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", "192.246.40.37:27000", "id Limbo (admin: id Software)"},
  53         {0, "sv_qwmasterextra2", "192.246.40.37:27002", "id CTF (admin: id Software)"},
  54         {0, "sv_qwmasterextra3", "192.246.40.37:27003", "id TeamFortress (admin: id Software)"},
  55         {0, "sv_qwmasterextra4", "192.246.40.37:27004", "id Miscilaneous (admin: id Software)"},
  56         {0, "sv_qwmasterextra5", "192.246.40.37:27006", "id Deathmatch Only (admin: id Software)"},
  57         {0, "sv_qwmasterextra6", "150.254.66.120:27000", "Poland's master server. (admin: unknown)"},
  58         {0, "sv_qwmasterextra7", "62.112.145.129:27000", "Ocrana master server. (admin: unknown)"},
  59         {0, "sv_qwmasterextra8", "master.edome.net", "edome master server. (admin: unknown)"},
  60         {0, "sv_qwmasterextra9", "qwmaster.barrysworld.com", "barrysworld master server. (admin: unknown)"},
  61         {0, "sv_qwmasterextra10", "qwmaster.ocrana.de:27000", "Ocrana2 master server. (admin: unknown)"},
  62         {0, "sv_qwmasterextra11", "213.221.174.165:27000", "unknown1 master server. (admin: unknown)"},
  63         {0, "sv_qwmasterextra12", "195.74.0.8", "unknown2 master server. (admin: unknown)"},
  64         {0, "sv_qwmasterextra13", "204.182.161.2", "unknown3 master server. (admin: unknown)"},
  65         {0, NULL, NULL, NULL}
  66 };
  67
  68 static double nextheartbeattime = 0;
  69
  70 sizebuf_t net_message;
  71 static unsigned char net_message_buf[NET_MAXMESSAGE];
  72
  73 cvar_t net_messagetimeout = {0, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"};
  74 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)"};
  75 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)"};
  76 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"};
  77 cvar_t developer_networking = {0, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"};
  78
  79 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)"};
  80 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)"};
  81 static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20", "how many server information requests to send per second"};
  82 static cvar_t net_slist_queriesperframe = {0, "net_slist_queriesperframe", "4", "maximum number of server information requests to send each rendered frame (guards against low framerates causing problems)"};
  83 static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"};
  84 static cvar_t net_slist_maxtries = {0, "net_slist_maxtries", "3", "how many times to ask the same server for information (more times gives better ping reports but takes longer)"};
  85
  86 static cvar_t gameversion = {0, "gameversion", "0", "version of game data (mod-specific), when client and server gameversion mismatch in the server browser the server is shown as incompatible"};
  87
  88 /* statistic counters */
  89 static int packetsSent = 0;
  90 static int packetsReSent = 0;
  91 static int packetsReceived = 0;
  92 static int receivedDuplicateCount = 0;
  93 static int droppedDatagrams = 0;
  94
  95 static int unreliableMessagesSent = 0;
  96 static int unreliableMessagesReceived = 0;
  97 static int reliableMessagesSent = 0;
  98 static int reliableMessagesReceived = 0;
  99
 100 double masterquerytime = -1000;
 101 int masterquerycount = 0;
 102 int masterreplycount = 0;
 103 int serverquerycount = 0;
 104 int serverreplycount = 0;
 105
 106 // this is only false if there are still servers left to query
 107 static qboolean serverlist_querysleep = true;
 108 // this is pushed a second or two ahead of realtime whenever a master server
 109 // reply is received, to avoid issuing queries while master replies are still
 110 // flooding in (which would make a mess of the ping times)
 111 static double serverlist_querywaittime = 0;
 112
 113 static unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 114 static unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 115
 116 static int cl_numsockets;
 117 static lhnetsocket_t *cl_sockets[16];
 118 static int sv_numsockets;
 119 static lhnetsocket_t *sv_sockets[16];
 120
 121 netconn_t *netconn_list = NULL;
 122 mempool_t *netconn_mempool = NULL;
 123
 124 cvar_t cl_netport = {0, "cl_port", "0", "forces client to use chosen port number if not 0"};
 125 cvar_t sv_netport = {0, "port", "26000", "server port for players to connect to"};
 126 cvar_t net_address = {0, "net_address", "0.0.0.0", "network address to open ports on"};
 127 //cvar_t net_netaddress_ipv6 = {0, "net_address_ipv6", "[0:0:0:0:0:0:0:0]", "network address to open ipv6 ports on"};
 128
 129 // ServerList interface
 130 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
 131 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
 132
 133 serverlist_infofield_t serverlist_sortbyfield;
 134 qboolean serverlist_sortdescending;
 135
 136 int serverlist_viewcount = 0;
 137 serverlist_entry_t *serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
 138
 139 int serverlist_cachecount;
 140 serverlist_entry_t serverlist_cache[SERVERLIST_TOTALSIZE];
 141
 142 qboolean serverlist_consoleoutput;
 143
 144 // helper function to insert a value into the viewset
 145 // spare entries will be removed
 146 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
 147 {
 148     int i;
 149         if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) {
 150                 i = serverlist_viewcount++;
 151         } else {
 152                 i = SERVERLIST_VIEWLISTSIZE - 1;
 153         }
 154
 155         for( ; i > index ; i-- )
 156                 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
 157
 158         serverlist_viewlist[index] = entry;
 159 }
 160
 161 // we suppose serverlist_viewcount to be valid, ie > 0
 162 static void _ServerList_ViewList_Helper_Remove( int index )
 163 {
 164         serverlist_viewcount--;
 165         for( ; index < serverlist_viewcount ; index++ )
 166                 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
 167 }
 168
 169 // returns true if A should be inserted before B
 170 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
 171 {
 172         int result = 0; // > 0 if for numbers A > B and for text if A < B
 173
 174         switch( serverlist_sortbyfield ) {
 175                 case SLIF_PING:
 176                         result = A->info.ping - B->info.ping;
 177                         break;
 178                 case SLIF_MAXPLAYERS:
 179                         result = A->info.maxplayers - B->info.maxplayers;
 180                         break;
 181                 case SLIF_NUMPLAYERS:
 182                         result = A->info.numplayers - B->info.numplayers;
 183                         break;
 184                 case SLIF_PROTOCOL:
 185                         result = A->info.protocol - B->info.protocol;
 186                         break;
 187                 case SLIF_CNAME:
 188                         result = strcmp( B->info.cname, A->info.cname );
 189                         break;
 190                 case SLIF_GAME:
 191                         result = strcmp( B->info.game, A->info.game );
 192                         break;
 193                 case SLIF_MAP:
 194                         result = strcmp( B->info.map, A->info.map );
 195                         break;
 196                 case SLIF_MOD:
 197                         result = strcmp( B->info.mod, A->info.mod );
 198                         break;
 199                 case SLIF_NAME:
 200                         result = strcmp( B->info.name, A->info.name );
 201                         break;
 202                 default:
 203                         Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
 204                         break;
 205         }
 206
 207         if( serverlist_sortdescending )
 208                 return result > 0;
 209         if (result != 0)
 210                 return result < 0;
 211         // if the chosen sort key is identical, sort by index
 212         // (makes this a stable sort, so that later replies from servers won't
 213         //  shuffle the servers around when they have the same ping)
 214         return A < B;
 215 }
 216
 217 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
 218 {
 219         // This should actually be done with some intermediate and end-of-function return
 220         switch( op ) {
 221                 case SLMO_LESS:
 222                         return A < B;
 223                 case SLMO_LESSEQUAL:
 224                         return A <= B;
 225                 case SLMO_EQUAL:
 226                         return A == B;
 227                 case SLMO_GREATER:
 228                         return A > B;
 229                 case SLMO_NOTEQUAL:
 230                         return A != B;
 231                 case SLMO_GREATEREQUAL:
 232                 case SLMO_CONTAINS:
 233                 case SLMO_NOTCONTAIN:
 234                         return A >= B;
 235                 default:
 236                         Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
 237                         return false;
 238         }
 239 }
 240
 241 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
 242 {
 243         int i;
 244         char bufferA[ 256 ], bufferB[ 256 ]; // should be more than enough
 245         for (i = 0;i < (int)sizeof(bufferA)-1 && A[i];i++)
 246                 bufferA[i] = (A[i] >= 'A' && A[i] <= 'Z') ? (A[i] + 'a' - 'A') : A[i];
 247         bufferA[i] = 0;
 248         for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++)
 249                 bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i];
 250         bufferB[i] = 0;
 251
 252         // Same here, also using an intermediate & final return would be more appropriate
 253         // A info B mask
 254         switch( op ) {
 255                 case SLMO_CONTAINS:
 256                         return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool
 257                 case SLMO_NOTCONTAIN:
 258                         return !*bufferB || !strstr( bufferA, bufferB );
 259                 case SLMO_LESS:
 260                         return strcmp( bufferA, bufferB ) < 0;
 261                 case SLMO_LESSEQUAL:
 262                         return strcmp( bufferA, bufferB ) <= 0;
 263                 case SLMO_EQUAL:
 264                         return strcmp( bufferA, bufferB ) == 0;
 265                 case SLMO_GREATER:
 266                         return strcmp( bufferA, bufferB ) > 0;
 267                 case SLMO_NOTEQUAL:
 268                         return strcmp( bufferA, bufferB ) != 0;
 269                 case SLMO_GREATEREQUAL:
 270                         return strcmp( bufferA, bufferB ) >= 0;
 271                 default:
 272                         Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
 273                         return false;
 274         }
 275 }
 276
 277 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
 278 {
 279         if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
 280                 return false;
 281         if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
 282                 return false;
 283         if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
 284                 return false;
 285         if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
 286                 return false;
 287         if( *mask->info.cname
 288                 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
 289                 return false;
 290         if( *mask->info.game
 291                 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
 292                 return false;
 293         if( *mask->info.mod
 294                 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
 295                 return false;
 296         if( *mask->info.map
 297                 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
 298                 return false;
 299         if( *mask->info.name
 300                 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
 301                 return false;
 302         return true;
 303 }
 304
 305 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
 306 {
 307         int start, end, mid;
 308
 309         // reject incompatible servers
 310         if (entry->info.gameversion != gameversion.integer)
 311                 return;
 312
 313         // FIXME: change this to be more readable (...)
 314         // now check whether it passes through the masks
 315         for( start = 0 ; serverlist_andmasks[start].active && start < SERVERLIST_ANDMASKCOUNT ; start++ )
 316                 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
 317                         return;
 318
 319         for( start = 0 ; serverlist_ormasks[start].active && start < SERVERLIST_ORMASKCOUNT ; start++ )
 320                 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
 321                         break;
 322         if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
 323                 return;
 324
 325         if( !serverlist_viewcount ) {
 326                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 327                 return;
 328         }
 329         // ok, insert it, we just need to find out where exactly:
 330
 331         // two special cases
 332         // check whether to insert it as new first item
 333         if( _ServerList_Entry_Compare( entry, serverlist_viewlist[0] ) ) {
 334                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 335                 return;
 336         } // check whether to insert it as new last item
 337         else if( !_ServerList_Entry_Compare( entry, serverlist_viewlist[serverlist_viewcount - 1] ) ) {
 338                 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
 339                 return;
 340         }
 341         start = 0;
 342         end = serverlist_viewcount - 1;
 343         while( end > start + 1 )
 344         {
 345                 mid = (start + end) / 2;
 346                 // test the item that lies in the middle between start and end
 347                 if( _ServerList_Entry_Compare( entry, serverlist_viewlist[mid] ) )
 348                         // the item has to be in the upper half
 349                         end = mid;
 350                 else
 351                         // the item has to be in the lower half
 352                         start = mid;
 353         }
 354         _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
 355 }
 356
 357 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
 358 {
 359         int i;
 360         for( i = 0; i < serverlist_viewcount; i++ )
 361         {
 362                 if (serverlist_viewlist[i] == entry)
 363                 {
 364                         _ServerList_ViewList_Helper_Remove(i);
 365                         break;
 366                 }
 367         }
 368 }
 369
 370 void ServerList_RebuildViewList(void)
 371 {
 372         int i;
 373
 374         serverlist_viewcount = 0;
 375         for( i = 0 ; i < serverlist_cachecount ; i++ )
 376                 if( serverlist_cache[i].query == SQS_QUERIED )
 377                         ServerList_ViewList_Insert( &serverlist_cache[i] );
 378 }
 379
 380 void ServerList_ResetMasks(void)
 381 {
 382         memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
 383         memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
 384 }
 385
 386 #if 0
 387 static void _ServerList_Test(void)
 388 {
 389         int i;
 390         for( i = 0 ; i < 1024 ; i++ ) {
 391                 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) );
 392                 serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i;
 393                 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i );
 394                 serverlist_cache[serverlist_cachecount].finished = true;
 395                 sprintf( serverlist_cache[serverlist_cachecount].line1, "%i %s", serverlist_cache[serverlist_cachecount].info.ping, serverlist_cache[serverlist_cachecount].info.name );
 396                 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
 397                 serverlist_cachecount++;
 398         }
 399 }
 400 #endif
 401
 402 void ServerList_QueryList(qboolean querydp, qboolean queryqw)
 403 {
 404         //masterquerytime = realtime;
 405         masterquerytime = Sys_DoubleTime();
 406         masterquerycount = 0;
 407         masterreplycount = 0;
 408         serverquerycount = 0;
 409         serverreplycount = 0;
 410         serverlist_cachecount = 0;
 411         serverlist_viewcount = 0;
 412         serverlist_consoleoutput = false;
 413
 414         //_ServerList_Test();
 415
 416         NetConn_QueryMasters(querydp, queryqw);
 417 }
 418
 419 // rest
 420
 421 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
 422 {
 423         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 424         int i;
 425         if (length == 0)
 426                 return 0;
 427         if (cl_netpacketloss.integer)
 428                 for (i = 0;i < cl_numsockets;i++)
 429                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer)
 430                                 return 0;
 431         if (developer_networking.integer)
 432         {
 433                 char addressstring[128], addressstring2[128];
 434                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 435                 if (length > 0)
 436                 {
 437                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 438                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
 439                         Com_HexDumpToConsole((unsigned char *)data, length);
 440                 }
 441                 else
 442                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
 443         }
 444         return length;
 445 }
 446
 447 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 448 {
 449         int ret;
 450         int i;
 451         if (cl_netpacketloss.integer)
 452                 for (i = 0;i < cl_numsockets;i++)
 453                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer)
 454                                 return length;
 455         ret = LHNET_Write(mysocket, data, length, peeraddress);
 456         if (developer_networking.integer)
 457         {
 458                 char addressstring[128], addressstring2[128];
 459                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 460                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 461                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 462                 Com_HexDumpToConsole((unsigned char *)data, length);
 463         }
 464         return ret;
 465 }
 466
 467 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 468 {
 469         // note this does not include the trailing NULL because we add that in the parser
 470         return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress);
 471 }
 472
 473 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol)
 474 {
 475         if (protocol == PROTOCOL_QUAKEWORLD)
 476         {
 477                 int packetLen;
 478                 qboolean sendreliable;
 479
 480                 // note that it is ok to send empty messages to the qw server,
 481                 // otherwise it won't respond to us at all
 482
 483                 sendreliable = false;
 484                 // if the remote side dropped the last reliable message, resend it
 485                 if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence)
 486                         sendreliable = true;
 487                 // if the reliable transmit buffer is empty, copy the current message out
 488                 if (!conn->sendMessageLength && conn->message.cursize)
 489                 {
 490                         memcpy (conn->sendMessage, conn->message.data, conn->message.cursize);
 491                         conn->sendMessageLength = conn->message.cursize;
 492                         SZ_Clear(&conn->message); // clear the message buffer
 493                         conn->qw.reliable_sequence ^= 1;
 494                         sendreliable = true;
 495                 }
 496                 // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1)
 497                 *((int *)(sendbuffer + 0)) = LittleLong((unsigned int)conn->qw.outgoing_sequence | ((unsigned int)sendreliable<<31));
 498                 // last received unreliable packet number, and last received reliable packet number (0 or 1)
 499                 *((int *)(sendbuffer + 4)) = LittleLong((unsigned int)conn->qw.incoming_sequence | ((unsigned int)conn->qw.incoming_reliable_sequence<<31));
 500                 packetLen = 8;
 501                 conn->qw.outgoing_sequence++;
 502                 // client sends qport in every packet
 503                 if (conn == cls.netcon)
 504                 {
 505                         *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport);
 506                         packetLen += 2;
 507                 }
 508                 if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400)
 509                 {
 510                         Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize);
 511                         return -1;
 512                 }
 513                 // add the reliable message if there is one
 514                 if (sendreliable)
 515                 {
 516                         memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength);
 517                         packetLen += conn->sendMessageLength;
 518                         conn->qw.last_reliable_sequence = conn->qw.outgoing_sequence;
 519                 }
 520                 // add the unreliable message if possible
 521                 if (packetLen + data->cursize <= 1400)
 522                 {
 523                         memcpy(sendbuffer + packetLen, data->data, data->cursize);
 524                         packetLen += data->cursize;
 525                 }
 526
 527                 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 528
 529                 packetsSent++;
 530                 unreliableMessagesSent++;
 531
 532                 // delay later packets to obey rate limit
 533                 conn->qw.cleartime = max(conn->qw.cleartime, realtime) + packetLen * conn->qw.rate;
 534
 535                 return 0;
 536         }
 537         else
 538         {
 539                 unsigned int packetLen;
 540                 unsigned int dataLen;
 541                 unsigned int eom;
 542                 unsigned int *header;
 543
 544                 // if a reliable message fragment has been lost, send it again
 545                 if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0)
 546                 {
 547                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 548                         {
 549                                 dataLen = conn->sendMessageLength;
 550                                 eom = NETFLAG_EOM;
 551                         }
 552                         else
 553                         {
 554                                 dataLen = MAX_PACKETFRAGMENT;
 555                                 eom = 0;
 556                         }
 557
 558                         packetLen = NET_HEADERSIZE + dataLen;
 559
 560                         header = (unsigned int *)sendbuffer;
 561                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 562                         header[1] = BigLong(conn->nq.sendSequence - 1);
 563                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 564
 565                         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
 566                         {
 567                                 conn->lastSendTime = realtime;
 568                                 packetsReSent++;
 569                         }
 570                 }
 571
 572                 // if we have a new reliable message to send, do so
 573                 if (!conn->sendMessageLength && conn->message.cursize)
 574                 {
 575                         if (conn->message.cursize > (int)sizeof(conn->sendMessage))
 576                         {
 577                                 Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, sizeof(conn->sendMessage));
 578                                 conn->message.overflowed = true;
 579                                 return -1;
 580                         }
 581
 582                         if (developer_networking.integer && conn == cls.netcon)
 583                         {
 584                                 Con_Print("client sending reliable message to server:\n");
 585                                 SZ_HexDumpToConsole(&conn->message);
 586                         }
 587
 588                         memcpy(conn->sendMessage, conn->message.data, conn->message.cursize);
 589                         conn->sendMessageLength = conn->message.cursize;
 590                         SZ_Clear(&conn->message);
 591
 592                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 593                         {
 594                                 dataLen = conn->sendMessageLength;
 595                                 eom = NETFLAG_EOM;
 596                         }
 597                         else
 598                         {
 599                                 dataLen = MAX_PACKETFRAGMENT;
 600                                 eom = 0;
 601                         }
 602
 603                         packetLen = NET_HEADERSIZE + dataLen;
 604
 605                         header = (unsigned int *)sendbuffer;
 606                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 607                         header[1] = BigLong(conn->nq.sendSequence);
 608                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 609
 610                         conn->nq.sendSequence++;
 611
 612                         NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 613
 614                         conn->lastSendTime = realtime;
 615                         packetsSent++;
 616                         reliableMessagesSent++;
 617                 }
 618
 619                 // if we have an unreliable message to send, do so
 620                 if (data->cursize)
 621                 {
 622                         packetLen = NET_HEADERSIZE + data->cursize;
 623
 624                         if (packetLen > (int)sizeof(sendbuffer))
 625                         {
 626                                 Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize);
 627                                 return -1;
 628                         }
 629
 630                         header = (unsigned int *)sendbuffer;
 631                         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
 632                         header[1] = BigLong(conn->nq.unreliableSendSequence);
 633                         memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
 634
 635                         conn->nq.unreliableSendSequence++;
 636
 637                         NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 638
 639                         packetsSent++;
 640                         unreliableMessagesSent++;
 641                 }
 642                 return 0;
 643         }
 644 }
 645
 646 void NetConn_CloseClientPorts(void)
 647 {
 648         for (;cl_numsockets > 0;cl_numsockets--)
 649                 if (cl_sockets[cl_numsockets - 1])
 650                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 651 }
 652
 653 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
 654 {
 655         lhnetaddress_t address;
 656         lhnetsocket_t *s;
 657         char addressstring2[1024];
 658         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 659         {
 660                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 661                 {
 662                         cl_sockets[cl_numsockets++] = s;
 663                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 664                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
 665                 }
 666                 else
 667                 {
 668                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 669                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 670                 }
 671         }
 672         else
 673                 Con_Printf("Client unable to parse address %s\n", addressstring);
 674 }
 675
 676 void NetConn_OpenClientPorts(void)
 677 {
 678         int port;
 679         NetConn_CloseClientPorts();
 680         port = bound(0, cl_netport.integer, 65535);
 681         if (cl_netport.integer != port)
 682                 Cvar_SetValueQuick(&cl_netport, port);
 683         Con_Printf("Client using port %i\n", port);
 684         NetConn_OpenClientPort("local:2", 0);
 685         NetConn_OpenClientPort(net_address.string, port);
 686         //NetConn_OpenClientPort(net_address_ipv6.string, port);
 687 }
 688
 689 void NetConn_CloseServerPorts(void)
 690 {
 691         for (;sv_numsockets > 0;sv_numsockets--)
 692                 if (sv_sockets[sv_numsockets - 1])
 693                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 694 }
 695
 696 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
 697 {
 698         lhnetaddress_t address;
 699         lhnetsocket_t *s;
 700         int port;
 701         char addressstring2[1024];
 702
 703         for (port = defaultport; port <= defaultport + 100; port++)
 704         {
 705                 if (LHNETADDRESS_FromString(&address, addressstring, port))
 706                 {
 707                         if ((s = LHNET_OpenSocket_Connectionless(&address)))
 708                         {
 709                                 sv_sockets[sv_numsockets++] = s;
 710                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 711                                 Con_Printf("Server listening on address %s\n", addressstring2);
 712                                 break;
 713                         }
 714                         else
 715                         {
 716                                 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 717                                 Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 718                         }
 719                 }
 720                 else
 721                 {
 722                         Con_Printf("Server unable to parse address %s\n", addressstring);
 723                         // if it cant parse one address, it wont be able to parse another for sure
 724                         break;
 725                 }
 726         }
 727 }
 728
 729 void NetConn_OpenServerPorts(int opennetports)
 730 {
 731         int port;
 732         NetConn_CloseServerPorts();
 733         NetConn_UpdateSockets();
 734         port = bound(0, sv_netport.integer, 65535);
 735         if (port == 0)
 736                 port = 26000;
 737         Con_Printf("Server using port %i\n", port);
 738         if (sv_netport.integer != port)
 739                 Cvar_SetValueQuick(&sv_netport, port);
 740         if (cls.state != ca_dedicated)
 741                 NetConn_OpenServerPort("local:1", 0);
 742         if (opennetports)
 743         {
 744                 NetConn_OpenServerPort(net_address.string, port);
 745                 //NetConn_OpenServerPort(net_address_ipv6.string, port);
 746         }
 747         if (sv_numsockets == 0)
 748                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!");
 749 }
 750
 751 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
 752 {
 753         int i, a = LHNETADDRESS_GetAddressType(address);
 754         for (i = 0;i < cl_numsockets;i++)
 755                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
 756                         return cl_sockets[i];
 757         return NULL;
 758 }
 759
 760 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
 761 {
 762         int i, a = LHNETADDRESS_GetAddressType(address);
 763         for (i = 0;i < sv_numsockets;i++)
 764                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
 765                         return sv_sockets[i];
 766         return NULL;
 767 }
 768
 769 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 770 {
 771         netconn_t *conn;
 772         conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn));
 773         conn->mysocket = mysocket;
 774         conn->peeraddress = *peeraddress;
 775         conn->lastMessageTime = realtime;
 776         conn->message.data = conn->messagedata;
 777         conn->message.maxsize = sizeof(conn->messagedata);
 778         conn->message.cursize = 0;
 779         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
 780         // reduce effectiveness of connection request floods
 781         conn->timeout = realtime + net_connecttimeout.value;
 782         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
 783         conn->next = netconn_list;
 784         netconn_list = conn;
 785         return conn;
 786 }
 787
 788 void NetConn_Close(netconn_t *conn)
 789 {
 790         netconn_t *c;
 791         // remove connection from list
 792         if (conn == netconn_list)
 793                 netconn_list = conn->next;
 794         else
 795         {
 796                 for (c = netconn_list;c;c = c->next)
 797                 {
 798                         if (c->next == conn)
 799                         {
 800                                 c->next = conn->next;
 801                                 break;
 802                         }
 803                 }
 804                 // not found in list, we'll avoid crashing here...
 805                 if (!c)
 806                         return;
 807         }
 808         // free connection
 809         Mem_Free(conn);
 810 }
 811
 812 static int clientport = -1;
 813 static int clientport2 = -1;
 814 static int hostport = -1;
 815 void NetConn_UpdateSockets(void)
 816 {
 817         if (cls.state != ca_dedicated)
 818         {
 819                 if (clientport2 != cl_netport.integer)
 820                 {
 821                         clientport2 = cl_netport.integer;
 822                         if (cls.state == ca_connected)
 823                                 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
 824                 }
 825                 if (cls.state == ca_disconnected && clientport != clientport2)
 826                 {
 827                         clientport = clientport2;
 828                         NetConn_CloseClientPorts();
 829                 }
 830                 if (cl_numsockets == 0)
 831                         NetConn_OpenClientPorts();
 832         }
 833
 834         if (hostport != sv_netport.integer)
 835         {
 836                 hostport = sv_netport.integer;
 837                 if (sv.active)
 838                         Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
 839         }
 840 }
 841
 842 static int NetConn_ReceivedMessage(netconn_t *conn, unsigned char *data, int length, protocolversion_t protocol)
 843 {
 844         if (length < 8)
 845                 return 0;
 846
 847         if (protocol == PROTOCOL_QUAKEWORLD)
 848         {
 849                 int sequence, sequence_ack;
 850                 int reliable_ack, reliable_message;
 851                 int count;
 852                 int qport;
 853
 854                 sequence = LittleLong(*((int *)(data + 0)));
 855                 sequence_ack = LittleLong(*((int *)(data + 4)));
 856                 data += 8;
 857                 length -= 8;
 858
 859                 if (conn != cls.netcon)
 860                 {
 861                         // server only
 862                         if (length < 2)
 863                                 return 0;
 864                         // 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?)
 865                         qport = LittleShort(*((int *)(data + 8)));
 866                         data += 2;
 867                         length -= 2;
 868                 }
 869
 870                 packetsReceived++;
 871                 reliable_message = (sequence >> 31) & 1;
 872                 reliable_ack = (sequence_ack >> 31) & 1;
 873                 sequence &= ~(1<<31);
 874                 sequence_ack &= ~(1<<31);
 875                 if (sequence <= conn->qw.incoming_sequence)
 876                 {
 877                         Con_DPrint("Got a stale datagram\n");
 878                         return 0;
 879                 }
 880                 count = sequence - (conn->qw.incoming_sequence + 1);
 881                 if (count > 0)
 882                 {
 883                         droppedDatagrams += count;
 884                         Con_DPrintf("Dropped %u datagram(s)\n", count);
 885                 }
 886                 if (reliable_ack == conn->qw.reliable_sequence)
 887                 {
 888                         // received, now we will be able to send another reliable message
 889                         conn->sendMessageLength = 0;
 890                         reliableMessagesReceived++;
 891                 }
 892                 conn->qw.incoming_sequence = sequence;
 893                 conn->qw.incoming_acknowledged = sequence_ack;
 894                 conn->qw.incoming_reliable_acknowledged = reliable_ack;
 895                 if (reliable_message)
 896                         conn->qw.incoming_reliable_sequence ^= 1;
 897                 conn->lastMessageTime = realtime;
 898                 conn->timeout = realtime + net_messagetimeout.value;
 899                 unreliableMessagesReceived++;
 900                 SZ_Clear(&net_message);
 901                 SZ_Write(&net_message, data, length);
 902                 MSG_BeginReading();
 903                 return 2;
 904         }
 905         else
 906         {
 907                 unsigned int count;
 908                 unsigned int flags;
 909                 unsigned int sequence;
 910                 int qlength;
 911
 912                 qlength = (unsigned int)BigLong(((int *)data)[0]);
 913                 flags = qlength & ~NETFLAG_LENGTH_MASK;
 914                 qlength &= NETFLAG_LENGTH_MASK;
 915                 // control packets were already handled
 916                 if (!(flags & NETFLAG_CTL) && qlength == length)
 917                 {
 918                         sequence = BigLong(((int *)data)[1]);
 919                         packetsReceived++;
 920                         data += 8;
 921                         length -= 8;
 922                         if (flags & NETFLAG_UNRELIABLE)
 923                         {
 924                                 if (sequence >= conn->nq.unreliableReceiveSequence)
 925                                 {
 926                                         if (sequence > conn->nq.unreliableReceiveSequence)
 927                                         {
 928                                                 count = sequence - conn->nq.unreliableReceiveSequence;
 929                                                 droppedDatagrams += count;
 930                                                 Con_DPrintf("Dropped %u datagram(s)\n", count);
 931                                         }
 932                                         conn->nq.unreliableReceiveSequence = sequence + 1;
 933                                         conn->lastMessageTime = realtime;
 934                                         conn->timeout = realtime + net_messagetimeout.value;
 935                                         unreliableMessagesReceived++;
 936                                         if (length > 0)
 937                                         {
 938                                                 SZ_Clear(&net_message);
 939                                                 SZ_Write(&net_message, data, length);
 940                                                 MSG_BeginReading();
 941                                                 return 2;
 942                                         }
 943                                 }
 944                                 else
 945                                         Con_DPrint("Got a stale datagram\n");
 946                                 return 1;
 947                         }
 948                         else if (flags & NETFLAG_ACK)
 949                         {
 950                                 if (sequence == (conn->nq.sendSequence - 1))
 951                                 {
 952                                         if (sequence == conn->nq.ackSequence)
 953                                         {
 954                                                 conn->nq.ackSequence++;
 955                                                 if (conn->nq.ackSequence != conn->nq.sendSequence)
 956                                                         Con_DPrint("ack sequencing error\n");
 957                                                 conn->lastMessageTime = realtime;
 958                                                 conn->timeout = realtime + net_messagetimeout.value;
 959                                                 if (conn->sendMessageLength > MAX_PACKETFRAGMENT)
 960                                                 {
 961                                                         unsigned int packetLen;
 962                                                         unsigned int dataLen;
 963                                                         unsigned int eom;
 964                                                         unsigned int *header;
 965
 966                                                         conn->sendMessageLength -= MAX_PACKETFRAGMENT;
 967                                                         memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
 968
 969                                                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 970                                                         {
 971                                                                 dataLen = conn->sendMessageLength;
 972                                                                 eom = NETFLAG_EOM;
 973                                                         }
 974                                                         else
 975                                                         {
 976                                                                 dataLen = MAX_PACKETFRAGMENT;
 977                                                                 eom = 0;
 978                                                         }
 979
 980                                                         packetLen = NET_HEADERSIZE + dataLen;
 981
 982                                                         header = (unsigned int *)sendbuffer;
 983                                                         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 984                                                         header[1] = BigLong(conn->nq.sendSequence);
 985                                                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 986
 987                                                         conn->nq.sendSequence++;
 988
 989                                                         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) == (int)packetLen)
 990                                                         {
 991                                                                 conn->lastSendTime = realtime;
 992                                                                 packetsSent++;
 993                                                         }
 994                                                 }
 995                                                 else
 996                                                         conn->sendMessageLength = 0;
 997                                         }
 998                                         else
 999                                                 Con_DPrint("Duplicate ACK received\n");
1000                                 }
1001                                 else
1002                                         Con_DPrint("Stale ACK received\n");
1003                                 return 1;
1004                         }
1005                         else if (flags & NETFLAG_DATA)
1006                         {
1007                                 unsigned int temppacket[2];
1008                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
1009                                 temppacket[1] = BigLong(sequence);
1010                                 NetConn_Write(conn->mysocket, (unsigned char *)temppacket, 8, &conn->peeraddress);
1011                                 if (sequence == conn->nq.receiveSequence)
1012                                 {
1013                                         conn->lastMessageTime = realtime;
1014                                         conn->timeout = realtime + net_messagetimeout.value;
1015                                         conn->nq.receiveSequence++;
1016                                         if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) {
1017                                                 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
1018                                                 conn->receiveMessageLength += length;
1019                                         } else {
1020                                                 Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n"
1021                                                                         "Dropping the message!\n", sequence );
1022                                                 conn->receiveMessageLength = 0;
1023                                                 return 1;
1024                                         }
1025                                         if (flags & NETFLAG_EOM)
1026                                         {
1027                                                 reliableMessagesReceived++;
1028                                                 length = conn->receiveMessageLength;
1029                                                 conn->receiveMessageLength = 0;
1030                                                 if (length > 0)
1031                                                 {
1032                                                         SZ_Clear(&net_message);
1033                                                         SZ_Write(&net_message, conn->receiveMessage, length);
1034                                                         MSG_BeginReading();
1035                                                         return 2;
1036                                                 }
1037                                         }
1038                                 }
1039                                 else
1040                                         receivedDuplicateCount++;
1041                                 return 1;
1042                         }
1043                 }
1044         }
1045         return 0;
1046 }
1047
1048 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol)
1049 {
1050         cls.connect_trying = false;
1051         M_Update_Return_Reason("");
1052         // the connection request succeeded, stop current connection and set up a new connection
1053         CL_Disconnect();
1054         // if we're connecting to a remote server, shut down any local server
1055         if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active)
1056                 Host_ShutdownServer ();
1057         // allocate a net connection to keep track of things
1058         cls.netcon = NetConn_Open(mysocket, peeraddress);
1059         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
1060         key_dest = key_game;
1061         m_state = m_none;
1062         cls.demonum = -1;                       // not in the demo loop now
1063         cls.state = ca_connected;
1064         cls.signon = 0;                         // need all the signon messages before playing
1065         cls.protocol = initialprotocol;
1066         if (cls.protocol == PROTOCOL_QUAKEWORLD)
1067                 Cmd_ForwardStringToServer("new");
1068 }
1069
1070 int NetConn_IsLocalGame(void)
1071 {
1072         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
1073                 return true;
1074         return false;
1075 }
1076
1077 static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1078 {
1079         qboolean fromserver;
1080         int ret, c, control;
1081         const char *s;
1082         char *string, addressstring2[128], cname[128], ipstring[32];
1083         char stringbuf[16384];
1084
1085         // quakeworld ingame packet
1086         fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress);
1087
1088         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1089         {
1090                 // received a command string - strip off the packaging and put it
1091                 // into our string buffer with NULL termination
1092                 data += 4;
1093                 length -= 4;
1094                 length = min(length, (int)sizeof(stringbuf) - 1);
1095                 memcpy(stringbuf, data, length);
1096                 stringbuf[length] = 0;
1097                 string = stringbuf;
1098
1099                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1100
1101                 if (developer_networking.integer)
1102                 {
1103                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
1104                         Com_HexDumpToConsole(data, length);
1105                 }
1106
1107                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
1108                 {
1109                         // darkplaces or quake3
1110                         char protocolnames[1400];
1111                         Protocol_Names(protocolnames, sizeof(protocolnames));
1112                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
1113                         M_Update_Return_Reason("Got challenge response");
1114                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s\\challenge\\%s", protocolnames, string + 10), peeraddress);
1115                         return true;
1116                 }
1117                 if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')))
1118                 {
1119                         // quakeworld
1120                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1121                         Con_Printf("\"%s\" received, sending QuakeWorld connect request back to %s\n", string, addressstring2);
1122                         M_Update_Return_Reason("Got QuakeWorld challenge response");
1123                         cls.qw_qport = qport.integer;
1124                         NetConn_WriteString(mysocket, va("\377\377\377\377connect 28 %i %i \"%s\"\n", cls.qw_qport, atoi(string + 1), cls.userinfo), peeraddress);
1125                 }
1126                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
1127                 {
1128                         // darkplaces or quake3
1129                         M_Update_Return_Reason("Accepted");
1130                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3);
1131                         return true;
1132                 }
1133                 if (length > 1 && string[0] == 'j' && cls.connect_trying)
1134                 {
1135                         // quakeworld
1136                         M_Update_Return_Reason("QuakeWorld Accepted");
1137                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
1138                         return true;
1139                 }
1140                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
1141                 {
1142                         char rejectreason[32];
1143                         cls.connect_trying = false;
1144                         string += 7;
1145                         length = max(length - 7, (int)sizeof(rejectreason) - 1);
1146                         memcpy(rejectreason, string, length);
1147                         rejectreason[length] = 0;
1148                         M_Update_Return_Reason(rejectreason);
1149                         return true;
1150                 }
1151                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
1152                 {
1153                         serverlist_info_t *info;
1154                         int n;
1155                         double pingtime;
1156
1157                         string += 13;
1158                         // serverlist only uses text addresses
1159                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
1160                         // search the cache for this server and update it
1161                         for( n = 0; n < serverlist_cachecount; n++ )
1162                                 if( !strcmp( cname, serverlist_cache[n].info.cname ) )
1163                                         break;
1164                         if( n == serverlist_cachecount ) {
1165                                 // LAN search doesnt require an answer from the master server so we wont
1166                                 // know the ping nor will it be initialized already...
1167
1168                                 // find a slot
1169                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1170                                         return true;
1171
1172                                 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1173                                 // store the data the engine cares about (address and ping)
1174                                 strlcpy (serverlist_cache[serverlist_cachecount].info.cname, cname, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1175                                 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1176                                 //serverlist_cache[serverlist_cachecount].querytime = realtime;
1177                                 serverlist_cache[serverlist_cachecount].querytime = Sys_DoubleTime();
1178                                 // if not in the slist menu we should print the server to console
1179                                 if (serverlist_consoleoutput) {
1180                                         Con_Printf("querying %s\n", ipstring);
1181                                 }
1182
1183                                 ++serverlist_cachecount;
1184                         }
1185
1186                         info = &serverlist_cache[n].info;
1187                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(info->game, s, sizeof (info->game));else info->game[0] = 0;
1188                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
1189                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
1190                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1191                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) info->protocol = atoi(s);else info->protocol = -1;
1192                         if ((s = SearchInfostring(string, "clients"      )) != NULL) info->numplayers = atoi(s);else info->numplayers = 0;
1193                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
1194                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
1195
1196                         if (info->ping == 100000)
1197                                         serverreplycount++;
1198
1199                         // update the ping
1200                         pingtime = (int)((Sys_DoubleTime() - serverlist_cache[n].querytime) * 1000.0 + 0.5);
1201                         pingtime = bound(0, pingtime, 9999);
1202                         info->ping = min(info->ping, pingtime);
1203
1204                         // legacy/old stuff move it to the menu ASAP
1205
1206                         // build description strings for the things users care about
1207                         dpsnprintf(serverlist_cache[n].line1, sizeof(serverlist_cache[n].line1), "^%c%5d^7 ^%c%3u^7/%3u %-65.65s", info->ping >= 300 ? '1' : (info->ping >= 200 ? '3' : '7'), (int)info->ping, ((info->numplayers > 0 && info->numplayers < info->maxplayers) ? (info->numplayers >= 4 ? '7' : '3') : '1'), info->numplayers, info->maxplayers, info->name);
1208                         dpsnprintf(serverlist_cache[n].line2, sizeof(serverlist_cache[n].line2), "^5%-21.21s %-19.19s ^%c%-17.17s^5 %-20.20s", info->cname, info->game, (info->gameversion != gameversion.integer) ? '1' : '5', info->mod, info->map);
1209                         if( serverlist_cache[n].query == SQS_QUERIED ) {
1210                                 ServerList_ViewList_Remove( &serverlist_cache[n] );
1211                         }
1212                         // if not in the slist menu we should print the server to console (if wanted)
1213                         else if( serverlist_consoleoutput )
1214                                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1215                         // and finally, update the view set
1216                         ServerList_ViewList_Insert( &serverlist_cache[n] );
1217                         serverlist_cache[n].query = SQS_QUERIED;
1218
1219                         return true;
1220                 }
1221                 if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1222                 {
1223                         // Extract the IP addresses
1224                         data += 18;
1225                         length -= 18;
1226                         masterreplycount++;
1227                         if (serverlist_consoleoutput)
1228                                 Con_Print("received DarkPlaces server list...\n");
1229                         while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
1230                         {
1231                                 int n;
1232
1233                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], data[5] * 256 + data[6]);
1234                                 if (serverlist_consoleoutput && developer_networking.integer)
1235                                         Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring);
1236                                 // ignore the rest of the message if the serverlist is full
1237                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1238                                         break;
1239                                 // also ignore it if we have already queried it (other master server response)
1240                                 for( n = 0 ; n < serverlist_cachecount ; n++ )
1241                                         if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1242                                                 break;
1243                                 if( n >= serverlist_cachecount )
1244                                 {
1245                                         serverquerycount++;
1246
1247                                         memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1248                                         serverlist_cache[serverlist_cachecount].protocol = PROTOCOL_DARKPLACES7;
1249                                         // store the data the engine cares about (address and ping)
1250                                         strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1251                                         serverlist_cache[serverlist_cachecount].info.ping = 100000;
1252                                         serverlist_cache[serverlist_cachecount].query = SQS_QUERYING;
1253
1254                                         ++serverlist_cachecount;
1255                                 }
1256
1257                                 // move on to next address in packet
1258                                 data += 7;
1259                                 length -= 7;
1260                         }
1261                         // begin or resume serverlist queries
1262                         serverlist_querysleep = false;
1263                         serverlist_querywaittime = realtime + 3;
1264                         return true;
1265                 }
1266                 if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1267                 {
1268                         // Extract the IP addresses
1269                         data += 2;
1270                         length -= 2;
1271                         masterreplycount++;
1272                         if (serverlist_consoleoutput)
1273                                 Con_Printf("received QuakeWorld server list from %s...\n", addressstring2);
1274                         while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0)
1275                         {
1276                                 int n;
1277
1278                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]);
1279                                 if (serverlist_consoleoutput && developer_networking.integer)
1280                                         Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring);
1281                                 // ignore the rest of the message if the serverlist is full
1282                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1283                                         break;
1284                                 // also ignore it if we have already queried it (other master server response)
1285                                 for( n = 0 ; n < serverlist_cachecount ; n++ )
1286                                         if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1287                                                 break;
1288                                 if( n >= serverlist_cachecount )
1289                                 {
1290                                         serverquerycount++;
1291
1292                                         memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1293                                         serverlist_cache[serverlist_cachecount].protocol = PROTOCOL_QUAKEWORLD;
1294                                         // store the data the engine cares about (address and ping)
1295                                         strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1296                                         serverlist_cache[serverlist_cachecount].info.ping = 100000;
1297                                         serverlist_cache[serverlist_cachecount].query = SQS_QUERYING;
1298
1299                                         ++serverlist_cachecount;
1300                                 }
1301
1302                                 // move on to next address in packet
1303                                 data += 6;
1304                                 length -= 6;
1305                         }
1306                         // begin or resume serverlist queries
1307                         serverlist_querysleep = false;
1308                         serverlist_querywaittime = realtime + 3;
1309                         return true;
1310                 }
1311                 /*
1312                 if (!strncmp(string, "ping", 4))
1313                 {
1314                         if (developer.integer >= 10)
1315                                 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1316                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1317                         return true;
1318                 }
1319                 if (!strncmp(string, "ack", 3))
1320                         return true;
1321                 */
1322                 // QuakeWorld compatibility
1323                 if (length >= 1 && string[0] == 'j' && cls.connect_trying)
1324                 {
1325                         // accept message
1326                         M_Update_Return_Reason("Accepted");
1327                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
1328                         return true;
1329                 }
1330                 if (length > 1 && string[0] == 'c' && string[1] >= '0' && string[1] <= '9' && cls.connect_trying)
1331                 {
1332                         // challenge message
1333                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1334                         Con_Printf("challenge %s received, sending connect request back to %s\n", string + 1, addressstring2);
1335                         M_Update_Return_Reason("Got challenge response");
1336                         cls.qw_qport = qport.integer;
1337                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1338                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "name", cl_name.string);
1339                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "topcolor", va("%i", (cl_color.integer >> 4) & 15));
1340                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "bottomcolor", va("%i", (cl_color.integer) & 15));
1341                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "rate", va("%i", cl_rate.integer));
1342                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "msg", "1");
1343                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ver", engineversion);
1344                         NetConn_WriteString(mysocket, va("\377\377\377\377connect %i %i %i \"%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo), peeraddress);
1345                         return true;
1346                 }
1347                 if (length > 2 && !memcmp(string, "n\\", 2))
1348                 {
1349                         serverlist_info_t *info;
1350                         int n;
1351                         double pingtime;
1352
1353                         // qw server status
1354                         if (serverlist_consoleoutput && developer_networking.integer >= 2)
1355                                 Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1);
1356
1357                         string += 1;
1358                         // serverlist only uses text addresses
1359                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
1360                         // search the cache for this server and update it
1361                         for( n = 0; n < serverlist_cachecount; n++ )
1362                                 if( !strcmp( cname, serverlist_cache[n].info.cname ) )
1363                                         break;
1364                         if( n == serverlist_cachecount ) {
1365                                 // LAN search doesnt require an answer from the master server so we wont
1366                                 // know the ping nor will it be initialized already...
1367
1368                                 // find a slot
1369                                 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1370                                         return true;
1371
1372                                 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1373                                 // store the data the engine cares about (address and ping)
1374                                 strlcpy (serverlist_cache[serverlist_cachecount].info.cname, cname, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1375                                 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1376                                 //serverlist_cache[serverlist_cachecount].querytime = realtime;
1377                                 serverlist_cache[serverlist_cachecount].querytime = Sys_DoubleTime();
1378                                 // if not in the slist menu we should print the server to console
1379                                 if (serverlist_consoleoutput) {
1380                                         Con_Printf("querying %s\n", ipstring);
1381                                 }
1382
1383                                 ++serverlist_cachecount;
1384                         }
1385
1386                         info = &serverlist_cache[n].info;
1387                         strlcpy(info->game, "QuakeWorld", sizeof(info->game));;
1388                         if ((s = SearchInfostring(string, "*gamedir"     )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
1389                         if ((s = SearchInfostring(string, "map"          )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
1390                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1391                         info->protocol = 0;
1392                         info->numplayers = 0; // updated below
1393                         if ((s = SearchInfostring(string, "maxclients"   )) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
1394                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
1395
1396                         // count active players on server
1397                         // (we could gather more info, but we're just after the number)
1398                         s = strchr(string, '\n');
1399                         if (s)
1400                         {
1401                                 s++;
1402                                 while (s < string + length)
1403                                 {
1404                                         for (;s < string + length && *s != '\n';s++)
1405                                                 ;
1406                                         if (s >= string + length)
1407                                                 break;
1408                                         info->numplayers++;
1409                                         s++;
1410                                 }
1411                         }
1412
1413                         if (info->ping == 100000)
1414                                         serverreplycount++;
1415
1416                         pingtime = (int)((Sys_DoubleTime() - serverlist_cache[n].querytime) * 1000.0 + 0.5);
1417                         pingtime = bound(0, pingtime, 9999);
1418                         // update the ping
1419                         info->ping = min(info->ping, pingtime);
1420
1421                         // legacy/old stuff move it to the menu ASAP
1422
1423                         // build description strings for the things users care about
1424                         dpsnprintf(serverlist_cache[n].line1, sizeof(serverlist_cache[n].line1), "^%c%5d^7 ^%c%3u^7/%3u %-65.65s", info->ping >= 300 ? '1' : (info->ping >= 200 ? '3' : '7'), (int)info->ping, ((info->numplayers > 0 && info->numplayers < info->maxplayers) ? (info->numplayers >= 4 ? '7' : '3') : '1'), info->numplayers, info->maxplayers, info->name);
1425                         dpsnprintf(serverlist_cache[n].line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s ^%c%-17.17s^4 %-20.20s", info->cname, info->game, (info->gameversion != gameversion.integer) ? '1' : '4', info->mod, info->map);
1426                         if( serverlist_cache[n].query == SQS_QUERIED ) {
1427                                 ServerList_ViewList_Remove( &serverlist_cache[n] );
1428                         }
1429                         // if not in the slist menu we should print the server to console (if wanted)
1430                         else if( serverlist_consoleoutput )
1431                                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1432                         // and finally, update the view set
1433                         ServerList_ViewList_Insert( &serverlist_cache[n] );
1434                         serverlist_cache[n].query = SQS_QUERIED;
1435
1436                         return true;
1437                 }
1438                 if (string[0] == 'n')
1439                 {
1440                         // qw print command
1441                         Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1);
1442                 }
1443                 // we may not have liked the packet, but it was a command packet, so
1444                 // we're done processing this packet now
1445                 return true;
1446         }
1447         // quakeworld ingame packet
1448         if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol)) == 2)
1449         {
1450                 ret = 0;
1451                 CL_ParseServerMessage();
1452                 return ret;
1453         }
1454         // netquake control packets, supported for compatibility only
1455         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1456         {
1457                 c = data[4];
1458                 data += 5;
1459                 length -= 5;
1460                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1461                 switch (c)
1462                 {
1463                 case CCREP_ACCEPT:
1464                         if (developer.integer >= 10)
1465                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
1466                         if (cls.connect_trying)
1467                         {
1468                                 lhnetaddress_t clientportaddress;
1469                                 clientportaddress = *peeraddress;
1470                                 if (length >= 4)
1471                                 {
1472                                         unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
1473                                         data += 4;
1474                                         length -= 4;
1475                                         LHNETADDRESS_SetPort(&clientportaddress, port);
1476                                 }
1477                                 M_Update_Return_Reason("Accepted");
1478                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE);
1479                         }
1480                         break;
1481                 case CCREP_REJECT:
1482                         if (developer.integer >= 10)
1483                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
1484                         cls.connect_trying = false;
1485                         M_Update_Return_Reason((char *)data);
1486                         break;
1487 #if 0
1488                 case CCREP_SERVER_INFO:
1489                         if (developer.integer >= 10)
1490                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
1491                         if (cls.state != ca_dedicated)
1492                         {
1493                                 // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address
1494                                 // string we just ignore it and keep the real address
1495                                 MSG_ReadString();
1496                                 // serverlist only uses text addresses
1497                                 cname = UDP_AddrToString(readaddr);
1498                                 // search the cache for this server
1499                                 for (n = 0; n < hostCacheCount; n++)
1500                                         if (!strcmp(cname, serverlist[n].cname))
1501                                                 break;
1502                                 // add it
1503                                 if (n == hostCacheCount && hostCacheCount < SERVERLISTSIZE)
1504                                 {
1505                                         hostCacheCount++;
1506                                         memset(&serverlist[n], 0, sizeof(serverlist[n]));
1507                                         strlcpy (serverlist[n].name, MSG_ReadString(), sizeof (serverlist[n].name));
1508                                         strlcpy (serverlist[n].map, MSG_ReadString(), sizeof (serverlist[n].map));
1509                                         serverlist[n].users = MSG_ReadByte();
1510                                         serverlist[n].maxusers = MSG_ReadByte();
1511                                         c = MSG_ReadByte();
1512                                         if (c != NET_PROTOCOL_VERSION)
1513                                         {
1514                                                 strlcpy (serverlist[n].cname, serverlist[n].name, sizeof (serverlist[n].cname));
1515                                                 strcpy(serverlist[n].name, "*");
1516                                                 strlcat (serverlist[n].name, serverlist[n].cname, sizeof(serverlist[n].name));
1517                                         }
1518                                         strlcpy (serverlist[n].cname, cname, sizeof (serverlist[n].cname));
1519                                 }
1520                         }
1521                         break;
1522                 case CCREP_PLAYER_INFO:
1523                         // we got a CCREP_PLAYER_INFO??
1524                         //if (developer.integer >= 10)
1525                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
1526                         break;
1527                 case CCREP_RULE_INFO:
1528                         // we got a CCREP_RULE_INFO??
1529                         //if (developer.integer >= 10)
1530                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
1531                         break;
1532 #endif
1533                 default:
1534                         break;
1535                 }
1536                 // we may not have liked the packet, but it was a valid control
1537                 // packet, so we're done processing this packet now
1538                 return true;
1539         }
1540         ret = 0;
1541         if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol)) == 2)
1542                 CL_ParseServerMessage();
1543         return ret;
1544 }
1545
1546 void NetConn_QueryQueueFrame(void)
1547 {
1548         int index;
1549         int queries;
1550         int maxqueries;
1551         double timeouttime;
1552         static double querycounter = 0;
1553
1554         if (serverlist_querysleep)
1555                 return;
1556
1557         // apply a cool down time after master server replies,
1558         // to avoid messing up the ping times on the servers
1559         if (serverlist_querywaittime > realtime)
1560                 return;
1561
1562         // each time querycounter reaches 1.0 issue a query
1563         querycounter += cl.realframetime * net_slist_queriespersecond.value;
1564         maxqueries = (int)querycounter;
1565         maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer);
1566         querycounter -= maxqueries;
1567
1568         if( maxqueries == 0 ) {
1569                 return;
1570         }
1571
1572         // scan serverlist and issue queries as needed
1573     serverlist_querysleep = true;
1574
1575         timeouttime = realtime - net_slist_timeout.value;
1576         for( index = 0, queries = 0 ; index < serverlist_cachecount && queries < maxqueries ; index++ )
1577         {
1578                 serverlist_entry_t *entry = &serverlist_cache[ index ];
1579                 if( entry->query != SQS_QUERYING )
1580                 {
1581                         continue;
1582                 }
1583
1584         serverlist_querysleep = false;
1585                 if( entry->querycounter != 0 && entry->querytime > timeouttime )
1586                 {
1587                         continue;
1588                 }
1589
1590                 if( entry->querycounter != (unsigned) net_slist_maxtries.integer )
1591                 {
1592                         lhnetaddress_t address;
1593                         int socket;
1594
1595                         LHNETADDRESS_FromString(&address, entry->info.cname, 0);
1596                         if (entry->protocol == PROTOCOL_QUAKEWORLD)
1597                         {
1598                                 for (socket = 0; socket < cl_numsockets ; socket++)
1599                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address);
1600                         }
1601                         else
1602                         {
1603                                 for (socket = 0; socket < cl_numsockets ; socket++)
1604                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getinfo", &address);
1605                         }
1606
1607                         //entry->querytime = realtime;
1608                         entry->querytime = Sys_DoubleTime();
1609                         entry->querycounter++;
1610
1611                         // if not in the slist menu we should print the server to console
1612                         if (serverlist_consoleoutput)
1613                                 Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter);
1614
1615                         queries++;
1616                 }
1617                 else
1618                 {
1619                         entry->query = SQS_TIMEDOUT;
1620                 }
1621         }
1622 }
1623
1624 void NetConn_ClientFrame(void)
1625 {
1626         int i, length;
1627         lhnetaddress_t peeraddress;
1628         NetConn_UpdateSockets();
1629         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
1630         {
1631                 if (cls.connect_remainingtries == 0)
1632                         M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
1633                 cls.connect_nextsendtime = realtime + 1;
1634                 cls.connect_remainingtries--;
1635                 if (cls.connect_remainingtries <= -10)
1636                 {
1637                         cls.connect_trying = false;
1638                         M_Update_Return_Reason("Connect: Failed");
1639                         return;
1640                 }
1641                 // try challenge first (newer DP server or QW)
1642                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
1643                 // then try netquake as a fallback (old server, or netquake)
1644                 SZ_Clear(&net_message);
1645                 // save space for the header, filled in later
1646                 MSG_WriteLong(&net_message, 0);
1647                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
1648                 MSG_WriteString(&net_message, "QUAKE");
1649                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1650                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1651                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
1652                 SZ_Clear(&net_message);
1653         }
1654         for (i = 0;i < cl_numsockets;i++)
1655                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1656                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
1657         NetConn_QueryQueueFrame();
1658         if (cls.netcon && realtime > cls.netcon->timeout)
1659         {
1660                 Con_Print("Connection timed out\n");
1661                 CL_Disconnect();
1662                 Host_ShutdownServer ();
1663         }
1664 }
1665
1666 #define MAX_CHALLENGES 128
1667 struct challenge_s
1668 {
1669         lhnetaddress_t address;
1670         double time;
1671         char string[12];
1672 }
1673 challenge[MAX_CHALLENGES];
1674
1675 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
1676 {
1677         int i;
1678         char c;
1679         for (i = 0;i < bufferlength - 1;i++)
1680         {
1681                 do
1682                 {
1683                         c = rand () % (127 - 33) + 33;
1684                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
1685                 buffer[i] = c;
1686         }
1687         buffer[i] = 0;
1688 }
1689
1690 static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus)
1691 {
1692         unsigned int nb_clients = 0, i;
1693         int length;
1694
1695         // How many clients are there?
1696         for (i = 0;i < (unsigned int)svs.maxclients;i++)
1697                 if (svs.clients[i].active)
1698                         nb_clients++;
1699
1700         // TODO: we should add more information for the full status string
1701         length = dpsnprintf(out_msg, out_size,
1702                                                 "\377\377\377\377%s\x0A"
1703                                                 "\\gamename\\%s\\modname\\%s\\gameversion\\%d\\sv_maxclients\\%d"
1704                                                 "\\clients\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d"
1705                                                 "%s%s"
1706                                                 "%s",
1707                                                 fullstatus ? "statusResponse" : "infoResponse",
1708                                                 gamename, com_modname, gameversion.integer, svs.maxclients,
1709                                                 nb_clients, sv.name, hostname.string, NET_PROTOCOL_VERSION,
1710                                                 challenge ? "\\challenge\\" : "", challenge ? challenge : "",
1711                                                 fullstatus ? "\n" : "");
1712
1713         // Make sure it fits in the buffer
1714         if (length < 0)
1715                 return false;
1716
1717         if (fullstatus)
1718         {
1719                 char *ptr;
1720                 int left;
1721
1722                 ptr = out_msg + length;
1723                 left = (int)out_size - length;
1724
1725                 for (i = 0;i < (unsigned int)svs.maxclients;i++)
1726                 {
1727                         client_t *cl = &svs.clients[i];
1728                         if (cl->active)
1729                         {
1730                                 int nameind, cleanind;
1731                                 char curchar;
1732                                 char cleanname [sizeof(cl->name)];
1733
1734                                 // Remove all characters '"' and '\' in the player name
1735                                 nameind = 0;
1736                                 cleanind = 0;
1737                                 do
1738                                 {
1739                                         curchar = cl->name[nameind++];
1740                                         if (curchar != '"' && curchar != '\\')
1741                                         {
1742                                                 cleanname[cleanind++] = curchar;
1743                                                 if (cleanind == sizeof(cleanname) - 1)
1744                                                         break;
1745                                         }
1746                                 } while (curchar != '\0');
1747
1748                                 length = dpsnprintf(ptr, left, "%d %d \"%s\"\n",
1749                                                                         cl->frags,
1750                                                                         (int)(cl->ping * 1000.0f),
1751                                                                         cleanname);
1752                                 if(length < 0)
1753                                         return false;
1754                                 left -= length;
1755                                 ptr += length;
1756                         }
1757                 }
1758         }
1759
1760         return true;
1761 }
1762
1763 extern void SV_SendServerinfo (client_t *client);
1764 static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1765 {
1766         int i, ret, clientnum, best;
1767         double besttime;
1768         client_t *client;
1769         netconn_t *conn;
1770         char *s, *string, response[1400], addressstring2[128], stringbuf[16384];
1771
1772         // see if we can identify the sender as a local player
1773         // (this is necessary for rcon to send a reliable reply if the client is
1774         //  actually on the server, not sending remotely)
1775         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1776                 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1777                         break;
1778         if (i == svs.maxclients)
1779                 host_client = NULL;
1780
1781         if (sv.active)
1782         {
1783                 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1784                 {
1785                         // received a command string - strip off the packaging and put it
1786                         // into our string buffer with NULL termination
1787                         data += 4;
1788                         length -= 4;
1789                         length = min(length, (int)sizeof(stringbuf) - 1);
1790                         memcpy(stringbuf, data, length);
1791                         stringbuf[length] = 0;
1792                         string = stringbuf;
1793
1794                         if (developer.integer >= 10)
1795                         {
1796                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1797                                 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1798                                 Com_HexDumpToConsole(data, length);
1799                         }
1800
1801                         if (length >= 12 && !memcmp(string, "getchallenge", 12))
1802                         {
1803                                 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1804                                 {
1805                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1806                                                 break;
1807                                         if (besttime > challenge[i].time)
1808                                                 besttime = challenge[best = i].time;
1809                                 }
1810                                 // if we did not find an exact match, choose the oldest and
1811                                 // update address and string
1812                                 if (i == MAX_CHALLENGES)
1813                                 {
1814                                         i = best;
1815                                         challenge[i].address = *peeraddress;
1816                                         NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1817                                 }
1818                                 challenge[i].time = realtime;
1819                                 // send the challenge
1820                                 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1821                                 return true;
1822                         }
1823                         if (length > 8 && !memcmp(string, "connect\\", 8))
1824                         {
1825                                 string += 7;
1826                                 length -= 7;
1827                                 if ((s = SearchInfostring(string, "challenge")))
1828                                 {
1829                                         // validate the challenge
1830                                         for (i = 0;i < MAX_CHALLENGES;i++)
1831                                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1832                                                         break;
1833                                         if (i < MAX_CHALLENGES)
1834                                         {
1835                                                 // check engine protocol
1836                                                 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1837                                                 {
1838                                                         if (developer.integer >= 10)
1839                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1840                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1841                                                 }
1842                                                 else
1843                                                 {
1844                                                         // see if this is a duplicate connection request
1845                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1846                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1847                                                                         break;
1848                                                         if (clientnum < svs.maxclients && realtime - client->connecttime < net_messagerejointimeout.value)
1849                                                         {
1850                                                                 // client is still trying to connect,
1851                                                                 // so we send a duplicate reply
1852                                                                 if (developer.integer >= 10)
1853                                                                         Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1854                                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1855                                                         }
1856 #if 0
1857                                                         else if (clientnum < svs.maxclients)
1858                                                         {
1859                                                                 if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1860                                                                 {
1861                                                                         // client crashed and is coming back, keep their stuff intact
1862                                                                         SV_SendServerinfo(client);
1863                                                                         //host_client = client;
1864                                                                         //SV_DropClient (true);
1865                                                                 }
1866                                                                 // else ignore them
1867                                                         }
1868 #endif
1869                                                         else
1870                                                         {
1871                                                                 // this is a new client, find a slot
1872                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1873                                                                         if (!client->active)
1874                                                                                 break;
1875                                                                 if (clientnum < svs.maxclients)
1876                                                                 {
1877                                                                         // prepare the client struct
1878                                                                         if ((conn = NetConn_Open(mysocket, peeraddress)))
1879                                                                         {
1880                                                                                 // allocated connection
1881                                                                                 LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true);
1882                                                                                 if (developer.integer >= 10)
1883                                                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1884                                                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1885                                                                                 // now set up the client
1886                                                                                 SV_VM_Begin();
1887                                                                                 SV_ConnectClient(clientnum, conn);
1888                                                                                 SV_VM_End();
1889                                                                                 NetConn_Heartbeat(1);
1890                                                                         }
1891                                                                 }
1892                                                                 else
1893                                                                 {
1894                                                                         // server is full
1895                                                                         if (developer.integer >= 10)
1896                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1897                                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1898                                                                 }
1899                                                         }
1900                                                 }
1901                                         }
1902                                 }
1903                                 return true;
1904                         }
1905                         if (length >= 7 && !memcmp(string, "getinfo", 7))
1906                         {
1907                                 const char *challenge = NULL;
1908
1909                                 // If there was a challenge in the getinfo message
1910                                 if (length > 8 && string[7] == ' ')
1911                                         challenge = string + 8;
1912
1913                                 if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false))
1914                                 {
1915                                         if (developer.integer >= 10)
1916                                                 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1917                                         NetConn_WriteString(mysocket, response, peeraddress);
1918                                 }
1919                                 return true;
1920                         }
1921                         if (length >= 9 && !memcmp(string, "getstatus", 9))
1922                         {
1923                                 const char *challenge = NULL;
1924
1925                                 // If there was a challenge in the getinfo message
1926                                 if (length > 10 && string[9] == ' ')
1927                                         challenge = string + 10;
1928
1929                                 if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true))
1930                                 {
1931                                         if (developer.integer >= 10)
1932                                                 Con_Printf("Sending reply to client %s - %s\n", addressstring2, response);
1933                                         NetConn_WriteString(mysocket, response, peeraddress);
1934                                 }
1935                                 return true;
1936                         }
1937                         if (length >= 5 && !memcmp(string, "rcon ", 5))
1938                         {
1939                                 int i;
1940                                 char *s = string + 5;
1941                                 char password[64];
1942                                 for (i = 0;*s > ' ';s++)
1943                                         if (i < (int)sizeof(password) - 1)
1944                                                 password[i++] = *s;
1945                                 password[i] = 0;
1946                                 if (password[0] > ' ' && !strcmp(rcon_password.string, password))
1947                                 {
1948                                         // looks like a legitimate rcon command with the correct password
1949                                         Con_Printf("server received rcon command from %s:\n%s\n", host_client ? host_client->name : addressstring2, s);
1950                                         rcon_redirect = true;
1951                                         rcon_redirect_bufferpos = 0;
1952                                         Cmd_ExecuteString(s, src_command);
1953                                         rcon_redirect_buffer[rcon_redirect_bufferpos] = 0;
1954                                         rcon_redirect = false;
1955                                         // print resulting text to client
1956                                         // if client is playing, send a reliable reply instead of
1957                                         // a command packet
1958                                         if (host_client)
1959                                         {
1960                                                 // if the netconnection is loop, then this is the
1961                                                 // local player on a listen mode server, and it would
1962                                                 // result in duplicate printing to the console
1963                                                 // (not that the local player should be using rcon
1964                                                 //  when they have the console)
1965                                                 if (host_client->netconnection && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
1966                                                         SV_ClientPrintf("%s", rcon_redirect_buffer);
1967                                         }
1968                                         else
1969                                         {
1970                                                 // qw print command
1971                                                 dpsnprintf(response, sizeof(response), "\377\377\377\377n%s", rcon_redirect_buffer);
1972                                                 NetConn_WriteString(mysocket, response, peeraddress);
1973                                         }
1974                                 }
1975                                 return true;
1976                         }
1977                         /*
1978                         if (!strncmp(string, "ping", 4))
1979                         {
1980                                 if (developer.integer >= 10)
1981                                         Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1982                                 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1983                                 return true;
1984                         }
1985                         if (!strncmp(string, "ack", 3))
1986                                 return true;
1987                         */
1988                         // we may not have liked the packet, but it was a command packet, so
1989                         // we're done processing this packet now
1990                         return true;
1991                 }
1992                 // LordHavoc: disabled netquake control packet support in server
1993 #if 0
1994                 {
1995                         int c, control;
1996                         // netquake control packets, supported for compatibility only
1997                         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1998                         {
1999                                 c = data[4];
2000                                 data += 5;
2001                                 length -= 5;
2002                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
2003                                 switch (c)
2004                                 {
2005                                 case CCREQ_CONNECT:
2006                                         if (developer.integer >= 10)
2007                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
2008                                         if (length >= (int)strlen("QUAKE") + 1 + 1)
2009                                         {
2010                                                 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
2011                                                 {
2012                                                         if (developer.integer >= 10)
2013                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
2014                                                         SZ_Clear(&net_message);
2015                                                         // save space for the header, filled in later
2016                                                         MSG_WriteLong(&net_message, 0);
2017                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
2018                                                         MSG_WriteString(&net_message, "Incompatible version.\n");
2019                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2020                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2021                                                         SZ_Clear(&net_message);
2022                                                 }
2023                                                 else
2024                                                 {
2025                                                         // see if this is a duplicate connection request
2026                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2027                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
2028                                                                         break;
2029                                                         if (clientnum < svs.maxclients)
2030                                                         {
2031                                                                 // duplicate connection request
2032                                                                 if (realtime - client->connecttime < 2.0)
2033                                                                 {
2034                                                                         // client is still trying to connect,
2035                                                                         // so we send a duplicate reply
2036                                                                         if (developer.integer >= 10)
2037                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
2038                                                                         SZ_Clear(&net_message);
2039                                                                         // save space for the header, filled in later
2040                                                                         MSG_WriteLong(&net_message, 0);
2041                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
2042                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
2043                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2044                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2045                                                                         SZ_Clear(&net_message);
2046                                                                 }
2047 #if 0
2048                                                                 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
2049                                                                 {
2050                                                                         SV_SendServerinfo(client);
2051                                                                         // the old client hasn't sent us anything
2052                                                                         // in quite a while, so kick off and let
2053                                                                         // the retry take care of it...
2054                                                                         //host_client = client;
2055                                                                         //SV_DropClient (true);
2056                                                                 }
2057 #endif
2058                                                         }
2059                                                         else
2060                                                         {
2061                                                                 // this is a new client, find a slot
2062                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2063                                                                         if (!client->active)
2064                                                                                 break;
2065                                                                 if (clientnum < svs.maxclients && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
2066                                                                 {
2067                                                                         // connect to the client
2068                                                                         // everything is allocated, just fill in the details
2069                                                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
2070                                                                         if (developer.integer >= 10)
2071                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
2072                                                                         // send back the info about the server connection
2073                                                                         SZ_Clear(&net_message);
2074                                                                         // save space for the header, filled in later
2075                                                                         MSG_WriteLong(&net_message, 0);
2076                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
2077                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
2078                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2079                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2080                                                                         SZ_Clear(&net_message);
2081                                                                         // now set up the client struct
2082                                                                         SV_VM_Begin();
2083                                                                         SV_ConnectClient(clientnum, conn);
2084                                                                         SV_VM_End();
2085                                                                         NetConn_Heartbeat(1);
2086                                                                 }
2087                                                                 else
2088                                                                 {
2089                                                                         if (developer.integer >= 10)
2090                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
2091                                                                         // no room; try to let player know
2092                                                                         SZ_Clear(&net_message);
2093                                                                         // save space for the header, filled in later
2094                                                                         MSG_WriteLong(&net_message, 0);
2095                                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
2096                                                                         MSG_WriteString(&net_message, "Server is full.\n");
2097                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2098                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2099                                                                         SZ_Clear(&net_message);
2100                                                                 }
2101                                                         }
2102                                                 }
2103                                         }
2104                                         break;
2105 #if 0
2106                                 case CCREQ_SERVER_INFO:
2107                                         if (developer.integer >= 10)
2108                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
2109                                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
2110                                         {
2111                                                 if (developer.integer >= 10)
2112                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
2113                                                 SZ_Clear(&net_message);
2114                                                 // save space for the header, filled in later
2115                                                 MSG_WriteLong(&net_message, 0);
2116                                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
2117                                                 UDP_GetSocketAddr(UDP_acceptSock, &newaddr);
2118                                                 MSG_WriteString(&net_message, UDP_AddrToString(&newaddr));
2119                                                 MSG_WriteString(&net_message, hostname.string);
2120                                                 MSG_WriteString(&net_message, sv.name);
2121                                                 MSG_WriteByte(&net_message, net_activeconnections);
2122                                                 MSG_WriteByte(&net_message, svs.maxclients);
2123                                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2124                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2125                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2126                                                 SZ_Clear(&net_message);
2127                                         }
2128                                         break;
2129                                 case CCREQ_PLAYER_INFO:
2130                                         if (developer.integer >= 10)
2131                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
2132                                         if (sv.active)
2133                                         {
2134                                                 int playerNumber, activeNumber, clientNumber;
2135                                                 client_t *client;
2136
2137                                                 playerNumber = MSG_ReadByte();
2138                                                 activeNumber = -1;
2139                                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
2140                                                         if (client->active && ++activeNumber == playerNumber)
2141                                                                 break;
2142                                                 if (clientNumber != svs.maxclients)
2143                                                 {
2144                                                         SZ_Clear(&net_message);
2145                                                         // save space for the header, filled in later
2146                                                         MSG_WriteLong(&net_message, 0);
2147                                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
2148                                                         MSG_WriteByte(&net_message, playerNumber);
2149                                                         MSG_WriteString(&net_message, client->name);
2150                                                         MSG_WriteLong(&net_message, client->colors);
2151                                                         MSG_WriteLong(&net_message, (int)client->edict->fields.server->frags);
2152                                                         MSG_WriteLong(&net_message, (int)(realtime - client->connecttime));
2153                                                         MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient");
2154                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2155                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2156                                                         SZ_Clear(&net_message);
2157                                                 }
2158                                         }
2159                                         break;
2160                                 case CCREQ_RULE_INFO:
2161                                         if (developer.integer >= 10)
2162                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
2163                                         if (sv.active)
2164                                         {
2165                                                 char *prevCvarName;
2166                                                 cvar_t *var;
2167
2168                                                 // find the search start location
2169                                                 prevCvarName = MSG_ReadString();
2170                                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
2171
2172                                                 // send the response
2173                                                 SZ_Clear(&net_message);
2174                                                 // save space for the header, filled in later
2175                                                 MSG_WriteLong(&net_message, 0);
2176                                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
2177                                                 if (var)
2178                                                 {
2179                                                         MSG_WriteString(&net_message, var->name);
2180                                                         MSG_WriteString(&net_message, var->string);
2181                                                 }
2182                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2183                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
2184                                                 SZ_Clear(&net_message);
2185                                         }
2186                                         break;
2187 #endif
2188                                 default:
2189                                         break;
2190                                 }
2191                                 // we may not have liked the packet, but it was a valid control
2192                                 // packet, so we're done processing this packet now
2193                                 return true;
2194                         }
2195                 }
2196 #endif
2197                 if (host_client)
2198                 {
2199                         if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol)) == 2)
2200                         {
2201                                 SV_VM_Begin();
2202                                 SV_ReadClientMessage();
2203                                 SV_VM_End();
2204                                 return ret;
2205                         }
2206                 }
2207         }
2208         return 0;
2209 }
2210
2211 void NetConn_ServerFrame(void)
2212 {
2213         int i, length;
2214         lhnetaddress_t peeraddress;
2215         for (i = 0;i < sv_numsockets;i++)
2216                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2217                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
2218         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2219         {
2220                 // never timeout loopback connections
2221                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2222                 {
2223                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
2224                         SV_VM_Begin();
2225                         SV_DropClient(false);
2226                         SV_VM_End();
2227                 }
2228         }
2229 }
2230
2231 void NetConn_QueryMasters(qboolean querydp, qboolean queryqw)
2232 {
2233         int i;
2234         int masternum;
2235         lhnetaddress_t masteraddress;
2236         lhnetaddress_t broadcastaddress;
2237         char request[256];
2238
2239         if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
2240                 return;
2241
2242         // 26000 is the default quake server port, servers on other ports will not
2243         // be found
2244         // note this is IPv4-only, I doubt there are IPv6-only LANs out there
2245         LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
2246
2247         if (querydp)
2248         {
2249                 for (i = 0;i < cl_numsockets;i++)
2250                 {
2251                         if (cl_sockets[i])
2252                         {
2253                                 // search LAN for Quake servers
2254                                 SZ_Clear(&net_message);
2255                                 // save space for the header, filled in later
2256                                 MSG_WriteLong(&net_message, 0);
2257                                 MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
2258                                 MSG_WriteString(&net_message, "QUAKE");
2259                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2260                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2261                                 NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress);
2262                                 SZ_Clear(&net_message);
2263
2264                                 // search LAN for DarkPlaces servers
2265                                 NetConn_WriteString(cl_sockets[i], "\377\377\377\377getinfo", &broadcastaddress);
2266
2267                                 // build the getservers message to send to the dpmaster master servers
2268                                 dpsnprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
2269
2270                                 // search internet
2271                                 for (masternum = 0;sv_masters[masternum].name;masternum++)
2272                                 {
2273                                         if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
2274                                         {
2275                                                 masterquerycount++;
2276                                                 NetConn_WriteString(cl_sockets[i], request, &masteraddress);
2277                                         }
2278                                 }
2279                         }
2280                 }
2281         }
2282
2283         // only query QuakeWorld servers when the user wants to
2284         if (queryqw)
2285         {
2286                 for (i = 0;i < cl_numsockets;i++)
2287                 {
2288                         if (cl_sockets[i])
2289                         {
2290                                 // search LAN for QuakeWorld servers
2291                                 NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &broadcastaddress);
2292
2293                                 // build the getservers message to send to the qwmaster master servers
2294                                 // note this has no -1 prefix, and the trailing nul byte is sent
2295                                 dpsnprintf(request, sizeof(request), "c\n");
2296
2297                                 // search internet
2298                                 for (masternum = 0;sv_qwmasters[masternum].name;masternum++)
2299                                 {
2300                                         if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
2301                                         {
2302                                                 if (m_state != m_slist)
2303                                                 {
2304                                                         char lookupstring[128];
2305                                                         LHNETADDRESS_ToString(&masteraddress, lookupstring, sizeof(lookupstring), true);
2306                                                         Con_Printf("Querying master %s (resolved from %s)\n", lookupstring, sv_qwmasters[masternum].string);
2307                                                 }
2308                                                 masterquerycount++;
2309                                                 NetConn_Write(cl_sockets[i], request, strlen(request) + 1, &masteraddress);
2310                                         }
2311                                 }
2312                         }
2313                 }
2314         }
2315         if (!masterquerycount)
2316         {
2317                 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
2318                 M_Update_Return_Reason("No network");
2319         }
2320 }
2321
2322 void NetConn_Heartbeat(int priority)
2323 {
2324         lhnetaddress_t masteraddress;
2325         int masternum;
2326         lhnetsocket_t *mysocket;
2327
2328         // if it's a state change (client connected), limit next heartbeat to no
2329         // more than 30 sec in the future
2330         if (priority == 1 && nextheartbeattime > realtime + 30.0)
2331                 nextheartbeattime = realtime + 30.0;
2332
2333         // limit heartbeatperiod to 30 to 270 second range,
2334         // lower limit is to avoid abusing master servers with excess traffic,
2335         // upper limit is to avoid timing out on the master server (which uses
2336         // 300 sec timeout)
2337         if (sv_heartbeatperiod.value < 30)
2338                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
2339         if (sv_heartbeatperiod.value > 270)
2340                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
2341
2342         // make advertising optional and don't advertise singleplayer games, and
2343         // only send a heartbeat as often as the admin wants
2344         if (sv.active && sv_public.integer && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
2345         {
2346                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
2347                 for (masternum = 0;sv_masters[masternum].name;masternum++)
2348                         if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
2349                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
2350         }
2351 }
2352
2353 static void Net_Heartbeat_f(void)
2354 {
2355         if (sv.active)
2356                 NetConn_Heartbeat(2);
2357         else
2358                 Con_Print("No server running, can not heartbeat to master server.\n");
2359 }
2360
2361 void PrintStats(netconn_t *conn)
2362 {
2363         if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD))
2364                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->qw.outgoing_sequence, conn->qw.incoming_sequence);
2365         else
2366                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence);
2367 }
2368
2369 void Net_Stats_f(void)
2370 {
2371         netconn_t *conn;
2372         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
2373         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
2374         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
2375         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
2376         Con_Printf("packetsSent                = %i\n", packetsSent);
2377         Con_Printf("packetsReSent              = %i\n", packetsReSent);
2378         Con_Printf("packetsReceived            = %i\n", packetsReceived);
2379         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
2380         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
2381         Con_Print("connections                =\n");
2382         for (conn = netconn_list;conn;conn = conn->next)
2383                 PrintStats(conn);
2384 }
2385
2386 void Net_Slist_f(void)
2387 {
2388         ServerList_ResetMasks();
2389         serverlist_sortbyfield = SLIF_PING;
2390         serverlist_sortdescending = false;
2391     if (m_state != m_slist) {
2392                 Con_Print("Sending requests to master servers\n");
2393                 ServerList_QueryList(true, false);
2394                 serverlist_consoleoutput = true;
2395                 Con_Print("Listening for replies...\n");
2396         } else
2397                 ServerList_QueryList(true, false);
2398 }
2399
2400 void Net_SlistQW_f(void)
2401 {
2402         ServerList_ResetMasks();
2403         serverlist_sortbyfield = SLIF_PING;
2404         serverlist_sortdescending = false;
2405     if (m_state != m_slist) {
2406                 Con_Print("Sending requests to master servers\n");
2407                 ServerList_QueryList(false, true);
2408                 serverlist_consoleoutput = true;
2409                 Con_Print("Listening for replies...\n");
2410         } else
2411                 ServerList_QueryList(false, true);
2412 }
2413
2414 void NetConn_Init(void)
2415 {
2416         int i;
2417         lhnetaddress_t tempaddress;
2418         netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
2419         Cmd_AddCommand("net_stats", Net_Stats_f, "print network statistics");
2420         Cmd_AddCommand("net_slist", Net_Slist_f, "query dp master servers and print all server information");
2421         Cmd_AddCommand("net_slistqw", Net_SlistQW_f, "query qw master servers and print all server information");
2422         Cmd_AddCommand("heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)");
2423         Cvar_RegisterVariable(&net_slist_queriespersecond);
2424         Cvar_RegisterVariable(&net_slist_queriesperframe);
2425         Cvar_RegisterVariable(&net_slist_timeout);
2426         Cvar_RegisterVariable(&net_slist_maxtries);
2427         Cvar_RegisterVariable(&net_messagetimeout);
2428         Cvar_RegisterVariable(&net_messagerejointimeout);
2429         Cvar_RegisterVariable(&net_connecttimeout);
2430         Cvar_RegisterVariable(&cl_netlocalping);
2431         Cvar_RegisterVariable(&cl_netpacketloss);
2432         Cvar_RegisterVariable(&hostname);
2433         Cvar_RegisterVariable(&developer_networking);
2434         Cvar_RegisterVariable(&cl_netport);
2435         Cvar_RegisterVariable(&sv_netport);
2436         Cvar_RegisterVariable(&net_address);
2437         //Cvar_RegisterVariable(&net_address_ipv6);
2438         Cvar_RegisterVariable(&sv_public);
2439         Cvar_RegisterVariable(&sv_heartbeatperiod);
2440         for (i = 0;sv_masters[i].name;i++)
2441                 Cvar_RegisterVariable(&sv_masters[i]);
2442         Cvar_RegisterVariable(&gameversion);
2443 // 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.
2444         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
2445         {
2446                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
2447                 {
2448                         Con_Printf("-ip option used, setting net_address to \"%s\"\n");
2449                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
2450                 }
2451                 else
2452                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
2453         }
2454 // 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
2455         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
2456         {
2457                 i = atoi(com_argv[i + 1]);
2458                 if (i >= 0 && i < 65536)
2459                 {
2460                         Con_Printf("-port option used, setting port cvar to %i\n", i);
2461                         Cvar_SetValueQuick(&sv_netport, i);
2462                 }
2463                 else
2464                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
2465         }
2466         cl_numsockets = 0;
2467         sv_numsockets = 0;
2468         net_message.data = net_message_buf;
2469         net_message.maxsize = sizeof(net_message_buf);
2470         net_message.cursize = 0;
2471         LHNET_Init();
2472 }
2473
2474 void NetConn_Shutdown(void)
2475 {
2476         NetConn_CloseClientPorts();
2477         NetConn_CloseServerPorts();
2478         LHNET_Shutdown();
2479 }
2480