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", "advertises this server on the master server (so that players can find it in the server browser)"};
  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", "12.166.196.192", "default master server 3 (admin: Venim)"}, // admin: Venim
  42         {0, "sv_masterextra4", "excalibur.nvg.ntnu.no", "default master server 4 (admin: tChr)"}, // admin: tChr
  43         {0, NULL, NULL, NULL}
  44 };
  45
  46 static cvar_t sv_qwmasters [] =
  47 {
  48         {CVAR_SAVE, "sv_qwmaster1", "", "user-chosen qwmaster server 1"},
  49         {CVAR_SAVE, "sv_qwmaster2", "", "user-chosen qwmaster server 2"},
  50         {CVAR_SAVE, "sv_qwmaster3", "", "user-chosen qwmaster server 3"},
  51         {CVAR_SAVE, "sv_qwmaster4", "", "user-chosen qwmaster server 4"},
  52         {0, "sv_qwmasterextra1", "satan.idsoftware.com", "default qwmaster server 1 (admin: idSoftware)"},
  53         {0, "sv_qwmasterextra2", "192.246.40.37:27000", "id Limbo (admin: id Software)"},
  54         {0, "sv_qwmasterextra3", "192.246.40.37:27002", "id CTF (admin: id Software)"},
  55         {0, "sv_qwmasterextra4", "192.246.40.37:27003", "id TeamFortress (admin: id Software)"},
  56         {0, "sv_qwmasterextra5", "192.246.40.37:27004", "id Miscilaneous (admin: id Software)"},
  57         {0, "sv_qwmasterextra6", "192.246.40.37:27006", "id Deathmatch Only (admin: id Software)"},
  58         {0, "sv_qwmasterextra7", "150.254.66.120:27000", "Poland's master server. (admin: unknown)"},
  59         {0, "sv_qwmasterextra8", "62.112.145.129:27000", "Ocrana master server. (admin: unknown)"},
  60         {0, "sv_qwmasterextra9", "master.edome.net", "edome master server. (admin: unknown)"},
  61         {0, "sv_qwmasterextra10", "qwmaster.barrysworld.com", "barrysworld master server. (admin: unknown)"},
  62         {0, "sv_qwmasterextra11", "qwmaster.ocrana.de:27000", "Ocrana2 master server. (admin: unknown)"},
  63         {0, "sv_qwmasterextra12", "213.221.174.165:27000", "unknown1 master server. (admin: unknown)"},
  64         {0, "sv_qwmasterextra13", "195.74.0.8", "unknown2 master server. (admin: unknown)"},
  65         {0, "sv_qwmasterextra14", "192.246.40.37", "unknown3 master server. (admin: unknown)"},
  66         {0, "sv_qwmasterextra15", "192.246.40.37:27006", "unknown4 master server. (admin: unknown)"},
  67         {0, "sv_qwmasterextra16", "204.182.161.2", "unknown5 master server. (admin: unknown)"},
  68         {0, NULL, NULL, NULL}
  69 };
  70
  71 static double nextheartbeattime = 0;
  72
  73 sizebuf_t net_message;
  74 static unsigned char net_message_buf[NET_MAXMESSAGE];
  75
  76 cvar_t net_messagetimeout = {0, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"};
  77 cvar_t net_messagerejointimeout = {0, "net_messagerejointimeout","10", "give a player this much time in seconds to rejoin and continue playing (not losing frags and such)"};
  78 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)"};
  79 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"};
  80 cvar_t developer_networking = {0, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"};
  81
  82 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)"};
  83 static cvar_t cl_netpacketloss = {0, "cl_netpacketloss","0", "drops this percentage of packets (incoming and outgoing), useful for testing network protocol robustness (effects failing to start, sounds failing to play, etc)"};
  84 static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20", "how many server information requests to send per second"};
  85 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)"};
  86 static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"};
  87 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)"};
  88
  89 /* statistic counters */
  90 static int packetsSent = 0;
  91 static int packetsReSent = 0;
  92 static int packetsReceived = 0;
  93 static int receivedDuplicateCount = 0;
  94 static int droppedDatagrams = 0;
  95
  96 static int unreliableMessagesSent = 0;
  97 static int unreliableMessagesReceived = 0;
  98 static int reliableMessagesSent = 0;
  99 static int reliableMessagesReceived = 0;
 100
 101 double masterquerytime = -1000;
 102 int masterquerycount = 0;
 103 int masterreplycount = 0;
 104 int serverquerycount = 0;
 105 int serverreplycount = 0;
 106
 107 // this is only false if there are still servers left to query
 108 int serverlist_querysleep = true;
 109 // this is pushed a second or two ahead of realtime whenever a master server
 110 // reply is received, to avoid issuing queries while master replies are still
 111 // flooding in (which would make a mess of the ping times)
 112 double serverlist_querywaittime = 0;
 113
 114 static unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 115 static unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 116
 117 int cl_numsockets;
 118 lhnetsocket_t *cl_sockets[16];
 119 int sv_numsockets;
 120 lhnetsocket_t *sv_sockets[16];
 121
 122 netconn_t *netconn_list = NULL;
 123 mempool_t *netconn_mempool = NULL;
 124
 125 cvar_t cl_netport = {0, "cl_port", "0", "forces client to use chosen port number if not 0"};
 126 cvar_t sv_netport = {0, "port", "26000", "server port for players to connect to"};
 127 cvar_t net_address = {0, "net_address", "0.0.0.0", "network address to open ports on"};
 128 //cvar_t net_netaddress_ipv6 = {0, "net_address_ipv6", "[0:0:0:0:0:0:0:0]", "network address to open ipv6 ports on"};
 129
 130 // ServerList interface
 131 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
 132 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
 133
 134 serverlist_infofield_t serverlist_sortbyfield;
 135 qboolean serverlist_sortdescending;
 136
 137 int serverlist_viewcount = 0;
 138 serverlist_entry_t *serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
 139
 140 int serverlist_cachecount;
 141 serverlist_entry_t serverlist_cache[SERVERLIST_TOTALSIZE];
 142
 143 qboolean serverlist_consoleoutput;
 144
 145 // helper function to insert a value into the viewset
 146 // spare entries will be removed
 147 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
 148 {
 149     int i;
 150         if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) {
 151                 i = serverlist_viewcount++;
 152         } else {
 153                 i = SERVERLIST_VIEWLISTSIZE - 1;
 154         }
 155
 156         for( ; i > index ; i-- )
 157                 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
 158
 159         serverlist_viewlist[index] = entry;
 160 }
 161
 162 // we suppose serverlist_viewcount to be valid, ie > 0
 163 static void _ServerList_ViewList_Helper_Remove( int index )
 164 {
 165         serverlist_viewcount--;
 166         for( ; index < serverlist_viewcount ; index++ )
 167                 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
 168 }
 169
 170 // returns true if A should be inserted before B
 171 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
 172 {
 173         int result = 0; // > 0 if for numbers A > B and for text if A < B
 174
 175         switch( serverlist_sortbyfield ) {
 176                 case SLIF_PING:
 177                         result = A->info.ping - B->info.ping;
 178                         break;
 179                 case SLIF_MAXPLAYERS:
 180                         result = A->info.maxplayers - B->info.maxplayers;
 181                         break;
 182                 case SLIF_NUMPLAYERS:
 183                         result = A->info.numplayers - B->info.numplayers;
 184                         break;
 185                 case SLIF_PROTOCOL:
 186                         result = A->info.protocol - B->info.protocol;
 187                         break;
 188                 case SLIF_CNAME:
 189                         result = strcmp( B->info.cname, A->info.cname );
 190                         break;
 191                 case SLIF_GAME:
 192                         result = strcmp( B->info.game, A->info.game );
 193                         break;
 194                 case SLIF_MAP:
 195                         result = strcmp( B->info.map, A->info.map );
 196                         break;
 197                 case SLIF_MOD:
 198                         result = strcmp( B->info.mod, A->info.mod );
 199                         break;
 200                 case SLIF_NAME:
 201                         result = strcmp( B->info.name, A->info.name );
 202                         break;
 203                 default:
 204                         Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
 205                         break;
 206         }
 207
 208         if( serverlist_sortdescending )
 209                 return result > 0;
 210         return result < 0;
 211 }
 212
 213 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
 214 {
 215         // This should actually be done with some intermediate and end-of-function return
 216         switch( op ) {
 217                 case SLMO_LESS:
 218                         return A < B;
 219                 case SLMO_LESSEQUAL:
 220                         return A <= B;
 221                 case SLMO_EQUAL:
 222                         return A == B;
 223                 case SLMO_GREATER:
 224                         return A > B;
 225                 case SLMO_NOTEQUAL:
 226                         return A != B;
 227                 case SLMO_GREATEREQUAL:
 228                 case SLMO_CONTAINS:
 229                 case SLMO_NOTCONTAIN:
 230                         return A >= B;
 231                 default:
 232                         Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
 233                         return false;
 234         }
 235 }
 236
 237 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
 238 {
 239         int i;
 240         char bufferA[ 256 ], bufferB[ 256 ]; // should be more than enough
 241         for (i = 0;i < (int)sizeof(bufferA)-1 && A[i];i++)
 242                 bufferA[i] = (A[i] >= 'A' && A[i] <= 'Z') ? (A[i] + 'a' - 'A') : A[i];
 243         bufferA[i] = 0;
 244         for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++)
 245                 bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i];
 246         bufferB[i] = 0;
 247
 248         // Same here, also using an intermediate & final return would be more appropriate
 249         // A info B mask
 250         switch( op ) {
 251                 case SLMO_CONTAINS:
 252                         return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool
 253                 case SLMO_NOTCONTAIN:
 254                         return !*bufferB || !strstr( bufferA, bufferB );
 255                 case SLMO_LESS:
 256                         return strcmp( bufferA, bufferB ) < 0;
 257                 case SLMO_LESSEQUAL:
 258                         return strcmp( bufferA, bufferB ) <= 0;
 259                 case SLMO_EQUAL:
 260                         return strcmp( bufferA, bufferB ) == 0;
 261                 case SLMO_GREATER:
 262                         return strcmp( bufferA, bufferB ) > 0;
 263                 case SLMO_NOTEQUAL:
 264                         return strcmp( bufferA, bufferB ) != 0;
 265                 case SLMO_GREATEREQUAL:
 266                         return strcmp( bufferA, bufferB ) >= 0;
 267                 default:
 268                         Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
 269                         return false;
 270         }
 271 }
 272
 273 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
 274 {
 275         if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
 276                 return false;
 277         if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
 278                 return false;
 279         if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
 280                 return false;
 281         if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
 282                 return false;
 283         if( *mask->info.cname
 284                 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
 285                 return false;
 286         if( *mask->info.game
 287                 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
 288                 return false;
 289         if( *mask->info.mod
 290                 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
 291                 return false;
 292         if( *mask->info.map
 293                 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
 294                 return false;
 295         if( *mask->info.name
 296                 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
 297                 return false;
 298         return true;
 299 }
 300
 301 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
 302 {
 303         int start, end, mid;
 304
 305         // FIXME: change this to be more readable (...)
 306         // now check whether it passes through the masks
 307         for( start = 0 ; serverlist_andmasks[start].active && start < SERVERLIST_ANDMASKCOUNT ; start++ )
 308                 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
 309                         return;
 310
 311         for( start = 0 ; serverlist_ormasks[start].active && start < SERVERLIST_ORMASKCOUNT ; start++ )
 312                 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
 313                         break;
 314         if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
 315                 return;
 316
 317         if( !serverlist_viewcount ) {
 318                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 319                 return;
 320         }
 321         // ok, insert it, we just need to find out where exactly:
 322
 323         // two special cases
 324         // check whether to insert it as new first item
 325         if( _ServerList_Entry_Compare( entry, serverlist_viewlist[0] ) ) {
 326                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 327                 return;
 328         } // check whether to insert it as new last item
 329         else if( !_ServerList_Entry_Compare( entry, serverlist_viewlist[serverlist_viewcount - 1] ) ) {
 330                 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
 331                 return;
 332         }
 333         start = 0;
 334         end = serverlist_viewcount - 1;
 335         while( end > start + 1 )
 336         {
 337                 mid = (start + end) / 2;
 338                 // test the item that lies in the middle between start and end
 339                 if( _ServerList_Entry_Compare( entry, serverlist_viewlist[mid] ) )
 340                         // the item has to be in the upper half
 341                         end = mid;
 342                 else
 343                         // the item has to be in the lower half
 344                         start = mid;
 345         }
 346         _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
 347 }
 348
 349 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
 350 {
 351         int i;
 352         for( i = 0; i < serverlist_viewcount; i++ )
 353         {
 354                 if (serverlist_viewlist[i] == entry)
 355                 {
 356                         _ServerList_ViewList_Helper_Remove(i);
 357                         break;
 358                 }
 359         }
 360 }
 361
 362 void ServerList_RebuildViewList(void)
 363 {
 364         int i;
 365
 366         serverlist_viewcount = 0;
 367         for( i = 0 ; i < serverlist_cachecount ; i++ )
 368                 if( serverlist_cache[i].query == SQS_QUERIED )
 369                         ServerList_ViewList_Insert( &serverlist_cache[i] );
 370 }
 371
 372 void ServerList_ResetMasks(void)
 373 {
 374         memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
 375         memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
 376 }
 377
 378 #if 0
 379 static void _ServerList_Test(void)
 380 {
 381         int i;
 382         for( i = 0 ; i < 1024 ; i++ ) {
 383                 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) );
 384                 serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i;
 385                 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i );
 386                 serverlist_cache[serverlist_cachecount].finished = true;
 387                 sprintf( serverlist_cache[serverlist_cachecount].line1, "%i %s", serverlist_cache[serverlist_cachecount].info.ping, serverlist_cache[serverlist_cachecount].info.name );
 388                 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
 389                 serverlist_cachecount++;
 390         }
 391 }
 392 #endif
 393
 394 void ServerList_QueryList(void)
 395 {
 396         //masterquerytime = realtime;
 397         masterquerytime = Sys_DoubleTime();
 398         masterquerycount = 0;
 399         masterreplycount = 0;
 400         serverquerycount = 0;
 401         serverreplycount = 0;
 402         serverlist_cachecount = 0;
 403         serverlist_viewcount = 0;
 404         serverlist_consoleoutput = false;
 405
 406         //_ServerList_Test();
 407
 408         NetConn_QueryMasters();
 409 }
 410
 411 // rest
 412
 413 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
 414 {
 415         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 416         int i;
 417         if (length == 0)
 418                 return 0;
 419         if (cl_netpacketloss.integer)
 420                 for (i = 0;i < cl_numsockets;i++)
 421                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer)
 422                                 return 0;
 423         if (developer_networking.integer)
 424         {
 425                 char addressstring[128], addressstring2[128];
 426                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 427                 if (length > 0)
 428                 {
 429                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 430                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
 431                         Com_HexDumpToConsole((unsigned char *)data, length);
 432                 }
 433                 else
 434                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
 435         }
 436         return length;
 437 }
 438
 439 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 440 {
 441         int ret;
 442         int i;
 443         if (cl_netpacketloss.integer)
 444                 for (i = 0;i < cl_numsockets;i++)
 445                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer)
 446                                 return length;
 447         ret = LHNET_Write(mysocket, data, length, peeraddress);
 448         if (developer_networking.integer)
 449         {
 450                 char addressstring[128], addressstring2[128];
 451                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 452                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 453                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 454                 Com_HexDumpToConsole((unsigned char *)data, length);
 455         }
 456         return ret;
 457 }
 458
 459 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 460 {
 461         // note this does not include the trailing NULL because we add that in the parser
 462         return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress);
 463 }
 464
 465 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol)
 466 {
 467         if (protocol == PROTOCOL_QUAKEWORLD)
 468         {
 469                 int packetLen;
 470                 qboolean sendreliable;
 471
 472                 // note that it is ok to send empty messages to the qw server,
 473                 // otherwise it won't respond to us at all
 474
 475                 sendreliable = false;
 476                 // if the remote side dropped the last reliable message, resend it
 477                 if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence)
 478                         sendreliable = true;
 479                 // if the reliable transmit buffer is empty, copy the current message out
 480                 if (!conn->sendMessageLength && conn->message.cursize)
 481                 {
 482                         memcpy (conn->sendMessage, conn->message.data, conn->message.cursize);
 483                         conn->sendMessageLength = conn->message.cursize;
 484                         SZ_Clear(&conn->message); // clear the message buffer
 485                         conn->qw.reliable_sequence ^= 1;
 486                         sendreliable = true;
 487                 }
 488                 // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1)
 489                 *((int *)(sendbuffer + 0)) = LittleLong((unsigned int)conn->qw.outgoing_sequence | ((unsigned int)sendreliable<<31));
 490                 // last received unreliable packet number, and last received reliable packet number (0 or 1)
 491                 *((int *)(sendbuffer + 4)) = LittleLong((unsigned int)conn->qw.incoming_sequence | ((unsigned int)conn->qw.incoming_reliable_sequence<<31));
 492                 packetLen = 8;
 493                 conn->qw.outgoing_sequence++;
 494                 // client sends qport in every packet
 495                 if (conn == cls.netcon)
 496                 {
 497                         *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport);
 498                         packetLen += 2;
 499                 }
 500                 if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400)
 501                 {
 502                         Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize);
 503                         return -1;
 504                 }
 505                 // add the reliable message if there is one
 506                 if (sendreliable)
 507                 {
 508                         memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength);
 509                         packetLen += conn->sendMessageLength;
 510                         conn->qw.last_reliable_sequence = conn->qw.outgoing_sequence;
 511                 }
 512                 // add the unreliable message if possible
 513                 if (packetLen + data->cursize <= 1400)
 514                 {
 515                         memcpy(sendbuffer + packetLen, data->data, data->cursize);
 516                         packetLen += data->cursize;
 517                 }
 518
 519                 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 520
 521                 packetsSent++;
 522                 unreliableMessagesSent++;
 523
 524                 // delay later packets to obey rate limit
 525                 conn->qw.cleartime = max(conn->qw.cleartime, realtime) + packetLen * conn->qw.rate;
 526
 527                 return 0;
 528         }
 529         else
 530         {
 531                 unsigned int packetLen;
 532                 unsigned int dataLen;
 533                 unsigned int eom;
 534                 unsigned int *header;
 535
 536                 // if a reliable message fragment has been lost, send it again
 537                 if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0)
 538                 {
 539                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 540                         {
 541                                 dataLen = conn->sendMessageLength;
 542                                 eom = NETFLAG_EOM;
 543                         }
 544                         else
 545                         {
 546                                 dataLen = MAX_PACKETFRAGMENT;
 547                                 eom = 0;
 548                         }
 549
 550                         packetLen = NET_HEADERSIZE + dataLen;
 551
 552                         header = (unsigned int *)sendbuffer;
 553                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 554                         header[1] = BigLong(conn->nq.sendSequence - 1);
 555                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 556
 557                         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
 558                         {
 559                                 conn->lastSendTime = realtime;
 560                                 packetsReSent++;
 561                         }
 562                 }
 563
 564                 // if we have a new reliable message to send, do so
 565                 if (!conn->sendMessageLength && conn->message.cursize)
 566                 {
 567                         if (conn->message.cursize > (int)sizeof(conn->sendMessage))
 568                         {
 569                                 Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, sizeof(conn->sendMessage));
 570                                 conn->message.overflowed = true;
 571                                 return -1;
 572                         }
 573
 574                         if (developer_networking.integer && conn == cls.netcon)
 575                         {
 576                                 Con_Print("client sending reliable message to server:\n");
 577                                 SZ_HexDumpToConsole(&conn->message);
 578                         }
 579
 580                         memcpy(conn->sendMessage, conn->message.data, conn->message.cursize);
 581                         conn->sendMessageLength = conn->message.cursize;
 582                         SZ_Clear(&conn->message);
 583
 584                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 585                         {
 586                                 dataLen = conn->sendMessageLength;
 587                                 eom = NETFLAG_EOM;
 588                         }
 589                         else
 590                         {
 591                                 dataLen = MAX_PACKETFRAGMENT;
 592                                 eom = 0;
 593                         }
 594
 595                         packetLen = NET_HEADERSIZE + dataLen;
 596
 597                         header = (unsigned int *)sendbuffer;
 598                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 599                         header[1] = BigLong(conn->nq.sendSequence);
 600                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 601
 602                         conn->nq.sendSequence++;
 603
 604                         NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 605
 606                         conn->lastSendTime = realtime;
 607                         packetsSent++;
 608                         reliableMessagesSent++;
 609                 }
 610
 611                 // if we have an unreliable message to send, do so
 612                 if (data->cursize)
 613                 {
 614                         packetLen = NET_HEADERSIZE + data->cursize;
 615
 616                         if (packetLen > (int)sizeof(sendbuffer))
 617                         {
 618                                 Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize);
 619                                 return -1;
 620                         }
 621
 622                         header = (unsigned int *)sendbuffer;
 623                         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
 624                         header[1] = BigLong(conn->nq.unreliableSendSequence);
 625                         memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
 626
 627                         conn->nq.unreliableSendSequence++;
 628
 629                         NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 630
 631                         packetsSent++;
 632                         unreliableMessagesSent++;
 633                 }
 634                 return 0;
 635         }
 636 }
 637
 638 void NetConn_CloseClientPorts(void)
 639 {
 640         for (;cl_numsockets > 0;cl_numsockets--)
 641                 if (cl_sockets[cl_numsockets - 1])
 642                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 643 }
 644
 645 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
 646 {
 647         lhnetaddress_t address;
 648         lhnetsocket_t *s;
 649         char addressstring2[1024];
 650         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 651         {
 652                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 653                 {
 654                         cl_sockets[cl_numsockets++] = s;
 655                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 656                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
 657                 }
 658                 else
 659                 {
 660                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 661                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 662                 }
 663         }
 664         else
 665                 Con_Printf("Client unable to parse address %s\n", addressstring);
 666 }
 667
 668 void NetConn_OpenClientPorts(void)
 669 {
 670         int port;
 671         NetConn_CloseClientPorts();
 672         port = bound(0, cl_netport.integer, 65535);
 673         if (cl_netport.integer != port)
 674                 Cvar_SetValueQuick(&cl_netport, port);
 675         Con_Printf("Client using port %i\n", port);
 676         NetConn_OpenClientPort("local:2", 0);
 677         NetConn_OpenClientPort(net_address.string, port);
 678         //NetConn_OpenClientPort(net_address_ipv6.string, port);
 679 }
 680
 681 void NetConn_CloseServerPorts(void)
 682 {
 683         for (;sv_numsockets > 0;sv_numsockets--)
 684                 if (sv_sockets[sv_numsockets - 1])
 685                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 686 }
 687
 688 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
 689 {
 690         lhnetaddress_t address;
 691         lhnetsocket_t *s;
 692         int port;
 693         char addressstring2[1024];
 694
 695         for (port = defaultport; port <= defaultport + 100; port++)
 696         {
 697                 if (LHNETADDRESS_FromString(&address, addressstring, port))
 698                 {
 699                         if ((s = LHNET_OpenSocket_Connectionless(&address)))
 700                         {
 701                                 sv_sockets[sv_numsockets++] = s;
 702                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 703                                 Con_Printf("Server listening on address %s\n", addressstring2);
 704                                 break;
 705                         }
 706                         else
 707                         {
 708                                 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 709                                 Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 710                         }
 711                 }
 712                 else
 713                 {
 714                         Con_Printf("Server unable to parse address %s\n", addressstring);
 715                         // if it cant parse one address, it wont be able to parse another for sure
 716                         break;
 717                 }
 718         }
 719 }
 720
 721 void NetConn_OpenServerPorts(int opennetports)
 722 {
 723         int port;
 724         NetConn_CloseServerPorts();
 725         NetConn_UpdateSockets();
 726         port = bound(0, sv_netport.integer, 65535);
 727         if (port == 0)
 728                 port = 26000;
 729         Con_Printf("Server using port %i\n", port);
 730         if (sv_netport.integer != port)
 731                 Cvar_SetValueQuick(&sv_netport, port);
 732         if (cls.state != ca_dedicated)
 733                 NetConn_OpenServerPort("local:1", 0);
 734         if (opennetports)
 735         {
 736                 NetConn_OpenServerPort(net_address.string, port);
 737                 //NetConn_OpenServerPort(net_address_ipv6.string, port);
 738         }
 739         if (sv_numsockets == 0)
 740                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!");
 741 }
 742
 743 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
 744 {
 745         int i, a = LHNETADDRESS_GetAddressType(address);
 746         for (i = 0;i < cl_numsockets;i++)
 747                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
 748                         return cl_sockets[i];
 749         return NULL;
 750 }
 751
 752 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
 753 {
 754         int i, a = LHNETADDRESS_GetAddressType(address);
 755         for (i = 0;i < sv_numsockets;i++)
 756                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
 757                         return sv_sockets[i];
 758         return NULL;
 759 }
 760
 761 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 762 {
 763         netconn_t *conn;
 764         conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn));
 765         conn->mysocket = mysocket;
 766         conn->peeraddress = *peeraddress;
 767         conn->lastMessageTime = realtime;
 768         conn->message.data = conn->messagedata;
 769         conn->message.maxsize = sizeof(conn->messagedata);
 770         conn->message.cursize = 0;
 771         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
 772         // reduce effectiveness of connection request floods
 773         conn->timeout = realtime + net_connecttimeout.value;
 774         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
 775         conn->next = netconn_list;
 776         netconn_list = conn;
 777         return conn;
 778 }
 779
 780 void NetConn_Close(netconn_t *conn)
 781 {
 782         netconn_t *c;
 783         // remove connection from list
 784         if (conn == netconn_list)
 785                 netconn_list = conn->next;
 786         else
 787         {
 788                 for (c = netconn_list;c;c = c->next)
 789                 {
 790                         if (c->next == conn)
 791                         {
 792                                 c->next = conn->next;
 793                                 break;
 794                         }
 795                 }
 796                 // not found in list, we'll avoid crashing here...
 797                 if (!c)
 798                         return;
 799         }
 800         // free connection
 801         Mem_Free(conn);
 802 }
 803
 804 static int clientport = -1;
 805 static int clientport2 = -1;
 806 static int hostport = -1;
 807 void NetConn_UpdateSockets(void)
 808 {
 809         if (cls.state != ca_dedicated)
 810         {
 811                 if (clientport2 != cl_netport.integer)
 812                 {
 813                         clientport2 = cl_netport.integer;
 814                         if (cls.state == ca_connected)
 815                                 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
 816                 }
 817                 if (cls.state == ca_disconnected && clientport != clientport2)
 818                 {
 819                         clientport = clientport2;
 820                         NetConn_CloseClientPorts();
 821                 }
 822                 if (cl_numsockets == 0)
 823                         NetConn_OpenClientPorts();
 824         }
 825
 826         if (hostport != sv_netport.integer)
 827         {
 828                 hostport = sv_netport.integer;
 829                 if (sv.active)
 830                         Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
 831         }
 832 }
 833
 834 static int NetConn_ReceivedMessage(netconn_t *conn, unsigned char *data, int length, protocolversion_t protocol)
 835 {
 836         if (length < 8)
 837                 return 0;
 838
 839         if (protocol == PROTOCOL_QUAKEWORLD)
 840         {
 841                 int sequence, sequence_ack;
 842                 int reliable_ack, reliable_message;
 843                 int count;
 844                 int qport;
 845
 846                 sequence = LittleLong(*((int *)(data + 0)));
 847                 sequence_ack = LittleLong(*((int *)(data + 4)));
 848                 data += 8;
 849                 length -= 8;
 850
 851                 if (conn != cls.netcon)
 852                 {
 853                         // server only
 854                         if (length < 2)
 855                                 return 0;
 856                         // 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?)
 857                         qport = LittleShort(*((int *)(data + 8)));
 858                         data += 2;
 859                         length -= 2;
 860                 }
 861
 862                 packetsReceived++;
 863                 reliable_message = (sequence >> 31) & 1;
 864                 reliable_ack = (sequence_ack >> 31) & 1;
 865                 sequence &= ~(1<<31);
 866                 sequence_ack &= ~(1<<31);
 867                 if (sequence <= conn->qw.incoming_sequence)
 868                 {
 869                         Con_DPrint("Got a stale datagram\n");
 870                         return 0;
 871                 }
 872                 count = sequence - (conn->qw.incoming_sequence + 1);
 873                 if (count > 0)
 874                 {
 875                         droppedDatagrams += count;
 876                         Con_DPrintf("Dropped %u datagram(s)\n", count);
 877                 }
 878                 if (reliable_ack == conn->qw.reliable_sequence)
 879                 {
 880                         // received, now we will be able to send another reliable message
 881                         conn->sendMessageLength = 0;
 882                         reliableMessagesReceived++;
 883                 }
 884                 conn->qw.incoming_sequence = sequence;
 885                 conn->qw.incoming_acknowledged = sequence_ack;
 886                 conn->qw.incoming_reliable_acknowledged = reliable_ack;
 887                 if (reliable_message)
 888                         conn->qw.incoming_reliable_sequence ^= 1;
 889                 conn->lastMessageTime = realtime;
 890                 conn->timeout = realtime + net_messagetimeout.value;
 891                 unreliableMessagesReceived++;
 892                 SZ_Clear(&net_message);
 893                 SZ_Write(&net_message, data, length);
 894                 MSG_BeginReading();
 895                 return 2;
 896         }
 897         else
 898         {
 899                 unsigned int count;
 900                 unsigned int flags;
 901                 unsigned int sequence;
 902                 int qlength;
 903
 904                 qlength = (unsigned int)BigLong(((int *)data)[0]);
 905                 flags = qlength & ~NETFLAG_LENGTH_MASK;
 906                 qlength &= NETFLAG_LENGTH_MASK;
 907                 // control packets were already handled
 908                 if (!(flags & NETFLAG_CTL) && qlength == length)
 909                 {
 910                         sequence = BigLong(((int *)data)[1]);
 911                         packetsReceived++;
 912                         data += 8;
 913                         length -= 8;
 914                         if (flags & NETFLAG_UNRELIABLE)
 915                         {
 916                                 if (sequence >= conn->nq.unreliableReceiveSequence)
 917                                 {
 918                                         if (sequence > conn->nq.unreliableReceiveSequence)
 919                                         {
 920                                                 count = sequence - conn->nq.unreliableReceiveSequence;
 921                                                 droppedDatagrams += count;
 922                                                 Con_DPrintf("Dropped %u datagram(s)\n", count);
 923                                         }
 924                                         conn->nq.unreliableReceiveSequence = sequence + 1;
 925                                         conn->lastMessageTime = realtime;
 926                                         conn->timeout = realtime + net_messagetimeout.value;
 927                                         unreliableMessagesReceived++;
 928                                         if (length > 0)
 929                                         {
 930                                                 SZ_Clear(&net_message);
 931                                                 SZ_Write(&net_message, data, length);
 932                                                 MSG_BeginReading();
 933                                                 return 2;
 934                                         }
 935                                 }
 936                                 else
 937                                         Con_DPrint("Got a stale datagram\n");
 938                                 return 1;
 939                         }
 940                         else if (flags & NETFLAG_ACK)
 941                         {
 942                                 if (sequence == (conn->nq.sendSequence - 1))
 943                                 {
 944                                         if (sequence == conn->nq.ackSequence)
 945                                         {
 946                                                 conn->nq.ackSequence++;
 947                                                 if (conn->nq.ackSequence != conn->nq.sendSequence)
 948                                                         Con_DPrint("ack sequencing error\n");
 949                                                 conn->lastMessageTime = realtime;
 950                                                 conn->timeout = realtime + net_messagetimeout.value;
 951                                                 if (conn->sendMessageLength > MAX_PACKETFRAGMENT)
 952                                                 {
 953                                                         unsigned int packetLen;
 954                                                         unsigned int dataLen;
 955                                                         unsigned int eom;
 956                                                         unsigned int *header;
 957
 958                                                         conn->sendMessageLength -= MAX_PACKETFRAGMENT;
 959                                                         memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
 960
 961                                                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 962                                                         {
 963                                                                 dataLen = conn->sendMessageLength;
 964                                                                 eom = NETFLAG_EOM;
 965                                                         }
 966                                                         else
 967                                                         {
 968                                                                 dataLen = MAX_PACKETFRAGMENT;
 969                                                                 eom = 0;
 970                                                         }
 971
 972                                                         packetLen = NET_HEADERSIZE + dataLen;
 973
 974                                                         header = (unsigned int *)sendbuffer;
 975                                                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 976                                                         header[1] = BigLong(conn->nq.sendSequence);
 977                                                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 978
 979                                                         conn->nq.sendSequence++;
 980
 981                                                         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
 982                                                         {
 983                                                                 conn->lastSendTime = realtime;
 984                                                                 packetsSent++;
 985                                                         }
 986                                                 }
 987                                                 else
 988                                                         conn->sendMessageLength = 0;
 989                                         }
 990                                         else
 991                                                 Con_DPrint("Duplicate ACK received\n");
 992                                 }
 993                                 else
 994                                         Con_DPrint("Stale ACK received\n");
 995                                 return 1;
 996                         }
 997                         else if (flags & NETFLAG_DATA)
 998                         {
 999                                 unsigned int temppacket[2];
1000                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
1001                                 temppacket[1] = BigLong(sequence);
1002                                 NetConn_Write(conn->mysocket, (unsigned char *)temppacket, 8, &conn->peeraddress);
1003                                 if (sequence == conn->nq.receiveSequence)
1004                                 {
1005                                         conn->lastMessageTime = realtime;
1006                                         conn->timeout = realtime + net_messagetimeout.value;
1007                                         conn->nq.receiveSequence++;
1008                                         if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) {
1009                                                 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
1010                                                 conn->receiveMessageLength += length;
1011                                         } else {
1012                                                 Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n"
1013                                                                         "Dropping the message!\n", sequence );
1014                                                 conn->receiveMessageLength = 0;
1015                                                 return 1;
1016                                         }
1017                                         if (flags & NETFLAG_EOM)
1018                                         {
1019                                                 reliableMessagesReceived++;
1020                                                 length = conn->receiveMessageLength;
1021                                                 conn->receiveMessageLength = 0;
1022                                                 if (length > 0)
1023                                                 {
1024                                                         SZ_Clear(&net_message);
1025                                                         SZ_Write(&net_message, conn->receiveMessage, length);
1026                                                         MSG_BeginReading();
1027                                                         return 2;
1028                                                 }
1029                                         }
1030                                 }
1031                                 else
1032                                         receivedDuplicateCount++;
1033                                 return 1;
1034                         }
1035                 }
1036         }
1037         return 0;
1038 }
1039
1040 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol)
1041 {
1042         cls.connect_trying = false;
1043         M_Update_Return_Reason("");
1044         // the connection request succeeded, stop current connection and set up a new connection
1045         CL_Disconnect();
1046         // if we're connecting to a remote server, shut down any local server
1047         if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active)
1048                 Host_ShutdownServer ();
1049         // allocate a net connection to keep track of things
1050         cls.netcon = NetConn_Open(mysocket, peeraddress);
1051         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
1052         key_dest = key_game;
1053         m_state = m_none;
1054         cls.demonum = -1;                       // not in the demo loop now
1055         cls.state = ca_connected;
1056         cls.signon = 0;                         // need all the signon messages before playing
1057         cls.protocol = initialprotocol;
1058         if (cls.protocol == PROTOCOL_QUAKEWORLD)
1059                 Cmd_ForwardStringToServer("new");
1060 }
1061
1062 int NetConn_IsLocalGame(void)
1063 {
1064         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
1065                 return true;
1066         return false;
1067 }
1068
1069 static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1070 {
1071         qboolean fromserver;
1072         int ret, c, control;
1073         const char *s;
1074         char *string, addressstring2[128], cname[128], ipstring[32];
1075         char stringbuf[16384];
1076
1077         // quakeworld ingame packet
1078         fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress);
1079
1080         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1081         {
1082                 // received a command string - strip off the packaging and put it
1083                 // into our string buffer with NULL termination
1084                 data += 4;
1085                 length -= 4;
1086                 length = min(length, (int)sizeof(stringbuf) - 1);
1087                 memcpy(stringbuf, data, length);
1088                 stringbuf[length] = 0;
1089                 string = stringbuf;
1090
1091                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1092
1093                 if (developer_networking.integer)
1094                 {
1095                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
1096                         Com_HexDumpToConsole(data, length);
1097                 }
1098
1099                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
1100                 {
1101                         // darkplaces or quake3
1102                         char protocolnames[1400];
1103                         Protocol_Names(protocolnames, sizeof(protocolnames));
1104                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
1105                         M_Update_Return_Reason("Got challenge response");
1106                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s\\challenge\\%s", protocolnames, string + 10), peeraddress);
1107                         return true;
1108                 }
1109                 if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')))
1110                 {
1111                         // quakeworld
1112                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1113                         Con_Printf("\"%s\" received, sending QuakeWorld connect request back to %s\n", string, addressstring2);
1114                         M_Update_Return_Reason("Got QuakeWorld challenge response");
1115                         cls.qw_qport = qport.integer;
1116                         NetConn_WriteString(mysocket, va("\377\377\377\377connect 28 %i %i \"%s\"\n", cls.qw_qport, atoi(string + 1), cls.userinfo), peeraddress);
1117                 }
1118                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
1119                 {
1120                         // darkplaces or quake3
1121                         M_Update_Return_Reason("Accepted");
1122                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3);
1123                         return true;
1124                 }
1125                 if (length > 1 && string[0] == 'j' && cls.connect_trying)
1126                 {
1127                         // quakeworld
1128                         M_Update_Return_Reason("QuakeWorld Accepted");
1129                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
1130                         return true;
1131                 }
1132                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
1133                 {
1134                         char rejectreason[32];
1135                         cls.connect_trying = false;
1136                         string += 7;
1137                         length = max(length - 7, (int)sizeof(rejectreason) - 1);
1138                         memcpy(rejectreason, string, length);
1139                         rejectreason[length] = 0;
1140                         M_Update_Return_Reason(rejectreason);
1141                         return true;
1142                 }
1143                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
1144                 {
1145                         serverlist_info_t *info;
1146                         int n;
1147                         double pingtime;
1148
1149                         string += 13;
1150                         // serverlist only uses text addresses
1151                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
1152                         // search the cache for this server and update it
1153                         for( n = 0; n < serverlist_cachecount; n++ )
1154                                 if( !strcmp( cname, serverlist_cache[n].info.cname ) )
1155                                         break;
1156                         if( n == serverlist_cachecount ) {
1157                                 // LAN search doesnt require an answer from the master server so we wont
1158                                 // know the ping nor will it be initialized already...
1159
1160                                 // find a slot
1161                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1162                                         return true;
1163
1164                                 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1165                                 // store the data the engine cares about (address and ping)
1166                                 strlcpy (serverlist_cache[serverlist_cachecount].info.cname, cname, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1167                                 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1168                                 //serverlist_cache[serverlist_cachecount].querytime = realtime;
1169                                 serverlist_cache[serverlist_cachecount].querytime = Sys_DoubleTime();
1170                                 // if not in the slist menu we should print the server to console
1171                                 if (serverlist_consoleoutput) {
1172                                         Con_Printf("querying %s\n", ipstring);
1173                                 }
1174
1175                                 ++serverlist_cachecount;
1176                         }
1177
1178                         info = &serverlist_cache[n].info;
1179                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(info->game, s, sizeof (info->game));else info->game[0] = 0;
1180                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
1181                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
1182                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1183                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) info->protocol = atoi(s);else info->protocol = -1;
1184                         if ((s = SearchInfostring(string, "clients"      )) != NULL) info->numplayers = atoi(s);else info->numplayers = 0;
1185                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
1186
1187                         if (info->ping == 100000)
1188                                         serverreplycount++;
1189
1190                         pingtime = (int)((Sys_DoubleTime() - serverlist_cache[n].querytime) * 1000.0 + 0.5);
1191                         pingtime = bound(0, pingtime, 9999);
1192                         // update the ping
1193                         info->ping = pingtime;
1194
1195                         // legacy/old stuff move it to the menu ASAP
1196
1197                         // build description strings for the things users care about
1198                         dpsnprintf(serverlist_cache[n].line1, sizeof(serverlist_cache[n].line1), "^%c%5d^7 ^%c%3u^7/%3u %-65.65s", pingtime >= 300 ? '1' : (pingtime >= 200 ? '3' : '7'), (int)pingtime, ((info->numplayers > 0 && info->numplayers < info->maxplayers) ? (info->numplayers >= 4 ? '7' : '3') : '1'), info->numplayers, info->maxplayers, info->name);
1199                         dpsnprintf(serverlist_cache[n].line2, sizeof(serverlist_cache[n].line2), "^5%-21.21s %-19.19s %-17.17s %-20.20s", info->cname, info->game, info->mod, info->map);
1200                         if( serverlist_cache[n].query == SQS_QUERIED ) {
1201                                 ServerList_ViewList_Remove( &serverlist_cache[n] );
1202                         }
1203                         // if not in the slist menu we should print the server to console (if wanted)
1204                         else if( serverlist_consoleoutput )
1205                                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1206                         // and finally, update the view set
1207                         ServerList_ViewList_Insert( &serverlist_cache[n] );
1208                         serverlist_cache[n].query = SQS_QUERIED;
1209
1210                         return true;
1211                 }
1212                 if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1213                 {
1214                         // Extract the IP addresses
1215                         data += 18;
1216                         length -= 18;
1217                         masterreplycount++;
1218                         if (serverlist_consoleoutput)
1219                                 Con_Print("received DarkPlaces server list...\n");
1220                         while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
1221                         {
1222                                 int n;
1223
1224                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], data[5] * 256 + data[6]);
1225                                 if (serverlist_consoleoutput && developer_networking.integer)
1226                                         Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring);
1227                                 // ignore the rest of the message if the serverlist is full
1228                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1229                                         break;
1230                                 // also ignore it if we have already queried it (other master server response)
1231                                 for( n = 0 ; n < serverlist_cachecount ; n++ )
1232                                         if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1233                                                 break;
1234                                 if( n >= serverlist_cachecount )
1235                                 {
1236                                         serverquerycount++;
1237
1238                                         memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1239                                         serverlist_cache[serverlist_cachecount].protocol = PROTOCOL_DARKPLACES7;
1240                                         // store the data the engine cares about (address and ping)
1241                                         strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1242                                         serverlist_cache[serverlist_cachecount].info.ping = 100000;
1243                                         serverlist_cache[serverlist_cachecount].query = SQS_QUERYING;
1244
1245                                         ++serverlist_cachecount;
1246                                 }
1247
1248                                 // move on to next address in packet
1249                                 data += 7;
1250                                 length -= 7;
1251                         }
1252                         // begin or resume serverlist queries
1253                         serverlist_querysleep = false;
1254                         serverlist_querywaittime = realtime + 3;
1255                         return true;
1256                 }
1257                 if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1258                 {
1259                         // Extract the IP addresses
1260                         data += 2;
1261                         length -= 2;
1262                         masterreplycount++;
1263                         if (serverlist_consoleoutput)
1264                                 Con_Print("received QuakeWorld server list...\n");
1265                         while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0)
1266                         {
1267                                 int n;
1268
1269                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]);
1270                                 if (serverlist_consoleoutput && developer_networking.integer)
1271                                         Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring);
1272                                 // ignore the rest of the message if the serverlist is full
1273                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1274                                         break;
1275                                 // also ignore it if we have already queried it (other master server response)
1276                                 for( n = 0 ; n < serverlist_cachecount ; n++ )
1277                                         if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1278                                                 break;
1279                                 if( n >= serverlist_cachecount )
1280                                 {
1281                                         serverquerycount++;
1282
1283                                         memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1284                                         serverlist_cache[serverlist_cachecount].protocol = PROTOCOL_QUAKEWORLD;
1285                                         // store the data the engine cares about (address and ping)
1286                                         strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1287                                         serverlist_cache[serverlist_cachecount].info.ping = 100000;
1288                                         serverlist_cache[serverlist_cachecount].query = SQS_QUERYING;
1289
1290                                         ++serverlist_cachecount;
1291                                 }
1292
1293                                 // move on to next address in packet
1294                                 data += 6;
1295                                 length -= 6;
1296                         }
1297                         // begin or resume serverlist queries
1298                         serverlist_querysleep = false;
1299                         serverlist_querywaittime = realtime + 3;
1300                         return true;
1301                 }
1302                 /*
1303                 if (!strncmp(string, "ping", 4))
1304                 {
1305                         if (developer.integer)
1306                                 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1307                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1308                         return true;
1309                 }
1310                 if (!strncmp(string, "ack", 3))
1311                         return true;
1312                 */
1313                 // QuakeWorld compatibility
1314                 if (length >= 1 && string[0] == 'j' && cls.connect_trying)
1315                 {
1316                         // accept message
1317                         M_Update_Return_Reason("Accepted");
1318                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
1319                         return true;
1320                 }
1321                 if (length > 1 && string[0] == 'c' && string[1] >= '0' && string[1] <= '9' && cls.connect_trying)
1322                 {
1323                         // challenge message
1324                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1325                         Con_Printf("challenge %s received, sending connect request back to %s\n", string + 1, addressstring2);
1326                         M_Update_Return_Reason("Got challenge response");
1327                         cls.qw_qport = qport.integer;
1328                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1329                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "name", cl_name.string);
1330                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "topcolor", va("%i", (cl_color.integer >> 4) & 15));
1331                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "bottomcolor", va("%i", (cl_color.integer) & 15));
1332                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "rate", va("%i", cl_rate.integer));
1333                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "msg", "1");
1334                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ver", engineversion);
1335                         NetConn_WriteString(mysocket, va("\377\377\377\377connect %i %i %i \"%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo), peeraddress);
1336                         return true;
1337                 }
1338                 if (length > 2 && !memcmp(string, "n\\", 2))
1339                 {
1340                         serverlist_info_t *info;
1341                         int n;
1342                         double pingtime;
1343
1344                         // qw server status
1345                         if (serverlist_consoleoutput && developer_networking.integer >= 2)
1346                                 Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1);
1347
1348                         string += 1;
1349                         // serverlist only uses text addresses
1350                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
1351                         // search the cache for this server and update it
1352                         for( n = 0; n < serverlist_cachecount; n++ )
1353                                 if( !strcmp( cname, serverlist_cache[n].info.cname ) )
1354                                         break;
1355                         if( n == serverlist_cachecount ) {
1356                                 // LAN search doesnt require an answer from the master server so we wont
1357                                 // know the ping nor will it be initialized already...
1358
1359                                 // find a slot
1360                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1361                                         return true;
1362
1363                                 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1364                                 // store the data the engine cares about (address and ping)
1365                                 strlcpy (serverlist_cache[serverlist_cachecount].info.cname, cname, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1366                                 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1367                                 //serverlist_cache[serverlist_cachecount].querytime = realtime;
1368                                 serverlist_cache[serverlist_cachecount].querytime = Sys_DoubleTime();
1369                                 // if not in the slist menu we should print the server to console
1370                                 if (serverlist_consoleoutput) {
1371                                         Con_Printf("querying %s\n", ipstring);
1372                                 }
1373
1374                                 ++serverlist_cachecount;
1375                         }
1376
1377                         info = &serverlist_cache[n].info;
1378                         if ((s = SearchInfostring(string, "*gamedir"     )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
1379                         if ((s = SearchInfostring(string, "map"          )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
1380                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1381                         if ((s = SearchInfostring(string, "maxclients"   )) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
1382                         strlcpy(info->game, "QuakeWorld", sizeof(info->game));;
1383                         info->protocol = 0;
1384                         info->numplayers = 0; // updated below
1385
1386                         // count active players on server
1387                         // (we could gather more info, but we're just after the number)
1388                         s = strchr(string, '\n');
1389                         if (s)
1390                         {
1391                                 s++;
1392                                 while (s < string + length)
1393                                 {
1394                                         for (;s < string + length && *s != '\n';s++)
1395                                                 ;
1396                                         if (s >= string + length)
1397                                                 break;
1398                                         info->numplayers++;
1399                                         s++;
1400                                 }
1401                         }
1402
1403                         if (info->ping == 100000)
1404                                         serverreplycount++;
1405
1406                         pingtime = (int)((Sys_DoubleTime() - serverlist_cache[n].querytime) * 1000.0 + 0.5);
1407                         pingtime = bound(0, pingtime, 9999);
1408                         // update the ping
1409                         info->ping = pingtime;
1410
1411                         // legacy/old stuff move it to the menu ASAP
1412
1413                         // build description strings for the things users care about
1414                         dpsnprintf(serverlist_cache[n].line1, sizeof(serverlist_cache[n].line1), "^%c%5d^7 ^%c%3u^7/%3u %-65.65s", pingtime >= 300 ? '1' : (pingtime >= 200 ? '3' : '7'), (int)pingtime, ((info->numplayers > 0 && info->numplayers < info->maxplayers) ? (info->numplayers >= 4 ? '7' : '3') : '1'), info->numplayers, info->maxplayers, info->name);
1415                         dpsnprintf(serverlist_cache[n].line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s %-17.17s %-20.20s", info->cname, info->game, info->mod, info->map);
1416                         if( serverlist_cache[n].query == SQS_QUERIED ) {
1417                                 ServerList_ViewList_Remove( &serverlist_cache[n] );
1418                         }
1419                         // if not in the slist menu we should print the server to console (if wanted)
1420                         else if( serverlist_consoleoutput )
1421                                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1422                         // and finally, update the view set
1423                         ServerList_ViewList_Insert( &serverlist_cache[n] );
1424                         serverlist_cache[n].query = SQS_QUERIED;
1425
1426                         return true;
1427                 }
1428                 if (string[0] == 'n')
1429                 {
1430                         // qw print command
1431                         Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1);
1432                 }
1433                 // we may not have liked the packet, but it was a command packet, so
1434                 // we're done processing this packet now
1435                 return true;
1436         }
1437         // quakeworld ingame packet
1438         if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol)) == 2)
1439         {
1440                 ret = 0;
1441                 CL_ParseServerMessage();
1442                 return ret;
1443         }
1444         // netquake control packets, supported for compatibility only
1445         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1446         {
1447                 c = data[4];
1448                 data += 5;
1449                 length -= 5;
1450                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1451                 switch (c)
1452                 {
1453                 case CCREP_ACCEPT:
1454                         if (developer.integer)
1455                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
1456                         if (cls.connect_trying)
1457                         {
1458                                 lhnetaddress_t clientportaddress;
1459                                 clientportaddress = *peeraddress;
1460                                 if (length >= 4)
1461                                 {
1462                                         unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
1463                                         data += 4;
1464                                         length -= 4;
1465                                         LHNETADDRESS_SetPort(&clientportaddress, port);
1466                                 }
1467                                 M_Update_Return_Reason("Accepted");
1468                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE);
1469                         }
1470                         break;
1471                 case CCREP_REJECT:
1472                         if (developer.integer)
1473                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
1474                         cls.connect_trying = false;
1475                         M_Update_Return_Reason((char *)data);
1476                         break;
1477 #if 0
1478                 case CCREP_SERVER_INFO:
1479                         if (developer.integer)
1480                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
1481                         if (cls.state != ca_dedicated)
1482                         {
1483                                 // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address
1484                                 // string we just ignore it and keep the real address
1485                                 MSG_ReadString();
1486                                 // serverlist only uses text addresses
1487                                 cname = UDP_AddrToString(readaddr);
1488                                 // search the cache for this server
1489                                 for (n = 0; n < hostCacheCount; n++)
1490                                         if (!strcmp(cname, serverlist[n].cname))
1491                                                 break;
1492                                 // add it
1493                                 if (n == hostCacheCount && hostCacheCount < SERVERLISTSIZE)
1494                                 {
1495                                         hostCacheCount++;
1496                                         memset(&serverlist[n], 0, sizeof(serverlist[n]));
1497                                         strlcpy (serverlist[n].name, MSG_ReadString(), sizeof (serverlist[n].name));
1498                                         strlcpy (serverlist[n].map, MSG_ReadString(), sizeof (serverlist[n].map));
1499                                         serverlist[n].users = MSG_ReadByte();
1500                                         serverlist[n].maxusers = MSG_ReadByte();
1501                                         c = MSG_ReadByte();
1502                                         if (c != NET_PROTOCOL_VERSION)
1503                                         {
1504                                                 strlcpy (serverlist[n].cname, serverlist[n].name, sizeof (serverlist[n].cname));
1505                                                 strcpy(serverlist[n].name, "*");
1506                                                 strlcat (serverlist[n].name, serverlist[n].cname, sizeof(serverlist[n].name));
1507                                         }
1508                                         strlcpy (serverlist[n].cname, cname, sizeof (serverlist[n].cname));
1509                                 }
1510                         }
1511                         break;
1512                 case CCREP_PLAYER_INFO:
1513                         // we got a CCREP_PLAYER_INFO??
1514                         //if (developer.integer)
1515                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
1516                         break;
1517                 case CCREP_RULE_INFO:
1518                         // we got a CCREP_RULE_INFO??
1519                         //if (developer.integer)
1520                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
1521                         break;
1522 #endif
1523                 default:
1524                         break;
1525                 }
1526                 // we may not have liked the packet, but it was a valid control
1527                 // packet, so we're done processing this packet now
1528                 return true;
1529         }
1530         ret = 0;
1531         if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol)) == 2)
1532                 CL_ParseServerMessage();
1533         return ret;
1534 }
1535
1536 void NetConn_QueryQueueFrame(void)
1537 {
1538         int index;
1539         int queries;
1540         int maxqueries;
1541         double timeouttime;
1542         static double querycounter = 0;
1543
1544         if (serverlist_querysleep)
1545                 return;
1546
1547         // apply a cool down time after master server replies,
1548         // to avoid messing up the ping times on the servers
1549         if (serverlist_querywaittime > realtime)
1550                 return;
1551
1552         // each time querycounter reaches 1.0 issue a query
1553         querycounter += host_realframetime * net_slist_queriespersecond.value;
1554         maxqueries = (int)querycounter;
1555         maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer);
1556         querycounter -= maxqueries;
1557
1558         if( maxqueries == 0 ) {
1559                 return;
1560         }
1561
1562         // scan serverlist and issue queries as needed
1563     serverlist_querysleep = true;
1564
1565         timeouttime = realtime - net_slist_timeout.value;
1566         for( index = 0, queries = 0 ; index < serverlist_cachecount && queries < maxqueries ; index++ )
1567         {
1568                 serverlist_entry_t *entry = &serverlist_cache[ index ];
1569                 if( entry->query != SQS_QUERYING )
1570                 {
1571                         continue;
1572                 }
1573
1574         serverlist_querysleep = false;
1575                 if( entry->querycounter != 0 && entry->querytime > timeouttime )
1576                 {
1577                         continue;
1578                 }
1579
1580                 if( entry->querycounter != (unsigned) net_slist_maxtries.integer )
1581                 {
1582                         lhnetaddress_t address;
1583                         int socket;
1584
1585                         LHNETADDRESS_FromString(&address, entry->info.cname, 0);
1586                         if (entry->protocol == PROTOCOL_QUAKEWORLD)
1587                         {
1588                                 for (socket = 0; socket < cl_numsockets ; socket++)
1589                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address);
1590                         }
1591                         else
1592                         {
1593                                 for (socket = 0; socket < cl_numsockets ; socket++)
1594                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getinfo", &address);
1595                         }
1596
1597                         //entry->querytime = realtime;
1598                         entry->querytime = Sys_DoubleTime();
1599                         entry->querycounter++;
1600
1601                         // if not in the slist menu we should print the server to console
1602                         if (serverlist_consoleoutput)
1603                                 Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter);
1604
1605                         queries++;
1606                 }
1607                 else
1608                 {
1609                         entry->query = SQS_TIMEDOUT;
1610                 }
1611         }
1612 }
1613
1614 void NetConn_ClientFrame(void)
1615 {
1616         int i, length;
1617         lhnetaddress_t peeraddress;
1618         NetConn_UpdateSockets();
1619         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
1620         {
1621                 if (cls.connect_remainingtries == 0)
1622                         M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
1623                 cls.connect_nextsendtime = realtime + 1;
1624                 cls.connect_remainingtries--;
1625                 if (cls.connect_remainingtries <= -10)
1626                 {
1627                         cls.connect_trying = false;
1628                         M_Update_Return_Reason("Connect: Failed");
1629                         return;
1630                 }
1631                 // try challenge first (newer DP server or QW)
1632                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
1633                 // then try netquake as a fallback (old server, or netquake)
1634                 SZ_Clear(&net_message);
1635                 // save space for the header, filled in later
1636                 MSG_WriteLong(&net_message, 0);
1637                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
1638                 MSG_WriteString(&net_message, "QUAKE");
1639                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1640                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1641                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
1642                 SZ_Clear(&net_message);
1643         }
1644         for (i = 0;i < cl_numsockets;i++)
1645                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1646                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
1647         NetConn_QueryQueueFrame();
1648         if (cls.netcon && realtime > cls.netcon->timeout)
1649         {
1650                 Con_Print("Connection timed out\n");
1651                 CL_Disconnect();
1652                 Host_ShutdownServer ();
1653         }
1654 }
1655
1656 #define MAX_CHALLENGES 128
1657 struct challenge_s
1658 {
1659         lhnetaddress_t address;
1660         double time;
1661         char string[12];
1662 }
1663 challenge[MAX_CHALLENGES];
1664
1665 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
1666 {
1667         int i;
1668         char c;
1669         for (i = 0;i < bufferlength - 1;i++)
1670         {
1671                 do
1672                 {
1673                         c = rand () % (127 - 33) + 33;
1674                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
1675                 buffer[i] = c;
1676         }
1677         buffer[i] = 0;
1678 }
1679
1680 static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus)
1681 {
1682         unsigned int nb_clients = 0, i;
1683         int length;
1684
1685         // How many clients are there?
1686         for (i = 0;i < (unsigned int)svs.maxclients;i++)
1687                 if (svs.clients[i].active)
1688                         nb_clients++;
1689
1690         // TODO: we should add more information for the full status string
1691         length = dpsnprintf(out_msg, out_size,
1692                                                 "\377\377\377\377%s\x0A"
1693                                                 "\\gamename\\%s\\modname\\%s\\sv_maxclients\\%d"
1694                                                 "\\clients\\%d\\mapname\\%s\\hostname\\%s""\\protocol\\%d"
1695                                                 "%s%s"
1696                                                 "%s",
1697                                                 fullstatus ? "statusResponse" : "infoResponse",
1698                                                 gamename, com_modname, svs.maxclients,
1699                                                 nb_clients, sv.name, hostname.string, NET_PROTOCOL_VERSION,
1700                                                 challenge ? "\\challenge\\" : "", challenge ? challenge : "",
1701                                                 fullstatus ? "\n" : "");
1702
1703         // Make sure it fits in the buffer
1704         if (length < 0)
1705                 return false;
1706
1707         if (fullstatus)
1708         {
1709                 char *ptr;
1710                 int left;
1711
1712                 ptr = out_msg + length;
1713                 left = (int)out_size - length;
1714
1715                 for (i = 0;i < (unsigned int)svs.maxclients;i++)
1716                 {
1717                         client_t *cl = &svs.clients[i];
1718                         if (cl->active)
1719                         {
1720                                 int nameind, cleanind;
1721                                 char curchar;
1722                                 char cleanname [sizeof(cl->name)];
1723
1724                                 // Remove all characters '"' and '\' in the player name
1725                                 nameind = 0;
1726                                 cleanind = 0;
1727                                 do
1728                                 {
1729                                         curchar = cl->name[nameind++];
1730                                         if (curchar != '"' && curchar != '\\')
1731                                         {
1732                                                 cleanname[cleanind++] = curchar;
1733                                                 if (cleanind == sizeof(cleanname) - 1)
1734                                                         break;
1735                                         }
1736                                 } while (curchar != '\0');
1737
1738                                 length = dpsnprintf(ptr, left, "%d %d \"%s\"\n",
1739                                                                         cl->frags,
1740                                                                         (int)(cl->ping * 1000.0f),
1741                                                                         cleanname);
1742                                 if(length < 0)
1743                                         return false;
1744                                 left -= length;
1745                                 ptr += length;
1746                         }
1747                 }
1748         }
1749
1750         return true;
1751 }
1752
1753 extern void SV_SendServerinfo (client_t *client);
1754 static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1755 {
1756         int i, ret, clientnum, best;
1757         double besttime;
1758         client_t *client;
1759         netconn_t *conn;
1760         char *s, *string, response[1400], addressstring2[128], stringbuf[16384];
1761
1762         // see if we can identify the sender as a local player
1763         // (this is necessary for rcon to send a reliable reply if the client is
1764         //  actually on the server, not sending remotely)
1765         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1766                 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1767                         break;
1768         if (i == svs.maxclients)
1769                 host_client = NULL;
1770
1771         if (sv.active)
1772         {
1773                 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1774                 {
1775                         // received a command string - strip off the packaging and put it
1776                         // into our string buffer with NULL termination
1777                         data += 4;
1778                         length -= 4;
1779                         length = min(length, (int)sizeof(stringbuf) - 1);
1780                         memcpy(stringbuf, data, length);
1781                         stringbuf[length] = 0;
1782                         string = stringbuf;
1783
1784                         if (developer.integer)
1785                         {
1786                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1787                                 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1788                                 Com_HexDumpToConsole(data, length);
1789                         }
1790
1791                         if (length >= 12 && !memcmp(string, "getchallenge", 12))
1792                         {
1793                                 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1794                                 {
1795                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1796                                                 break;
1797                                         if (besttime > challenge[i].time)
1798                                                 besttime = challenge[best = i].time;
1799                                 }
1800                                 // if we did not find an exact match, choose the oldest and
1801                                 // update address and string
1802                                 if (i == MAX_CHALLENGES)
1803                                 {
1804                                         i = best;
1805                                         challenge[i].address = *peeraddress;
1806                                         NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1807                                 }
1808                                 challenge[i].time = realtime;
1809                                 // send the challenge
1810                                 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1811                                 return true;
1812                         }
1813                         if (length > 8 && !memcmp(string, "connect\\", 8))
1814                         {
1815                                 string += 7;
1816                                 length -= 7;
1817                                 if ((s = SearchInfostring(string, "challenge")))
1818                                 {
1819                                         // validate the challenge
1820                                         for (i = 0;i < MAX_CHALLENGES;i++)
1821                                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1822                                                         break;
1823                                         if (i < MAX_CHALLENGES)
1824                                         {
1825                                                 // check engine protocol
1826                                                 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1827                                                 {
1828                                                         if (developer.integer)
1829                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1830                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1831                                                 }
1832                                                 else
1833                                                 {
1834                                                         // see if this is a duplicate connection request
1835                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1836                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1837                                                                         break;
1838                                                         if (clientnum < svs.maxclients && realtime - client->connecttime < net_messagerejointimeout.value)
1839                                                         {
1840                                                                 // client is still trying to connect,
1841                                                                 // so we send a duplicate reply
1842                                                                 if (developer.integer)
1843                                                                         Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1844                                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1845                                                         }
1846 #if 0
1847                                                         else if (clientnum < svs.maxclients)
1848                                                         {
1849                                                                 if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1850                                                                 {
1851                                                                         // client crashed and is coming back, keep their stuff intact
1852                                                                         SV_SendServerinfo(client);
1853                                                                         //host_client = client;
1854                                                                         //SV_DropClient (true);
1855                                                                 }
1856                                                                 // else ignore them
1857                                                         }
1858 #endif
1859                                                         else
1860                                                         {
1861                                                                 // this is a new client, find a slot
1862                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1863                                                                         if (!client->active)
1864                                                                                 break;
1865                                                                 if (clientnum < svs.maxclients)
1866                                                                 {
1867                                                                         // prepare the client struct
1868                                                                         if ((conn = NetConn_Open(mysocket, peeraddress)))
1869                                                                         {
1870                                                                                 // allocated connection
1871                                                                                 LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true);
1872                                                                                 if (developer.integer)
1873                                                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1874                                                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1875                                                                                 // now set up the client
1876                                                                                 SV_VM_Begin();
1877                                                                                 SV_ConnectClient(clientnum, conn);
1878                                                                                 SV_VM_End();
1879                                                                                 NetConn_Heartbeat(1);
1880                                                                         }
1881                                                                 }
1882                                                                 else
1883                                                                 {
1884                                                                         // server is full
1885                                                                         if (developer.integer)
1886                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1887                                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1888                                                                 }
1889                                                         }
1890                                                 }
1891                                         }
1892                                 }
1893                                 return true;
1894                         }
1895                         if (length >= 7 && !memcmp(string, "getinfo", 7))
1896                         {
1897                                 const char *challenge = NULL;
1898
1899                                 // If there was a challenge in the getinfo message
1900                                 if (length > 8 && string[7] == ' ')
1901                                         challenge = string + 8;
1902
1903                                 if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false))
1904                                 {
1905                                         if (developer.integer)
1906                                                 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1907                                         NetConn_WriteString(mysocket, response, peeraddress);
1908                                 }
1909                                 return true;
1910                         }
1911                         if (length >= 9 && !memcmp(string, "getstatus", 9))
1912                         {
1913                                 const char *challenge = NULL;
1914
1915                                 // If there was a challenge in the getinfo message
1916                                 if (length > 10 && string[9] == ' ')
1917                                         challenge = string + 10;
1918
1919                                 if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true))
1920                                 {
1921                                         if (developer.integer)
1922                                                 Con_Printf("Sending reply to client %s - %s\n", addressstring2, response);
1923                                         NetConn_WriteString(mysocket, response, peeraddress);
1924                                 }
1925                                 return true;
1926                         }
1927                         if (length >= 5 && !memcmp(string, "rcon ", 5))
1928                         {
1929                                 int i;
1930                                 char *s = string + 5;
1931                                 char password[64];
1932                                 for (i = 0;*s > ' ';s++)
1933                                         if (i < (int)sizeof(password) - 1)
1934                                                 password[i++] = *s;
1935                                 password[i] = 0;
1936                                 if (password[0] > ' ' && !strcmp(rcon_password.string, password))
1937                                 {
1938                                         // looks like a legitimate rcon command with the correct password
1939                                         Con_Printf("server received rcon command from %s:\n%s\n", host_client ? host_client->name : addressstring2, s);
1940                                         rcon_redirect = true;
1941                                         rcon_redirect_bufferpos = 0;
1942                                         Cmd_ExecuteString(s, src_command);
1943                                         rcon_redirect_buffer[rcon_redirect_bufferpos] = 0;
1944                                         rcon_redirect = false;
1945                                         // print resulting text to client
1946                                         // if client is playing, send a reliable reply instead of
1947                                         // a command packet
1948                                         if (host_client)
1949                                         {
1950                                                 // if the netconnection is loop, then this is the
1951                                                 // local player on a listen mode server, and it would
1952                                                 // result in duplicate printing to the console
1953                                                 // (not that the local player should be using rcon
1954                                                 //  when they have the console)
1955                                                 if (host_client->netconnection && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
1956                                                         SV_ClientPrintf("%s", rcon_redirect_buffer);
1957                                         }
1958                                         else
1959                                         {
1960                                                 // qw print command
1961                                                 dpsnprintf(response, sizeof(response), "\377\377\377\377n%s", rcon_redirect_buffer);
1962                                                 NetConn_WriteString(mysocket, response, peeraddress);
1963                                         }
1964                                 }
1965                                 return true;
1966                         }
1967                         /*
1968                         if (!strncmp(string, "ping", 4))
1969                         {
1970                                 if (developer.integer)
1971                                         Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1972                                 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1973                                 return true;
1974                         }
1975                         if (!strncmp(string, "ack", 3))
1976                                 return true;
1977                         */
1978                         // we may not have liked the packet, but it was a command packet, so
1979                         // we're done processing this packet now
1980                         return true;
1981                 }
1982                 // LordHavoc: disabled netquake control packet support in server
1983 #if 0
1984                 {
1985                         int c, control;
1986                         // netquake control packets, supported for compatibility only
1987                         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1988                         {
1989                                 c = data[4];
1990                                 data += 5;
1991                                 length -= 5;
1992                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1993                                 switch (c)
1994                                 {
1995                                 case CCREQ_CONNECT:
1996                                         //if (developer.integer)
1997                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
1998                                         if (length >= (int)strlen("QUAKE") + 1 + 1)
1999                                         {
2000                                                 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
2001                                                 {
2002                                                         if (developer.integer)
2003                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
2004                                                         SZ_Clear(&net_message);
2005                                                         // save space for the header, filled in later
2006                                                         MSG_WriteLong(&net_message, 0);
2007                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
2008                                                         MSG_WriteString(&net_message, "Incompatible version.\n");
2009                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2010                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2011                                                         SZ_Clear(&net_message);
2012                                                 }
2013                                                 else
2014                                                 {
2015                                                         // see if this is a duplicate connection request
2016                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2017                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
2018                                                                         break;
2019                                                         if (clientnum < svs.maxclients)
2020                                                         {
2021                                                                 // duplicate connection request
2022                                                                 if (realtime - client->connecttime < 2.0)
2023                                                                 {
2024                                                                         // client is still trying to connect,
2025                                                                         // so we send a duplicate reply
2026                                                                         if (developer.integer)
2027                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
2028                                                                         SZ_Clear(&net_message);
2029                                                                         // save space for the header, filled in later
2030                                                                         MSG_WriteLong(&net_message, 0);
2031                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
2032                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
2033                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2034                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2035                                                                         SZ_Clear(&net_message);
2036                                                                 }
2037 #if 0
2038                                                                 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
2039                                                                 {
2040                                                                         SV_SendServerinfo(client);
2041                                                                         // the old client hasn't sent us anything
2042                                                                         // in quite a while, so kick off and let
2043                                                                         // the retry take care of it...
2044                                                                         //host_client = client;
2045                                                                         //SV_DropClient (true);
2046                                                                 }
2047 #endif
2048                                                         }
2049                                                         else
2050                                                         {
2051                                                                 // this is a new client, find a slot
2052                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2053                                                                         if (!client->active)
2054                                                                                 break;
2055                                                                 if (clientnum < svs.maxclients && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
2056                                                                 {
2057                                                                         // connect to the client
2058                                                                         // everything is allocated, just fill in the details
2059                                                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
2060                                                                         if (developer.integer)
2061                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
2062                                                                         // send back the info about the server connection
2063                                                                         SZ_Clear(&net_message);
2064                                                                         // save space for the header, filled in later
2065                                                                         MSG_WriteLong(&net_message, 0);
2066                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
2067                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
2068                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2069                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2070                                                                         SZ_Clear(&net_message);
2071                                                                         // now set up the client struct
2072                                                                         SV_VM_Begin();
2073                                                                         SV_ConnectClient(clientnum, conn);
2074                                                                         SV_VM_End();
2075                                                                         NetConn_Heartbeat(1);
2076                                                                 }
2077                                                                 else
2078                                                                 {
2079                                                                         //if (developer.integer)
2080                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
2081                                                                         // no room; try to let player know
2082                                                                         SZ_Clear(&net_message);
2083                                                                         // save space for the header, filled in later
2084                                                                         MSG_WriteLong(&net_message, 0);
2085                                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
2086                                                                         MSG_WriteString(&net_message, "Server is full.\n");
2087                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2088                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2089                                                                         SZ_Clear(&net_message);
2090                                                                 }
2091                                                         }
2092                                                 }
2093                                         }
2094                                         break;
2095 #if 0
2096                                 case CCREQ_SERVER_INFO:
2097                                         if (developer.integer)
2098                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
2099                                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
2100                                         {
2101                                                 if (developer.integer)
2102                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
2103                                                 SZ_Clear(&net_message);
2104                                                 // save space for the header, filled in later
2105                                                 MSG_WriteLong(&net_message, 0);
2106                                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
2107                                                 UDP_GetSocketAddr(UDP_acceptSock, &newaddr);
2108                                                 MSG_WriteString(&net_message, UDP_AddrToString(&newaddr));
2109                                                 MSG_WriteString(&net_message, hostname.string);
2110                                                 MSG_WriteString(&net_message, sv.name);
2111                                                 MSG_WriteByte(&net_message, net_activeconnections);
2112                                                 MSG_WriteByte(&net_message, svs.maxclients);
2113                                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2114                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2115                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2116                                                 SZ_Clear(&net_message);
2117                                         }
2118                                         break;
2119                                 case CCREQ_PLAYER_INFO:
2120                                         if (developer.integer)
2121                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
2122                                         if (sv.active)
2123                                         {
2124                                                 int playerNumber, activeNumber, clientNumber;
2125                                                 client_t *client;
2126
2127                                                 playerNumber = MSG_ReadByte();
2128                                                 activeNumber = -1;
2129                                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
2130                                                         if (client->active && ++activeNumber == playerNumber)
2131                                                                 break;
2132                                                 if (clientNumber != svs.maxclients)
2133                                                 {
2134                                                         SZ_Clear(&net_message);
2135                                                         // save space for the header, filled in later
2136                                                         MSG_WriteLong(&net_message, 0);
2137                                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
2138                                                         MSG_WriteByte(&net_message, playerNumber);
2139                                                         MSG_WriteString(&net_message, client->name);
2140                                                         MSG_WriteLong(&net_message, client->colors);
2141                                                         MSG_WriteLong(&net_message, (int)client->edict->fields.server->frags);
2142                                                         MSG_WriteLong(&net_message, (int)(realtime - client->connecttime));
2143                                                         MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient");
2144                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2145                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2146                                                         SZ_Clear(&net_message);
2147                                                 }
2148                                         }
2149                                         break;
2150                                 case CCREQ_RULE_INFO:
2151                                         if (developer.integer)
2152                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
2153                                         if (sv.active)
2154                                         {
2155                                                 char *prevCvarName;
2156                                                 cvar_t *var;
2157
2158                                                 // find the search start location
2159                                                 prevCvarName = MSG_ReadString();
2160                                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
2161
2162                                                 // send the response
2163                                                 SZ_Clear(&net_message);
2164                                                 // save space for the header, filled in later
2165                                                 MSG_WriteLong(&net_message, 0);
2166                                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
2167                                                 if (var)
2168                                                 {
2169                                                         MSG_WriteString(&net_message, var->name);
2170                                                         MSG_WriteString(&net_message, var->string);
2171                                                 }
2172                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2173                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2174                                                 SZ_Clear(&net_message);
2175                                         }
2176                                         break;
2177 #endif
2178                                 default:
2179                                         break;
2180                                 }
2181                                 // we may not have liked the packet, but it was a valid control
2182                                 // packet, so we're done processing this packet now
2183                                 return true;
2184                         }
2185                 }
2186 #endif
2187                 if (host_client)
2188                 {
2189                         if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol)) == 2)
2190                         {
2191                                 SV_VM_Begin();
2192                                 SV_ReadClientMessage();
2193                                 SV_VM_End();
2194                                 return ret;
2195                         }
2196                 }
2197         }
2198         return 0;
2199 }
2200
2201 void NetConn_ServerFrame(void)
2202 {
2203         int i, length;
2204         lhnetaddress_t peeraddress;
2205         NetConn_UpdateSockets();
2206         for (i = 0;i < sv_numsockets;i++)
2207                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2208                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
2209         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2210         {
2211                 // never timeout loopback connections
2212                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2213                 {
2214                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
2215                         SV_DropClient(false);
2216                 }
2217         }
2218 }
2219
2220 void NetConn_QueryMasters(void)
2221 {
2222         int i;
2223         int masternum;
2224         lhnetaddress_t masteraddress;
2225         lhnetaddress_t broadcastaddress;
2226         char request[256];
2227
2228         if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
2229                 return;
2230
2231         // 26000 is the default quake server port, servers on other ports will not
2232         // be found
2233         // note this is IPv4-only, I doubt there are IPv6-only LANs out there
2234         LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
2235
2236         for (i = 0;i < cl_numsockets;i++)
2237         {
2238                 if (cl_sockets[i])
2239                 {
2240                         // search LAN for Quake servers
2241                         SZ_Clear(&net_message);
2242                         // save space for the header, filled in later
2243                         MSG_WriteLong(&net_message, 0);
2244                         MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
2245                         MSG_WriteString(&net_message, "QUAKE");
2246                         MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2247                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2248                         NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress);
2249                         SZ_Clear(&net_message);
2250
2251                         // search LAN for DarkPlaces servers
2252                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377getinfo", &broadcastaddress);
2253
2254                         // build the getservers message to send to the dpmaster master servers
2255                         dpsnprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
2256
2257                         // search internet
2258                         for (masternum = 0;sv_masters[masternum].name;masternum++)
2259                         {
2260                                 if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
2261                                 {
2262                                         masterquerycount++;
2263                                         NetConn_WriteString(cl_sockets[i], request, &masteraddress);
2264                                 }
2265                         }
2266
2267                         // build the getservers message to send to the qwmaster master servers
2268                         // note this has no -1 prefix, and the trailing nul byte is sent
2269                         dpsnprintf(request, sizeof(request), "c\n");
2270
2271                         // search internet
2272                         for (masternum = 0;sv_qwmasters[masternum].name;masternum++)
2273                         {
2274                                 if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
2275                                 {
2276                                         masterquerycount++;
2277                                         NetConn_Write(cl_sockets[i], request, 7, &masteraddress);
2278                                 }
2279                         }
2280                 }
2281         }
2282         if (!masterquerycount)
2283         {
2284                 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
2285                 M_Update_Return_Reason("No network");
2286         }
2287 }
2288
2289 void NetConn_Heartbeat(int priority)
2290 {
2291         lhnetaddress_t masteraddress;
2292         int masternum;
2293         lhnetsocket_t *mysocket;
2294
2295         // if it's a state change (client connected), limit next heartbeat to no
2296         // more than 30 sec in the future
2297         if (priority == 1 && nextheartbeattime > realtime + 30.0)
2298                 nextheartbeattime = realtime + 30.0;
2299
2300         // limit heartbeatperiod to 30 to 270 second range,
2301         // lower limit is to avoid abusing master servers with excess traffic,
2302         // upper limit is to avoid timing out on the master server (which uses
2303         // 300 sec timeout)
2304         if (sv_heartbeatperiod.value < 30)
2305                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
2306         if (sv_heartbeatperiod.value > 270)
2307                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
2308
2309         // make advertising optional and don't advertise singleplayer games, and
2310         // only send a heartbeat as often as the admin wants
2311         if (sv.active && sv_public.integer && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
2312         {
2313                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
2314                 for (masternum = 0;sv_masters[masternum].name;masternum++)
2315                         if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
2316                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
2317         }
2318 }
2319
2320 static void Net_Heartbeat_f(void)
2321 {
2322         if (sv.active)
2323                 NetConn_Heartbeat(2);
2324         else
2325                 Con_Print("No server running, can not heartbeat to master server.\n");
2326 }
2327
2328 void PrintStats(netconn_t *conn)
2329 {
2330         if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD))
2331                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->qw.outgoing_sequence, conn->qw.incoming_sequence);
2332         else
2333                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence);
2334 }
2335
2336 void Net_Stats_f(void)
2337 {
2338         netconn_t *conn;
2339         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
2340         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
2341         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
2342         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
2343         Con_Printf("packetsSent                = %i\n", packetsSent);
2344         Con_Printf("packetsReSent              = %i\n", packetsReSent);
2345         Con_Printf("packetsReceived            = %i\n", packetsReceived);
2346         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
2347         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
2348         Con_Print("connections                =\n");
2349         for (conn = netconn_list;conn;conn = conn->next)
2350                 PrintStats(conn);
2351 }
2352
2353 void Net_Slist_f(void)
2354 {
2355         ServerList_ResetMasks();
2356         serverlist_sortbyfield = SLIF_PING;
2357         serverlist_sortdescending = false;
2358     if (m_state != m_slist) {
2359                 Con_Print("Sending requests to master servers\n");
2360                 ServerList_QueryList();
2361                 serverlist_consoleoutput = true;
2362                 Con_Print("Listening for replies...\n");
2363         } else
2364                 ServerList_QueryList();
2365 }
2366
2367 void NetConn_Init(void)
2368 {
2369         int i;
2370         lhnetaddress_t tempaddress;
2371         netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
2372         Cmd_AddCommand("net_stats", Net_Stats_f, "print network statistics");
2373         Cmd_AddCommand("net_slist", Net_Slist_f, "query master series and print all server information");
2374         Cmd_AddCommand("heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)");
2375         Cvar_RegisterVariable(&net_slist_queriespersecond);
2376         Cvar_RegisterVariable(&net_slist_queriesperframe);
2377         Cvar_RegisterVariable(&net_slist_timeout);
2378         Cvar_RegisterVariable(&net_slist_maxtries);
2379         Cvar_RegisterVariable(&net_messagetimeout);
2380         Cvar_RegisterVariable(&net_messagerejointimeout);
2381         Cvar_RegisterVariable(&net_connecttimeout);
2382         Cvar_RegisterVariable(&cl_netlocalping);
2383         Cvar_RegisterVariable(&cl_netpacketloss);
2384         Cvar_RegisterVariable(&hostname);
2385         Cvar_RegisterVariable(&developer_networking);
2386         Cvar_RegisterVariable(&cl_netport);
2387         Cvar_RegisterVariable(&sv_netport);
2388         Cvar_RegisterVariable(&net_address);
2389         //Cvar_RegisterVariable(&net_address_ipv6);
2390         Cvar_RegisterVariable(&sv_public);
2391         Cvar_RegisterVariable(&sv_heartbeatperiod);
2392         for (i = 0;sv_masters[i].name;i++)
2393                 Cvar_RegisterVariable(&sv_masters[i]);
2394 // 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.
2395         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
2396         {
2397                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
2398                 {
2399                         Con_Printf("-ip option used, setting net_address to \"%s\"\n");
2400                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
2401                 }
2402                 else
2403                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
2404         }
2405 // 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
2406         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
2407         {
2408                 i = atoi(com_argv[i + 1]);
2409                 if (i >= 0 && i < 65536)
2410                 {
2411                         Con_Printf("-port option used, setting port cvar to %i\n", i);
2412                         Cvar_SetValueQuick(&sv_netport, i);
2413                 }
2414                 else
2415                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
2416         }
2417         cl_numsockets = 0;
2418         sv_numsockets = 0;
2419         net_message.data = net_message_buf;
2420         net_message.maxsize = sizeof(net_message_buf);
2421         net_message.cursize = 0;
2422         LHNET_Init();
2423 }
2424
2425 void NetConn_Shutdown(void)
2426 {
2427         NetConn_CloseClientPorts();
2428         NetConn_CloseServerPorts();
2429         LHNET_Shutdown();
2430 }
2431