905                         sv.connectfloodaddresses[floodslotnum].address.addresstype = LHNETADDRESSTYPE_NONE;
1906                         sv.connectfloodaddresses[floodslotnum].lasttime = 0;
1907                         //Con_Printf("Flood cleared!\n");
1908                 }
1909         }
1910 }
1911
1912 extern void SV_SendServerinfo (client_t *client);
1913 static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1914 {
1915         int i, ret, clientnum, best;
1916         double besttime;
1917         client_t *client;
1918         char *s, *string, response[1400], addressstring2[128], stringbuf[16384];
1919         qboolean islocal = (LHNETADDRESS_GetAddressType(peeraddress) == LHNETADDRESSTYPE_LOOP);
1920
1921         if (!sv.active)
1922                 return false;
1923
1924         // convert the address to a string incase we need it
1925         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1926
1927         // see if we can identify the sender as a local player
1928         // (this is necessary for rcon to send a reliable reply if the client is
1929         //  actually on the server, not sending remotely)
1930         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1931                 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1932                         break;
1933         if (i == svs.maxclients)
1934                 host_client = NULL;
1935
1936         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1937         {
1938                 // received a command string - strip off the packaging and put it
1939                 // into our string buffer with NULL termination
1940                 data += 4;
1941                 length -= 4;
1942                 length = min(length, (int)sizeof(stringbuf) - 1);
1943                 memcpy(stringbuf, data, length);
1944                 stringbuf[length] = 0;
1945                 string = stringbuf;
1946
1947                 if (developer.integer >= 10)
1948                 {
1949                         Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1950                         Com_HexDumpToConsole(data, length);
1951                 }
1952
1953                 if (length >= 12 && !memcmp(string, "getchallenge", 12) && (islocal || sv_public.integer > -2))
1954                 {
1955                         for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1956                         {
1957                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1958                                         break;
1959                                 if (besttime > challenge[i].time)
1960                                         besttime = challenge[best = i].time;
1961                         }
1962                         // if we did not find an exact match, choose the oldest and
1963                         // update address and string
1964                         if (i == MAX_CHALLENGES)
1965                         {
1966                                 i = best;
1967                                 challenge[i].address = *peeraddress;
1968                                 NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1969                         }
1970                         challenge[i].time = realtime;
1971                         // send the challenge
1972                         NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1973                         return true;
1974                 }
1975                 if (length > 8 && !memcmp(string, "connect\\", 8) && (islocal || sv_public.integer > -2))
1976                 {
1977                         string += 7;
1978                         length -= 7;
1979
1980                         if (!(s = SearchInfostring(string, "challenge")))
1981                                 return true;
1982                         // validate the challenge
1983                         for (i = 0;i < MAX_CHALLENGES;i++)
1984                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1985                                         break;
1986                         // if the challenge is not recognized, drop the packet
1987                         if (i == MAX_CHALLENGES)
1988                                 return true;
1989
1990                         // check engine protocol
1991                         if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1992                         {
1993                                 if (developer.integer >= 10)
1994                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1995                                 NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1996                                 return true;
1997                         }
1998
1999                         // see if this is a duplicate connection request or a disconnected
2000                         // client who is rejoining to the same client slot
2001                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2002                         {
2003                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
2004                                 {
2005                                         // this is a known client...
2006                                         if (client->spawned)
2007                                         {
2008                                                 // client crashed and is coming back,
2009                                                 // keep their stuff intact
2010                                                 if (developer.integer >= 10)
2011                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", addressstring2);
2012                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2013                                                 SV_VM_Begin();
2014                                                 SV_SendServerinfo(client);
2015                                                 SV_VM_End();
2016                                         }
2017                                         else
2018                                         {
2019                                                 // client is still trying to connect,
2020                                                 // so we send a duplicate reply
2021                                                 if (developer.integer >= 10)
2022                                                         Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
2023                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2024                                         }
2025                                         return true;
2026                                 }
2027                         }
2028
2029                         if (NetConn_PreventConnectFlood(peeraddress))
2030                                 return true;
2031
2032                         // find an empty client slot for this new client
2033                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2034                         {
2035                                 netconn_t *conn;
2036                                 if (!client->active && (conn = NetConn_Open(mysocket, peeraddress)))
2037                                 {
2038                                         // allocated connection
2039                                         if (developer.integer >= 10)
2040                                                 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
2041                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2042                                         // now set up the client
2043                                         SV_VM_Begin();
2044                                         SV_ConnectClient(clientnum, conn);
2045                                         SV_VM_End();
2046                                         NetConn_Heartbeat(1);
2047                                         return true;
2048                                 }
2049                         }
2050
2051                         // no empty slots found - server is full
2052                         if (developer.integer >= 10)
2053                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
2054                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
2055
2056                         return true;
2057                 }
2058                 if (length >= 7 && !memcmp(string, "getinfo", 7) && (islocal || sv_public.integer > -1))
2059                 {
2060                         const char *challenge = NULL;
2061
2062                         // If there was a challenge in the getinfo message
2063                         if (length > 8 && string[7] == ' ')
2064                                 challenge = string + 8;
2065
2066                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false))
2067                         {
2068                                 if (developer.integer >= 10)
2069                                         Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
2070                                 NetConn_WriteString(mysocket, response, peeraddress);
2071                         }
2072                         return true;
2073                 }
2074                 if (length >= 9 && !memcmp(string, "getstatus", 9) && (islocal || sv_public.integer > -1))
2075                 {
2076                         const char *challenge = NULL;
2077
2078                         // If there was a challenge in the getinfo message
2079                         if (length > 10 && string[9] == ' ')
2080                                 challenge = string + 10;
2081
2082                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true))
2083                         {
2084                                 if (developer.integer >= 10)
2085                                         Con_Printf("Sending reply to client %s - %s\n", addressstring2, response);
2086                                 NetConn_WriteString(mysocket, response, peeraddress);
2087                         }
2088                         return true;
2089                 }
2090                 if (length >= 5 && !memcmp(string, "rcon ", 5))
2091                 {
2092                         int i;
2093                         char *s = string + 5;
2094                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
2095                         char password[64];
2096                         for (i = 0;*s > ' ';s++)
2097                                 if (i < (int)sizeof(password) - 1)
2098                                         password[i++] = *s;
2099                         if(*s <= ' ' && s != endpos) // skip leading ugly space
2100                                 ++s;
2101                         password[i] = 0;
2102                         if (password[0] > ' ' && !strcmp(rcon_password.string, password))
2103                         {
2104                                 // looks like a legitimate rcon command with the correct password
2105                                 char *s_ptr = s;
2106                                 Con_Printf("server received rcon command from %s:\n", host_client ? host_client->name : addressstring2);
2107                                 while(s_ptr != endpos)
2108                                 {
2109                                         size_t l = strlen(s_ptr);
2110                                         if(l)
2111                                                 Con_Printf(" %s;", s_ptr);
2112                                         s_ptr += l + 1;
2113                                 }
2114                                 Con_Printf("\n");
2115                                 rcon_redirect = true;
2116                                 rcon_redirect_bufferpos = 0;
2117                                 while(s != endpos)
2118                                 {
2119                                         size_t l = strlen(s);
2120                                         if(l)
2121                                                 Cmd_ExecuteString(s, src_command);
2122                                         s += l + 1;
2123                                 }
2124                                 rcon_redirect_buffer[rcon_redirect_bufferpos] = 0;
2125                                 rcon_redirect = false;
2126                                 // print resulting text to client
2127                                 // if client is playing, send a reliable reply instead of
2128                                 // a command packet
2129                                 if (host_client)
2130                                 {
2131                                         // if the netconnection is loop, then this is the
2132                                         // local player on a listen mode server, and it would
2133                                         // result in duplicate printing to the console
2134                                         // (not that the local player should be using rcon
2135                                         //  when they have the console)
2136                                         if (host_client->netconnection && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2137                                                 SV_ClientPrintf("%s", rcon_redirect_buffer);
2138                                 }
2139                                 else
2140                                 {
2141                                         // qw print command
2142                                         dpsnprintf(response, sizeof(response), "\377\377\377\377n%s", rcon_redirect_buffer);
2143                                         NetConn_WriteString(mysocket, response, peeraddress);
2144                                 }
2145                         }
2146                         return true;
2147                 }
2148                 if (!strncmp(string, "ping", 4))
2149                 {
2150                         if (developer.integer >= 10)
2151                                 Con_Printf("Received ping from %s, sending ack\n", addressstring2);
2152                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
2153                         return true;
2154                 }
2155                 if (!strncmp(string, "ack", 3))
2156                         return true;
2157                 // we may not have liked the packet, but it was a command packet, so
2158                 // we're done processing this packet now
2159                 return true;
2160         }
2161         // netquake control packets, supported for compatibility only, and only
2162         // when running game protocols that are normally served via this connection
2163         // protocol
2164         // (this protects more modern protocols against being used for
2165         //  Quake packet flood Denial Of Service attacks)
2166         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_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3))
2167         {
2168                 int c;
2169                 int protocolnumber;
2170                 const char *protocolname;
2171                 data += 4;
2172                 length -= 4;
2173                 SZ_Clear(&net_message);
2174                 SZ_Write(&net_message, data, length);
2175                 MSG_BeginReading();
2176                 c = MSG_ReadByte();
2177                 switch (c)
2178                 {
2179                 case CCREQ_CONNECT:
2180                         if (developer.integer >= 10)
2181                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
2182                         if(!islocal && sv_public.integer <= -2)
2183                                 break;
2184
2185                         protocolname = MSG_ReadString();
2186                         protocolnumber = MSG_ReadByte();
2187                         if (strcmp(protocolname, "QUAKE") || protocolnumber != NET_PROTOCOL_VERSION)
2188                         {
2189                                 if (developer.integer >= 10)
2190                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
2191                                 SZ_Clear(&net_message);
2192                                 // save space for the header, filled in later
2193                                 MSG_WriteLong(&net_message, 0);
2194                                 MSG_WriteByte(&net_message, CCREP_REJECT);
2195                                 MSG_WriteString(&net_message, "Incompatible version.\n");
2196                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2197                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2198                                 SZ_Clear(&net_message);
2199                                 break;
2200                         }
2201
2202                         // see if this connect request comes from a known client
2203                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2204                         {
2205                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
2206                                 {
2207                                         // this is either a duplicate connection request
2208                                         // or coming back from a timeout
2209                                         // (if so, keep their stuff intact)
2210
2211                                         // send a reply
2212                                         if (developer.integer >= 10)
2213                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
2214                                         SZ_Clear(&net_message);
2215                                         // save space for the header, filled in later
2216                                         MSG_WriteLong(&net_message, 0);
2217                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
2218                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
2219                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2220                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2221                                         SZ_Clear(&net_message);
2222
2223                                         // if client is already spawned, re-send the
2224                                         // serverinfo message as they'll need it to play
2225                                         if (client->spawned)
2226                                         {
2227                                                 SV_VM_Begin();
2228                                                 SV_SendServerinfo(client);
2229                                                 SV_VM_End();
2230                                         }
2231                                         return true;
2232                                 }
2233                         }
2234
2235                         // this is a new client, check for connection flood
2236                         if (NetConn_PreventConnectFlood(peeraddress))
2237                                 break;
2238
2239                         // find a slot for the new client
2240                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2241                         {
2242                                 netconn_t *conn;
2243                                 if (!client->active && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
2244                                 {
2245                                         // connect to the client
2246                                         // everything is allocated, just fill in the details
2247                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
2248                                         if (developer.integer >= 10)
2249                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
2250                                         // send back the info about the server connection
2251                                         SZ_Clear(&net_message);
2252                                         // save space for the header, filled in later
2253                                         MSG_WriteLong(&net_message, 0);
2254                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
2255                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
2256                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2257                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2258                                         SZ_Clear(&net_message);
2259                                         // now set up the client struct
2260                                         SV_VM_Begin();
2261                                         SV_ConnectClient(clientnum, conn);
2262                                         SV_VM_End();
2263                                         NetConn_Heartbeat(1);
2264                                         return true;
2265                                 }
2266                         }
2267
2268                         if (developer.integer >= 10)
2269                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
2270                         // no room; try to let player know
2271                         SZ_Clear(&net_message);
2272                         // save space for the header, filled in later
2273                         MSG_WriteLong(&net_message, 0);
2274                         MSG_WriteByte(&net_message, CCREP_REJECT);
2275                         MSG_WriteString(&net_message, "Server is full.\n");
2276                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2277                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2278                         SZ_Clear(&net_message);
2279                         break;
2280                 case CCREQ_SERVER_INFO:
2281                         if (developer.integer >= 10)
2282                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
2283                         if(!islocal && sv_public.integer <= -1)
2284                                 break;
2285                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
2286                         {
2287                                 int numclients;
2288                                 char myaddressstring[128];
2289                                 if (developer.integer >= 10)
2290                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
2291                                 SZ_Clear(&net_message);
2292                                 // save space for the header, filled in later
2293                                 MSG_WriteLong(&net_message, 0);
2294                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
2295                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), myaddressstring, sizeof(myaddressstring), true);
2296                                 MSG_WriteString(&net_message, myaddressstring);
2297                                 MSG_WriteString(&net_message, hostname.string);
2298                                 MSG_WriteString(&net_message, sv.name);
2299                                 // How many clients are there?
2300                                 for (i = 0, numclients = 0;i < svs.maxclients;i++)
2301                                         if (svs.clients[i].active)
2302                                                 numclients++;
2303                                 MSG_WriteByte(&net_message, numclients);
2304                                 MSG_WriteByte(&net_message, svs.maxclients);
2305                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2306                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2307                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2308                                 SZ_Clear(&net_message);
2309                         }
2310                         break;
2311                 case CCREQ_PLAYER_INFO:
2312                         if (developer.integer >= 10)
2313                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
2314                         if(!islocal && sv_public.integer <= -1)
2315                                 break;
2316                         if (sv.active)
2317                         {
2318                                 int playerNumber, activeNumber, clientNumber;
2319                                 client_t *client;
2320
2321                                 playerNumber = MSG_ReadByte();
2322                                 activeNumber = -1;
2323                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
2324                                         if (client->active && ++activeNumber == playerNumber)
2325                                                 break;
2326                                 if (clientNumber != svs.maxclients)
2327                                 {
2328                                         SZ_Clear(&net_message);
2329                                         // save space for the header, filled in later
2330                                         MSG_WriteLong(&net_message, 0);
2331                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
2332                                         MSG_WriteByte(&net_message, playerNumber);
2333                                         MSG_WriteString(&net_message, client->name);
2334                                         MSG_WriteLong(&net_message, client->colors);
2335                                         MSG_WriteLong(&net_message, client->frags);
2336                                         MSG_WriteLong(&net_message, (int)(realtime - client->connecttime));
2337                                         MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient");
2338                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2339                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2340                                         SZ_Clear(&net_message);
2341                                 }
2342                         }
2343                         break;
2344                 case CCREQ_RULE_INFO:
2345                         if (developer.integer >= 10)
2346                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
2347                         if(!islocal && sv_public.integer <= -1)
2348                                 break;
2349                         if (sv.active)
2350                         {
2351                                 char *prevCvarName;
2352                                 cvar_t *var;
2353
2354                                 // find the search start location
2355                                 prevCvarName = MSG_ReadString();
2356                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
2357
2358                                 // send the response
2359                                 SZ_Clear(&net_message);
2360                                 // save space for the header, filled in later
2361                                 MSG_WriteLong(&net_message, 0);
2362                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
2363                                 if (var)
2364                                 {
2365                                         MSG_WriteString(&net_message, var->name);
2366                                         MSG_WriteString(&net_message, var->string);
2367                                 }
2368                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2369                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2370                                 SZ_Clear(&net_message);
2371                         }
2372                         break;
2373                 default:
2374                         break;
2375                 }
2376                 SZ_Clear(&net_message);
2377                 // we may not have liked the packet, but it was a valid control
2378                 // packet, so we're done processing this packet now
2379                 return true;
2380         }
2381         if (host_client)
2382         {
2383                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol, host_client->spawned ? net_messagetimeout.value : net_connecttimeout.value)) == 2)
2384                 {
2385                         SV_VM_Begin();
2386                         SV_ReadClientMessage();
2387                         SV_VM_End();
2388                         return ret;
2389                 }
2390         }
2391         return 0;
2392 }
2393
2394 void NetConn_ServerFrame(void)
2395 {
2396         int i, length;
2397         lhnetaddress_t peeraddress;
2398         for (i = 0;i < sv_numsockets;i++)
2399                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2400                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
2401         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2402         {
2403                 // never timeout loopback connections
2404                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2405                 {
2406                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
2407                         SV_VM_Begin();
2408                         SV_DropClient(false);
2409                         SV_VM_End();
2410                 }
2411         }
2412 }
2413
2414 void NetConn_SleepMicroseconds(int microseconds)
2415 {
2416         LHNET_SleepUntilPacket_Microseconds(microseconds);
2417 }
2418
2419 void NetConn_QueryMasters(qboolean querydp, qboolean queryqw)
2420 {
2421         int i;
2422         int masternum;
2423         lhnetaddress_t masteraddress;
2424         lhnetaddress_t broadcastaddress;
2425         char request[256];
2426
2427         if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
2428                 return;
2429
2430         // 26000 is the default quake server port, servers on other ports will not
2431         // be found
2432         // note this is IPv4-only, I doubt there are IPv6-only LANs out there
2433         LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
2434
2435         if (querydp)
2436         {
2437                 for (i = 0;i < cl_numsockets;i++)
2438                 {
2439                         if (cl_sockets[i])
2440                         {
2441                                 // search LAN for Quake servers
2442                                 SZ_Clear(&net_message);
2443                                 // save space for the header, filled in later
2444                                 MSG_WriteLong(&net_message, 0);
2445                                 MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
2446                                 MSG_WriteString(&net_message, "QUAKE");
2447                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2448                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2449                                 NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress);
2450                                 SZ_Clear(&net_message);
2451
2452                                 // search LAN for DarkPlaces servers
2453                                 NetConn_WriteString(cl_sockets[i], "\377\377\377\377getinfo", &broadcastaddress);
2454
2455                                 // build the getservers message to send to the dpmaster master servers
2456                                 dpsnprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
2457
2458                                 // search internet
2459                                 for (masternum = 0;sv_masters[masternum].name;masternum++)
2460                                 {
2461                                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
2462                                         {
2463                                                 masterquerycount++;
2464                                                 NetConn_WriteString(cl_sockets[i], request, &masteraddress);
2465                                         }
2466                                 }
2467                         }
2468                 }
2469         }
2470
2471         // only query QuakeWorld servers when the user wants to
2472         if (queryqw)
2473         {
2474                 for (i = 0;i < cl_numsockets;i++)
2475                 {
2476                         if (cl_sockets[i])
2477                         {
2478                                 // search LAN for QuakeWorld servers
2479                                 NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &broadcastaddress);
2480
2481                                 // build the getservers message to send to the qwmaster master servers
2482                                 // note this has no -1 prefix, and the trailing nul byte is sent
2483                                 dpsnprintf(request, sizeof(request), "c\n");
2484
2485                                 // search internet
2486                                 for (masternum = 0;sv_qwmasters[masternum].name;masternum++)
2487                                 {
2488                                         if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
2489                                         {
2490                                                 if (m_state != m_slist)
2491                                                 {
2492                                                         char lookupstring[128];
2493                                                         LHNETADDRESS_ToString(&masteraddress, lookupstring, sizeof(lookupstring), true);
2494                                                         Con_Printf("Querying master %s (resolved from %s)\n", lookupstring, sv_qwmasters[masternum].string);
2495                                                 }
2496                                                 masterquerycount++;
2497                                                 NetConn_Write(cl_sockets[i], request, (int)strlen(request) + 1, &masteraddress);
2498                                         }
2499                                 }
2500                         }
2501                 }
2502         }
2503         if (!masterquerycount)
2504         {
2505                 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
2506                 M_Update_Return_Reason("No network");
2507         }
2508 }
2509
2510 void NetConn_Heartbeat(int priority)
2511 {
2512         lhnetaddress_t masteraddress;
2513         int masternum;
2514         lhnetsocket_t *mysocket;
2515
2516         // if it's a state change (client connected), limit next heartbeat to no
2517         // more than 30 sec in the future
2518         if (priority == 1 && nextheartbeattime > realtime + 30.0)
2519                 nextheartbeattime = realtime + 30.0;
2520
2521         // limit heartbeatperiod to 30 to 270 second range,
2522         // lower limit is to avoid abusing master servers with excess traffic,
2523         // upper limit is to avoid timing out on the master server (which uses
2524         // 300 sec timeout)
2525         if (sv_heartbeatperiod.value < 30)
2526                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
2527         if (sv_heartbeatperiod.value > 270)
2528                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
2529
2530         // make advertising optional and don't advertise singleplayer games, and
2531         // only send a heartbeat as often as the admin wants
2532         if (sv.active && sv_public.integer > 0 && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
2533         {
2534                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
2535                 for (masternum = 0;sv_masters[masternum].name;masternum++)
2536                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
2537                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
2538         }
2539 }
2540
2541 static void Net_Heartbeat_f(void)
2542 {
2543         if (sv.active)
2544                 NetConn_Heartbeat(2);
2545         else
2546                 Con_Print("No server running, can not heartbeat to master server.\n");
2547 }
2548
2549 void PrintStats(netconn_t *conn)
2550 {
2551         if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD))
2552                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->qw.outgoing_sequence, conn->qw.incoming_sequence);
2553         else
2554                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence);
2555 }
2556
2557 void Net_Stats_f(void)
2558 {
2559         netconn_t *conn;
2560         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
2561         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
2562         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
2563         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
2564         Con_Printf("packetsSent                = %i\n", packetsSent);
2565         Con_Printf("packetsReSent              = %i\n", packetsReSent);
2566         Con_Printf("packetsReceived            = %i\n", packetsReceived);
2567         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
2568         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
2569         Con_Print("connections                =\n");
2570         for (conn = netconn_list;conn;conn = conn->next)
2571                 PrintStats(conn);
2572 }
2573
2574 void Net_Slist_f(void)
2575 {
2576         ServerList_ResetMasks();
2577         serverlist_sortbyfield = SLIF_PING;
2578         serverlist_sortdescending = false;
2579     if (m_state != m_slist) {
2580                 Con_Print("Sending requests to master servers\n");
2581                 ServerList_QueryList(true, false);
2582                 serverlist_consoleoutput = true;
2583                 Con_Print("Listening for replies...\n");
2584         } else
2585                 ServerList_QueryList(true, false);
2586 }
2587
2588 void Net_SlistQW_f(void)
2589 {
2590         ServerList_ResetMasks();
2591         serverlist_sortbyfield = SLIF_PING;
2592         serverlist_sortdescending = false;
2593     if (m_state != m_slist) {
2594                 Con_Print("Sending requests to master servers\n");
2595                 ServerList_QueryList(false, true);
2596                 serverlist_consoleoutput = true;
2597                 Con_Print("Listening for replies...\n");
2598         } else
2599                 ServerList_QueryList(false, true);
2600 }
2601
2602 void NetConn_Init(void)
2603 {
2604         int i;
2605         lhnetaddress_t tempaddress;
2606         netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
2607         Cmd_AddCommand("net_stats", Net_Stats_f, "print network statistics");
2608         Cmd_AddCommand("net_slist", Net_Slist_f, "query dp master servers and print all server information");
2609         Cmd_AddCommand("net_slistqw", Net_SlistQW_f, "query qw master servers and print all server information");
2610         Cmd_AddCommand("heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)");
2611         Cvar_RegisterVariable(&net_slist_queriespersecond);
2612         Cvar_RegisterVariable(&net_slist_queriesperframe);
2613         Cvar_RegisterVariable(&net_slist_timeout);
2614         Cvar_RegisterVariable(&net_slist_maxtries);
2615         Cvar_RegisterVariable(&net_messagetimeout);
2616         Cvar_RegisterVariable(&net_connecttimeout);
2617         Cvar_RegisterVariable(&net_connectfloodblockingtimeout);
2618         Cvar_RegisterVariable(&cl_netlocalping);
2619         Cvar_RegisterVariable(&cl_netpacketloss_send);
2620         Cvar_RegisterVariable(&cl_netpacketloss_receive);
2621         Cvar_RegisterVariable(&hostname);
2622         Cvar_RegisterVariable(&developer_networking);
2623         Cvar_RegisterVariable(&cl_netport);
2624         Cvar_RegisterVariable(&sv_netport);
2625         Cvar_RegisterVariable(&net_address);
2626         //Cvar_RegisterVariable(&net_address_ipv6);
2627         Cvar_RegisterVariable(&sv_public);
2628         Cvar_RegisterVariable(&sv_heartbeatperiod);
2629         for (i = 0;sv_masters[i].name;i++)
2630                 Cvar_RegisterVariable(&sv_masters[i]);
2631         Cvar_RegisterVariable(&gameversion);
2632 // 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.
2633         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
2634         {
2635                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
2636                 {
2637                         Con_Printf("-ip option used, setting net_address to \"%s\"\n", com_argv[i + 1]);
2638                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
2639                 }
2640                 else
2641                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
2642         }
2643 // 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
2644         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
2645         {
2646                 i = atoi(com_argv[i + 1]);
2647                 if (i >= 0 && i < 65536)
2648                 {
2649                         Con_Printf("-port option used, setting port cvar to %i\n", i);
2650                         Cvar_SetValueQuick(&sv_netport, i);
2651                 }
2652                 else
2653                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
2654         }
2655         cl_numsockets = 0;
2656         sv_numsockets = 0;
2657         net_message.data = net_message_buf;
2658         net_message.maxsize = sizeof(net_message_buf);
2659         net_message.cursize = 0;
2660         LHNET_Init();
2661 }
2662
2663 void NetConn_Shutdown(void)
2664 {
2665         NetConn_CloseClientPorts();
2666         NetConn_CloseServerPorts();
2667         LHNET_Shutdown();
2668 }
2669