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 MASTER_PORT 27950
  27
  28 cvar_t sv_public = {0, "sv_public", "0"};
  29 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "180"};
  30
  31 static cvar_t sv_masters [] =
  32 {
  33         {CVAR_SAVE, "sv_master1", ""},
  34         {CVAR_SAVE, "sv_master2", ""},
  35         {CVAR_SAVE, "sv_master3", ""},
  36         {CVAR_SAVE, "sv_master4", ""},
  37         {0, "sv_masterextra1", "198.88.152.4"},
  38         {0, NULL, NULL}
  39 };
  40
  41 static double nextheartbeattime = 0;
  42
  43 sizebuf_t net_message;
  44
  45 cvar_t net_messagetimeout = {0, "net_messagetimeout","300"};
  46 cvar_t net_messagerejointimeout = {0, "net_messagerejointimeout","10"};
  47 cvar_t net_connecttimeout = {0, "net_connecttimeout","10"};
  48 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED"};
  49 cvar_t developer_networking = {0, "developer_networking", "0"};
  50
  51 cvar_t cl_fakelocalping_min = {0, "cl_fakelocalping_min","0"};
  52 cvar_t cl_fakelocalping_max = {0, "cl_fakelocalping_max","0"};
  53 static cvar_t cl_fakepacketloss_receive = {0, "cl_fakepacketloss_receive","0"};
  54 static cvar_t cl_fakepacketloss_send = {0, "cl_fakepacketloss_send","0"};
  55 static cvar_t sv_fakepacketloss_receive = {0, "sv_fakepacketloss_receive","0"};
  56 static cvar_t sv_fakepacketloss_send = {0, "sv_fakepacketloss_send","0"};
  57
  58
  59 /* statistic counters */
  60 static int packetsSent = 0;
  61 static int packetsReSent = 0;
  62 static int packetsReceived = 0;
  63 static int receivedDuplicateCount = 0;
  64 static int droppedDatagrams = 0;
  65
  66 static int unreliableMessagesSent = 0;
  67 static int unreliableMessagesReceived = 0;
  68 static int reliableMessagesSent = 0;
  69 static int reliableMessagesReceived = 0;
  70
  71 double masterquerytime = -1000;
  72 int masterquerycount = 0;
  73 int masterreplycount = 0;
  74 int serverquerycount = 0;
  75 int serverreplycount = 0;
  76
  77 int hostCacheCount = 0;
  78 hostcache_t hostcache[HOSTCACHESIZE];
  79
  80 static qbyte sendbuffer[NET_MAXMESSAGE];
  81 static qbyte readbuffer[NET_MAXMESSAGE];
  82
  83 int cl_numsockets;
  84 lhnetsocket_t *cl_sockets[16];
  85 int sv_numsockets;
  86 lhnetsocket_t *sv_sockets[16];
  87
  88 netconn_t *netconn_list = NULL;
  89 mempool_t *netconn_mempool = NULL;
  90
  91 cvar_t cl_netport = {0, "cl_port", "0"};
  92 cvar_t cl_netaddress = {0, "cl_netaddress", "0.0.0.0"};
  93 cvar_t cl_netaddress_ipv6 = {0, "cl_netaddress_ipv6", "[0:0:0:0:0:0:0:0]:0"};
  94
  95 cvar_t sv_netport = {0, "port", "26000"};
  96 cvar_t sv_netaddress = {0, "sv_netaddress", "0.0.0.0"};
  97 cvar_t sv_netaddress_ipv6 = {0, "sv_netaddress_ipv6", "[0:0:0:0:0:0:0:0]:26000"};
  98
  99 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
 100 {
 101         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 102         int i;
 103         if (cl_fakepacketloss_receive.integer)
 104                 for (i = 0;i < cl_numsockets;i++)
 105                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_fakepacketloss_receive.integer)
 106                                 return 0;
 107         if (sv_fakepacketloss_receive.integer)
 108                 for (i = 0;i < cl_numsockets;i++)
 109                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_fakepacketloss_receive.integer)
 110                                 return 0;
 111         if (developer_networking.integer && length != 0)
 112         {
 113                 char addressstring[128], addressstring2[128];
 114                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 115                 if (length > 0)
 116                 {
 117                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 118                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
 119                         Com_HexDumpToConsole(data, length);
 120                 }
 121                 else
 122                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
 123         }
 124         return length;
 125 }
 126
 127 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 128 {
 129         int ret;
 130         int i;
 131         if (cl_fakepacketloss_send.integer)
 132                 for (i = 0;i < cl_numsockets;i++)
 133                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_fakepacketloss_send.integer)
 134                                 return length;
 135         if (sv_fakepacketloss_send.integer)
 136                 for (i = 0;i < cl_numsockets;i++)
 137                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_fakepacketloss_send.integer)
 138                                 return length;
 139         ret = LHNET_Write(mysocket, data, length, peeraddress);
 140         if (developer_networking.integer)
 141         {
 142                 char addressstring[128], addressstring2[128];
 143                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 144                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 145                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 146                 Com_HexDumpToConsole(data, length);
 147         }
 148         return ret;
 149 }
 150
 151 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 152 {
 153         // note this does not include the trailing NULL because we add that in the parser
 154         return NetConn_Write(mysocket, string, strlen(string), peeraddress);
 155 }
 156
 157 int NetConn_SendReliableMessage(netconn_t *conn, sizebuf_t *data)
 158 {
 159         unsigned int packetLen;
 160         unsigned int dataLen;
 161         unsigned int eom;
 162         unsigned int *header;
 163
 164 //#ifdef DEBUG
 165         if (data->cursize == 0)
 166                 Sys_Error("Datagram_SendMessage: zero length message\n");
 167
 168         if (data->cursize > NET_MAXMESSAGE)
 169                 Sys_Error("Datagram_SendMessage: message too big %u\n", data->cursize);
 170
 171         if (conn->canSend == false)
 172                 Sys_Error("SendMessage: called with canSend == false\n");
 173 //#endif
 174
 175         memcpy(conn->sendMessage, data->data, data->cursize);
 176         conn->sendMessageLength = data->cursize;
 177
 178         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 179         {
 180                 dataLen = conn->sendMessageLength;
 181                 eom = NETFLAG_EOM;
 182         }
 183         else
 184         {
 185                 dataLen = MAX_PACKETFRAGMENT;
 186                 eom = 0;
 187         }
 188
 189         packetLen = NET_HEADERSIZE + dataLen;
 190
 191         header = (void *)sendbuffer;
 192         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 193         header[1] = BigLong(conn->sendSequence);
 194         memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 195
 196         conn->sendSequence++;
 197         conn->canSend = false;
 198
 199         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 200                 return -1;
 201
 202         conn->lastSendTime = realtime;
 203         packetsSent++;
 204         reliableMessagesSent++;
 205         return 1;
 206 }
 207
 208 static void NetConn_SendMessageNext(netconn_t *conn)
 209 {
 210         unsigned int packetLen;
 211         unsigned int dataLen;
 212         unsigned int eom;
 213         unsigned int *header;
 214
 215         if (conn->sendMessageLength && !conn->canSend && conn->sendNext)
 216         {
 217                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 218                 {
 219                         dataLen = conn->sendMessageLength;
 220                         eom = NETFLAG_EOM;
 221                 }
 222                 else
 223                 {
 224                         dataLen = MAX_PACKETFRAGMENT;
 225                         eom = 0;
 226                 }
 227
 228                 packetLen = NET_HEADERSIZE + dataLen;
 229
 230                 header = (void *)sendbuffer;
 231                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 232                 header[1] = BigLong(conn->sendSequence);
 233                 memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 234
 235                 conn->sendSequence++;
 236                 conn->sendNext = false;
 237
 238                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 239                         return;
 240
 241                 conn->lastSendTime = realtime;
 242                 packetsSent++;
 243         }
 244 }
 245
 246 static void NetConn_ReSendMessage(netconn_t *conn)
 247 {
 248         unsigned int packetLen;
 249         unsigned int dataLen;
 250         unsigned int eom;
 251         unsigned int *header;
 252
 253         if (conn->sendMessageLength && !conn->canSend && (realtime - conn->lastSendTime) > 1.0)
 254         {
 255                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 256                 {
 257                         dataLen = conn->sendMessageLength;
 258                         eom = NETFLAG_EOM;
 259                 }
 260                 else
 261                 {
 262                         dataLen = MAX_PACKETFRAGMENT;
 263                         eom = 0;
 264                 }
 265
 266                 packetLen = NET_HEADERSIZE + dataLen;
 267
 268                 header = (void *)sendbuffer;
 269                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 270                 header[1] = BigLong(conn->sendSequence - 1);
 271                 memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 272
 273                 conn->sendNext = false;
 274
 275                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 276                         return;
 277
 278                 conn->lastSendTime = realtime;
 279                 packetsReSent++;
 280         }
 281 }
 282
 283 qboolean NetConn_CanSendMessage(netconn_t *conn)
 284 {
 285         return conn->canSend;
 286 }
 287
 288 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data)
 289 {
 290         int packetLen;
 291         int *header;
 292
 293 #ifdef DEBUG
 294         if (data->cursize == 0)
 295                 Sys_Error("Datagram_SendUnreliableMessage: zero length message\n");
 296
 297         if (data->cursize > MAX_DATAGRAM)
 298                 Sys_Error("Datagram_SendUnreliableMessage: message too big %u\n", data->cursize);
 299 #endif
 300
 301         packetLen = NET_HEADERSIZE + data->cursize;
 302
 303         header = (void *)sendbuffer;
 304         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
 305         header[1] = BigLong(conn->unreliableSendSequence);
 306         memcpy(sendbuffer + 8, data->data, data->cursize);
 307
 308         conn->unreliableSendSequence++;
 309
 310         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 311                 return -1;
 312
 313         packetsSent++;
 314         unreliableMessagesSent++;
 315         return 1;
 316 }
 317
 318 void NetConn_CloseClientPorts(void)
 319 {
 320         for (;cl_numsockets > 0;cl_numsockets--)
 321                 if (cl_sockets[cl_numsockets - 1])
 322                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 323 }
 324
 325 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
 326 {
 327         lhnetaddress_t address;
 328         lhnetsocket_t *s;
 329         char addressstring2[1024];
 330         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 331         {
 332                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 333                 {
 334                         cl_sockets[cl_numsockets++] = s;
 335                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 336                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
 337                 }
 338                 else
 339                 {
 340                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 341                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 342                 }
 343         }
 344         else
 345                 Con_Printf("Client unable to parse address %s\n", addressstring);
 346 }
 347
 348 void NetConn_OpenClientPorts(void)
 349 {
 350         int port;
 351         NetConn_CloseClientPorts();
 352         port = bound(0, cl_netport.integer, 65535);
 353         if (cl_netport.integer != port)
 354                 Cvar_SetValueQuick(&cl_netport, port);
 355         Con_Printf("Client using port %i\n", port);
 356         NetConn_OpenClientPort("local", port);
 357         NetConn_OpenClientPort(cl_netaddress.string, port);
 358         NetConn_OpenClientPort(cl_netaddress_ipv6.string, port);
 359 }
 360
 361 void NetConn_CloseServerPorts(void)
 362 {
 363         for (;sv_numsockets > 0;sv_numsockets--)
 364                 if (sv_sockets[sv_numsockets - 1])
 365                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 366 }
 367
 368 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
 369 {
 370         lhnetaddress_t address;
 371         lhnetsocket_t *s;
 372         char addressstring2[1024];
 373         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 374         {
 375                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 376                 {
 377                         sv_sockets[sv_numsockets++] = s;
 378                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 379                         Con_Printf("Server listening on address %s\n", addressstring2);
 380                 }
 381                 else
 382                 {
 383                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 384                         Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 385                 }
 386         }
 387         else
 388                 Con_Printf("Server unable to parse address %s\n", addressstring);
 389 }
 390
 391 void NetConn_OpenServerPorts(int opennetports)
 392 {
 393         int port;
 394         NetConn_CloseServerPorts();
 395         port = bound(0, sv_netport.integer, 65535);
 396         if (port == 0)
 397                 port = 26000;
 398         Con_Printf("Server using port %i\n", port);
 399         if (sv_netport.integer != port)
 400                 Cvar_SetValueQuick(&sv_netport, port);
 401         if (cls.state != ca_dedicated)
 402                 NetConn_OpenServerPort("local", port);
 403         if (opennetports)
 404         {
 405                 NetConn_OpenServerPort(sv_netaddress.string, port);
 406                 NetConn_OpenServerPort(sv_netaddress_ipv6.string, port);
 407         }
 408         if (sv_numsockets == 0)
 409                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!\n");
 410 }
 411
 412 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
 413 {
 414         int i, a = LHNETADDRESS_GetAddressType(address);
 415         for (i = 0;i < cl_numsockets;i++)
 416                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
 417                         return cl_sockets[i];
 418         return NULL;
 419 }
 420
 421 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
 422 {
 423         int i, a = LHNETADDRESS_GetAddressType(address);
 424         for (i = 0;i < sv_numsockets;i++)
 425                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
 426                         return sv_sockets[i];
 427         return NULL;
 428 }
 429
 430 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 431 {
 432         netconn_t *conn;
 433         conn = Mem_Alloc(netconn_mempool, sizeof(*conn));
 434         conn->mysocket = mysocket;
 435         conn->peeraddress = *peeraddress;
 436         conn->canSend = true;
 437         conn->connecttime = realtime;
 438         conn->lastMessageTime = realtime;
 439         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
 440         // reduce effectiveness of connection request floods
 441         conn->timeout = realtime + net_connecttimeout.value;
 442         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
 443         conn->next = netconn_list;
 444         netconn_list = conn;
 445         return conn;
 446 }
 447
 448 void NetConn_Close(netconn_t *conn)
 449 {
 450         netconn_t *c;
 451         // remove connection from list
 452         if (conn == netconn_list)
 453                 netconn_list = conn->next;
 454         else
 455         {
 456                 for (c = netconn_list;c;c = c->next)
 457                 {
 458                         if (c->next == conn)
 459                         {
 460                                 c->next = conn->next;
 461                                 break;
 462                         }
 463                 }
 464                 // not found in list, we'll avoid crashing here...
 465                 if (!c)
 466                         return;
 467         }
 468         // free connection
 469         Mem_Free(conn);
 470 }
 471
 472 static int clientport = -1;
 473 static int clientport2 = -1;
 474 static int hostport = -1;
 475 static void NetConn_UpdateServerStuff(void)
 476 {
 477         if (cls.state != ca_dedicated)
 478         {
 479                 if (clientport2 != cl_netport.integer)
 480                 {
 481                         clientport2 = cl_netport.integer;
 482                         if (cls.state == ca_connected)
 483                                 Con_Printf("Changing \"cl_port\" will not take effect until you reconnect.\n");
 484                 }
 485                 if (cls.state == ca_disconnected && clientport != clientport2)
 486                 {
 487                         clientport = clientport2;
 488                         NetConn_CloseClientPorts();
 489                 }
 490                 if (cl_numsockets == 0)
 491                         NetConn_OpenClientPorts();
 492         }
 493
 494         if (hostport != sv_netport.integer)
 495         {
 496                 hostport = sv_netport.integer;
 497                 if (sv.active)
 498                         Con_Printf("Changing \"port\" will not take effect until \"map\" command is executed.\n");
 499         }
 500 }
 501
 502 int NetConn_ReceivedMessage(netconn_t *conn, qbyte *data, int length)
 503 {
 504         unsigned int count;
 505         unsigned int flags;
 506         unsigned int sequence;
 507
 508         if (length >= 8)
 509         {
 510                 length = BigLong(((int *)data)[0]);
 511                 flags = length & ~NETFLAG_LENGTH_MASK;
 512                 length &= NETFLAG_LENGTH_MASK;
 513                 // control packets were already handled
 514                 if (!(flags & NETFLAG_CTL))
 515                 {
 516                         sequence = BigLong(((int *)data)[1]);
 517                         packetsReceived++;
 518                         data += 8;
 519                         length -= 8;
 520                         if (flags & NETFLAG_UNRELIABLE)
 521                         {
 522                                 if (sequence >= conn->unreliableReceiveSequence)
 523                                 {
 524                                         if (sequence > conn->unreliableReceiveSequence)
 525                                         {
 526                                                 count = sequence - conn->unreliableReceiveSequence;
 527                                                 droppedDatagrams += count;
 528                                                 Con_DPrintf("Dropped %u datagram(s)\n", count);
 529                                         }
 530                                         conn->unreliableReceiveSequence = sequence + 1;
 531                                         conn->lastMessageTime = realtime;
 532                                         conn->timeout = realtime + net_messagetimeout.value;
 533                                         unreliableMessagesReceived++;
 534                                         if (length > 0)
 535                                         {
 536                                                 SZ_Clear(&net_message);
 537                                                 SZ_Write(&net_message, data, length);
 538                                                 MSG_BeginReading();
 539                                                 return 2;
 540                                         }
 541                                 }
 542                                 else
 543                                         Con_DPrintf("Got a stale datagram\n");
 544                                 return 1;
 545                         }
 546                         else if (flags & NETFLAG_ACK)
 547                         {
 548                                 if (sequence == (conn->sendSequence - 1))
 549                                 {
 550                                         if (sequence == conn->ackSequence)
 551                                         {
 552                                                 conn->ackSequence++;
 553                                                 if (conn->ackSequence != conn->sendSequence)
 554                                                         Con_DPrintf("ack sequencing error\n");
 555                                                 conn->lastMessageTime = realtime;
 556                                                 conn->timeout = realtime + net_messagetimeout.value;
 557                                                 conn->sendMessageLength -= MAX_PACKETFRAGMENT;
 558                                                 if (conn->sendMessageLength > 0)
 559                                                 {
 560                                                         memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
 561                                                         conn->sendNext = true;
 562                                                         NetConn_SendMessageNext(conn);
 563                                                 }
 564                                                 else
 565                                                 {
 566                                                         conn->sendMessageLength = 0;
 567                                                         conn->canSend = true;
 568                                                 }
 569                                         }
 570                                         else
 571                                                 Con_DPrintf("Duplicate ACK received\n");
 572                                 }
 573                                 else
 574                                         Con_DPrintf("Stale ACK received\n");
 575                                 return 1;
 576                         }
 577                         else if (flags & NETFLAG_DATA)
 578                         {
 579                                 unsigned int temppacket[2];
 580                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
 581                                 temppacket[1] = BigLong(sequence);
 582                                 NetConn_Write(conn->mysocket, (qbyte *)temppacket, 8, &conn->peeraddress);
 583                                 if (sequence == conn->receiveSequence)
 584                                 {
 585                                         conn->lastMessageTime = realtime;
 586                                         conn->timeout = realtime + net_messagetimeout.value;
 587                                         conn->receiveSequence++;
 588                                         memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
 589                                         conn->receiveMessageLength += length;
 590                                         if (flags & NETFLAG_EOM)
 591                                         {
 592                                                 reliableMessagesReceived++;
 593                                                 length = conn->receiveMessageLength;
 594                                                 conn->receiveMessageLength = 0;
 595                                                 if (length > 0)
 596                                                 {
 597                                                         SZ_Clear(&net_message);
 598                                                         SZ_Write(&net_message, conn->receiveMessage, length);
 599                                                         MSG_BeginReading();
 600                                                         return 2;
 601                                                 }
 602                                         }
 603                                 }
 604                                 else
 605                                         receivedDuplicateCount++;
 606                                 return 1;
 607                         }
 608                 }
 609         }
 610         return 0;
 611 }
 612
 613 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 614 {
 615         cls.netcon = NetConn_Open(mysocket, peeraddress);
 616         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
 617         key_dest = key_game;
 618         m_state = m_none;
 619         cls.connect_trying = false;
 620         cls.demonum = -1;                       // not in the demo loop now
 621         cls.state = ca_connected;
 622         cls.signon = 0;                         // need all the signon messages before playing
 623         CL_ClearState();
 624         Host_Reconnect_f();
 625 }
 626
 627 int NetConn_IsLocalGame(void)
 628 {
 629         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
 630                 return true;
 631         return false;
 632 }
 633
 634 static struct
 635 {
 636         double senttime;
 637         lhnetaddress_t peeraddress;
 638 }
 639 pingcache[HOSTCACHESIZE];
 640
 641 int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
 642 {
 643         int ret, c, control;
 644         lhnetaddress_t svaddress;
 645         const char *s;
 646         char *string, addressstring2[128], cname[128], ipstring[32];
 647         char stringbuf[16384];
 648
 649         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
 650         {
 651                 // received a command string - strip off the packaging and put it
 652                 // into our string buffer with NULL termination
 653                 data += 4;
 654                 length -= 4;
 655                 length = min(length, (int)sizeof(stringbuf) - 1);
 656                 memcpy(stringbuf, data, length);
 657                 stringbuf[length] = 0;
 658                 string = stringbuf;
 659
 660                 if (developer.integer)
 661                 {
 662                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 663                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
 664                         Com_HexDumpToConsole(data, length);
 665                 }
 666
 667                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
 668                 {
 669                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 670                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
 671                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\challenge\\%s", string + 10), peeraddress);
 672                         return true;
 673                 }
 674                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
 675                 {
 676                         NetConn_ConnectionEstablished(mysocket, peeraddress);
 677                         return true;
 678                 }
 679                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
 680                 {
 681                         cls.connect_trying = false;
 682                         string += 7;
 683                         length = max(length - 7, (int)sizeof(m_return_reason) - 1);
 684                         memcpy(m_return_reason, string, length);
 685                         m_return_reason[length] = 0;
 686                         Con_Printf("%s\n", m_return_reason);
 687                         return true;
 688                 }
 689                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
 690                 {
 691                         int i, j, c, n, users, maxusers;
 692                         char game[32], mod[32], map[32], name[128];
 693                         double pingtime;
 694                         hostcache_t temp;
 695                         string += 13;
 696                         // hostcache only uses text addresses
 697                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
 698                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(game, s, sizeof (game));else game[0] = 0;
 699                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(mod , s, sizeof (mod ));else mod[0]  = 0;
 700                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(map , s, sizeof (map ));else map[0]  = 0;
 701                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(name, s, sizeof (name));else name[0] = 0;
 702                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) c = atoi(s);else c = -1;
 703                         if ((s = SearchInfostring(string, "clients"      )) != NULL) users = atoi(s);else users = 0;
 704                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) maxusers = atoi(s);else maxusers = 0;
 705                         // search the cache for this server and update it
 706                         for (n = 0; n < hostCacheCount; n++)
 707                         {
 708                                 if (!strcmp(cname, hostcache[n].cname))
 709                                 {
 710                                         if (hostcache[n].ping == 100000)
 711                                                 serverreplycount++;
 712                                         pingtime = (int)((realtime - hostcache[n].querytime) * 1000.0);
 713                                         pingtime = bound(0, pingtime, 9999);
 714                                         // update the ping
 715                                         hostcache[n].ping = pingtime;
 716                                         // build description strings for the things users care about
 717                                         snprintf(hostcache[n].line1, sizeof(hostcache[n].line1), "%5d%c%3u/%3u %-65.65s", (int)pingtime, c != NET_PROTOCOL_VERSION ? '*' : ' ', users, maxusers, name);
 718                                         snprintf(hostcache[n].line2, sizeof(hostcache[n].line2), "%-21.21s %-19.19s %-17.17s %-20.20s", cname, game, mod, map);
 719                                         // if ping is especially high, display it as such
 720                                         if (pingtime >= 300)
 721                                         {
 722                                                 // orange numbers (lower block)
 723                                                 for (i = 0;i < 5;i++)
 724                                                         if (hostcache[n].line1[i] != ' ')
 725                                                                 hostcache[n].line1[i] += 128;
 726                                         }
 727                                         else if (pingtime >= 200)
 728                                         {
 729                                                 // yellow numbers (in upper block)
 730                                                 for (i = 0;i < 5;i++)
 731                                                         if (hostcache[n].line1[i] != ' ')
 732                                                                 hostcache[n].line1[i] -= 30;
 733                                         }
 734                                         // if not in the slist menu we should print the server to console
 735                                         if (m_state != m_slist)
 736                                                 Con_Printf("%s\n%s\n", hostcache[n].line1, hostcache[n].line2);
 737                                         // and finally, re-sort the list
 738                                         for (i = 0;i < hostCacheCount;i++)
 739                                         {
 740                                                 for (j = i + 1;j < hostCacheCount;j++)
 741                                                 {
 742                                                         //if (strcmp(hostcache[j].name, hostcache[i].name) < 0)
 743                                                         if (hostcache[i].ping > hostcache[j].ping)
 744                                                         {
 745                                                                 memcpy(&temp, &hostcache[j], sizeof(hostcache_t));
 746                                                                 memcpy(&hostcache[j], &hostcache[i], sizeof(hostcache_t));
 747                                                                 memcpy(&hostcache[i], &temp, sizeof(hostcache_t));
 748                                                         }
 749                                                 }
 750                                         }
 751                                         break;
 752                                 }
 753                         }
 754                         return true;
 755                 }
 756                 if (!strncmp(string, "getserversResponse\\", 19) && hostCacheCount < HOSTCACHESIZE)
 757                 {
 758                         int i, n, j;
 759                         hostcache_t temp;
 760                         // Extract the IP addresses
 761                         data += 18;
 762                         length -= 18;
 763                         masterreplycount++;
 764                         if (m_state != m_slist)
 765                                 Con_Printf("received server list...\n");
 766                         while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
 767                         {
 768                                 snprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], (data[5] << 8) | data[6]);
 769                                 if (developer.integer)
 770                                         Con_Printf("Requesting info from server %s\n", ipstring);
 771                                 LHNETADDRESS_FromString(&svaddress, ipstring, 0);
 772                                 NetConn_WriteString(mysocket, "\377\377\377\377getinfo", &svaddress);
 773
 774
 775                                 // add to slist (hostCache)
 776                                 // search the cache for this server
 777                                 for (n = 0; n < hostCacheCount; n++)
 778                                         if (!strcmp(ipstring, hostcache[n].cname))
 779                                                 break;
 780                                 // add it or update it
 781                                 if (n == hostCacheCount)
 782                                 {
 783                                         // if cache is full replace highest ping server (the list is
 784                                         // kept sorted so this is always the last, and if this server
 785                                         // is good it will be sorted into an early part of the list)
 786                                         if (hostCacheCount >= HOSTCACHESIZE)
 787                                                 n = hostCacheCount - 1;
 788                                         else
 789                                         {
 790                                                 serverquerycount++;
 791                                                 hostCacheCount++;
 792                                         }
 793                                 }
 794                                 memset(&hostcache[n], 0, sizeof(hostcache[n]));
 795                                 // store the data the engine cares about (address and ping)
 796                                 strlcpy (hostcache[n].cname, ipstring, sizeof (hostcache[n].cname));
 797                                 hostcache[n].ping = 100000;
 798                                 hostcache[n].querytime = realtime;
 799                                 // build description strings for the things users care about
 800                                 snprintf(hostcache[n].line1, sizeof(hostcache[n].line1), "?");
 801                                 snprintf(hostcache[n].line2, sizeof(hostcache[n].line2), "%s", ipstring);
 802                                 // if not in the slist menu we should print the server to console
 803                                 if (m_state != m_slist)
 804                                         Con_Printf("querying %s\n", ipstring);
 805                                 // and finally, re-sort the list
 806                                 for (i = 0;i < hostCacheCount;i++)
 807                                 {
 808                                         for (j = i + 1;j < hostCacheCount;j++)
 809                                         {
 810                                                 //if (strcmp(hostcache[j].name, hostcache[i].name) < 0)
 811                                                 if (hostcache[i].ping > hostcache[j].ping)
 812                                                 {
 813                                                         memcpy(&temp, &hostcache[j], sizeof(hostcache_t));
 814                                                         memcpy(&hostcache[j], &hostcache[i], sizeof(hostcache_t));
 815                                                         memcpy(&hostcache[i], &temp, sizeof(hostcache_t));
 816                                                 }
 817                                         }
 818                                 }
 819
 820
 821                                 // move on to next address in packet
 822                                 data += 7;
 823                                 length -= 7;
 824                         }
 825                         return true;
 826                 }
 827                 /*
 828                 if (!strncmp(string, "ping", 4))
 829                 {
 830                         if (developer.integer)
 831                                 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
 832                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
 833                         return true;
 834                 }
 835                 if (!strncmp(string, "ack", 3))
 836                         return true;
 837                 */
 838                 // we may not have liked the packet, but it was a command packet, so
 839                 // we're done processing this packet now
 840                 return true;
 841         }
 842         // netquake control packets, supported for compatibility only
 843         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
 844         {
 845                 c = data[4];
 846                 data += 5;
 847                 length -= 5;
 848                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 849                 switch (c)
 850                 {
 851                 case CCREP_ACCEPT:
 852                         if (developer.integer)
 853                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
 854                         if (cls.connect_trying)
 855                         {
 856                                 lhnetaddress_t clientportaddress;
 857                                 clientportaddress = *peeraddress;
 858                                 if (length >= 4)
 859                                 {
 860                                         unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
 861                                         data += 4;
 862                                         length -= 4;
 863                                         LHNETADDRESS_SetPort(&clientportaddress, port);
 864                                 }
 865                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress);
 866                         }
 867                         break;
 868                 case CCREP_REJECT:
 869                         if (developer.integer)
 870                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
 871                         Con_Printf("%s\n", data);
 872                         strlcpy (m_return_reason, data, sizeof (m_return_reason));
 873                         break;
 874 #if 0
 875                 case CCREP_SERVER_INFO:
 876                         if (developer.integer)
 877                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
 878                         if (cls.state != ca_dedicated)
 879                         {
 880                                 // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address
 881                                 // string we just ignore it and keep the real address
 882                                 MSG_ReadString();
 883                                 // hostcache only uses text addresses
 884                                 cname = UDP_AddrToString(readaddr);
 885                                 // search the cache for this server
 886                                 for (n = 0; n < hostCacheCount; n++)
 887                                         if (!strcmp(cname, hostcache[n].cname))
 888                                                 break;
 889                                 // add it
 890                                 if (n == hostCacheCount && hostCacheCount < HOSTCACHESIZE)
 891                                 {
 892                                         hostCacheCount++;
 893                                         memset(&hostcache[n], 0, sizeof(hostcache[n]));
 894                                         strlcpy (hostcache[n].name, MSG_ReadString(), sizeof (hostcache[n].name));
 895                                         strlcpy (hostcache[n].map, MSG_ReadString(), sizeof (hostcache[n].map));
 896                                         hostcache[n].users = MSG_ReadByte();
 897                                         hostcache[n].maxusers = MSG_ReadByte();
 898                                         c = MSG_ReadByte();
 899                                         if (c != NET_PROTOCOL_VERSION)
 900                                         {
 901                                                 strlcpy (hostcache[n].cname, hostcache[n].name, sizeof (hostcache[n].cname));
 902                                                 strcpy(hostcache[n].name, "*");
 903                                                 strlcat (hostcache[n].name, hostcache[n].cname, sizeof(hostcache[n].name));
 904                                         }
 905                                         strlcpy (hostcache[n].cname, cname, sizeof (hostcache[n].cname));
 906                                 }
 907                         }
 908                         break;
 909                 case CCREP_PLAYER_INFO:
 910                         // we got a CCREP_PLAYER_INFO??
 911                         //if (developer.integer)
 912                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
 913                         break;
 914                 case CCREP_RULE_INFO:
 915                         // we got a CCREP_RULE_INFO??
 916                         //if (developer.integer)
 917                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
 918                         break;
 919 #endif
 920                 default:
 921                         break;
 922                 }
 923                 // we may not have liked the packet, but it was a valid control
 924                 // packet, so we're done processing this packet now
 925                 return true;
 926         }
 927         ret = 0;
 928         if (length >= (int)NET_HEADERSIZE && cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress) && (ret = NetConn_ReceivedMessage(cls.netcon, data, length)) == 2)
 929                 CL_ParseServerMessage();
 930         return ret;
 931 }
 932
 933 void NetConn_ClientFrame(void)
 934 {
 935         int i, length;
 936         lhnetaddress_t peeraddress;
 937         netconn_t *conn;
 938         NetConn_UpdateServerStuff();
 939         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
 940         {
 941                 if (cls.connect_remainingtries == 0)
 942                 {
 943                         cls.connect_trying = false;
 944                         if (m_state == m_slist)
 945                                 strcpy (m_return_reason, "Connect: Failed");
 946                         else
 947                                 Con_Printf("Connect failed\n");
 948                         return;
 949                 }
 950                 if (cls.connect_nextsendtime)
 951                 {
 952                         if (m_state == m_slist)
 953                                 strcpy (m_return_reason, "Connect: Still trying");
 954                         else
 955                                 Con_Printf("Still trying...\n");
 956                 }
 957                 else
 958                 {
 959                         if (m_state == m_slist)
 960                                 strcpy (m_return_reason, "Connect: Trying");
 961                         else
 962                                 Con_Printf("Trying...\n");
 963                 }
 964                 cls.connect_nextsendtime = realtime + 1;
 965                 cls.connect_remainingtries--;
 966                 // try challenge first (newer server)
 967                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
 968                 // then try netquake as a fallback (old server, or netquake)
 969                 SZ_Clear(&net_message);
 970                 // save space for the header, filled in later
 971                 MSG_WriteLong(&net_message, 0);
 972                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
 973                 MSG_WriteString(&net_message, "QUAKE");
 974                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
 975                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 976                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
 977                 SZ_Clear(&net_message);
 978         }
 979         for (i = 0;i < cl_numsockets;i++)
 980                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
 981                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
 982         if (cls.netcon && realtime > cls.netcon->timeout)
 983         {
 984                 Con_Printf("Connection timed out\n");
 985                 CL_Disconnect();
 986         }
 987         for (conn = netconn_list;conn;conn = conn->next)
 988                 NetConn_ReSendMessage(conn);
 989 }
 990
 991 #define MAX_CHALLENGES 128
 992 struct
 993 {
 994         lhnetaddress_t address;
 995         double time;
 996         char string[12];
 997 }
 998 challenge[MAX_CHALLENGES];
 999
1000 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
1001 {
1002         int i;
1003         char c;
1004         for (i = 0;i < bufferlength - 1;i++)
1005         {
1006                 do
1007                 {
1008                         c = rand () % (127 - 33) + 33;
1009                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
1010                 buffer[i] = c;
1011         }
1012         buffer[i] = 0;
1013 }
1014
1015 extern void SV_ConnectClient(int clientnum, netconn_t *netconnection);
1016 int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
1017 {
1018         int i, n, ret, clientnum, responselength, best;
1019         double besttime;
1020         client_t *client;
1021         netconn_t *conn;
1022         char *s, *string, response[512], addressstring2[128], stringbuf[16384];
1023
1024         if (sv.active)
1025         {
1026                 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1027                 {
1028                         // received a command string - strip off the packaging and put it
1029                         // into our string buffer with NULL termination
1030                         data += 4;
1031                         length -= 4;
1032                         length = min(length, (int)sizeof(stringbuf) - 1);
1033                         memcpy(stringbuf, data, length);
1034                         stringbuf[length] = 0;
1035                         string = stringbuf;
1036
1037                         if (developer.integer)
1038                         {
1039                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1040                                 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1041                                 Com_HexDumpToConsole(data, length);
1042                         }
1043
1044                         if (length >= 12 && !memcmp(string, "getchallenge", 12))
1045                         {
1046                                 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1047                                 {
1048                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1049                                                 break;
1050                                         if (besttime > challenge[i].time)
1051                                                 besttime = challenge[best = i].time;
1052                                 }
1053                                 // if we did not find an exact match, choose the oldest and
1054                                 // update address and string
1055                                 if (i == MAX_CHALLENGES)
1056                                 {
1057                                         i = best;
1058                                         challenge[i].address = *peeraddress;
1059                                         NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1060                                 }
1061                                 challenge[i].time = realtime;
1062                                 // send the challenge
1063                                 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1064                                 return true;
1065                         }
1066                         if (length > 8 && !memcmp(string, "connect\\", 8))
1067                         {
1068                                 string += 7;
1069                                 length -= 7;
1070                                 if ((s = SearchInfostring(string, "challenge")))
1071                                 {
1072                                         // validate the challenge
1073                                         for (i = 0;i < MAX_CHALLENGES;i++)
1074                                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1075                                                         break;
1076                                         if (i < MAX_CHALLENGES)
1077                                         {
1078                                                 // check engine protocol
1079                                                 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1080                                                 {
1081                                                         if (developer.integer)
1082                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1083                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1084                                                 }
1085                                                 else
1086                                                 {
1087                                                         // see if this is a duplicate connection request
1088                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1089                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1090                                                                         break;
1091                                                         if (clientnum < svs.maxclients)
1092                                                         {
1093                                                                 // duplicate connection request
1094                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1095                                                                 {
1096                                                                         // client is still trying to connect,
1097                                                                         // so we send a duplicate reply
1098                                                                         if (developer.integer)
1099                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1100                                                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1101                                                                 }
1102                                                                 // only kick if old connection seems dead
1103                                                                 if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1104                                                                 {
1105                                                                         // kick off connection and await retry
1106                                                                         client->deadsocket = true;
1107                                                                 }
1108                                                         }
1109                                                         else
1110                                                         {
1111                                                                 // this is a new client, find a slot
1112                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1113                                                                         if (!client->active)
1114                                                                                 break;
1115                                                                 if (clientnum < svs.maxclients)
1116                                                                 {
1117                                                                         // prepare the client struct
1118                                                                         if ((client->entitydatabase4 = EntityFrame4_AllocDatabase(sv_clients_mempool)))
1119                                                                         {
1120                                                                                 if ((conn = NetConn_Open(mysocket, peeraddress)))
1121                                                                                 {
1122                                                                                         // allocated connection
1123                                                                                         LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true);
1124                                                                                         if (developer.integer)
1125                                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1126                                                                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1127                                                                                         // now set up the client
1128                                                                                         SV_ConnectClient(clientnum, conn);
1129                                                                                         NetConn_Heartbeat(1);
1130                                                                                 }
1131                                                                                 else
1132                                                                                         EntityFrame4_FreeDatabase(client->entitydatabase4);
1133                                                                         }
1134                                                                 }
1135                                                                 else
1136                                                                 {
1137                                                                         // server is full
1138                                                                         if (developer.integer)
1139                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1140                                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1141                                                                 }
1142                                                         }
1143                                                 }
1144                                         }
1145                                 }
1146                                 return true;
1147                         }
1148                         if (length >= 7 && !memcmp(string, "getinfo", 7))
1149                         {
1150                                 const char *challenge = NULL;
1151                                 // If there was a challenge in the getinfo message
1152                                 if (length > 8 && string[7] == ' ')
1153                                         challenge = string + 8;
1154                                 for (i = 0, n = 0;i < svs.maxclients;i++)
1155                                         if (svs.clients[i].active)
1156                                                 n++;
1157                                 responselength = snprintf(response, sizeof(response), "\377\377\377\377infoResponse\x0A"
1158                                                         "\\gamename\\%s\\modname\\%s\\sv_maxclients\\%d"
1159                                                         "\\clients\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d%s%s",
1160                                                         gamename, com_modname, svs.maxclients, n,
1161                                                         sv.name, hostname.string, NET_PROTOCOL_VERSION, challenge ? "\\challenge\\" : "", challenge ? challenge : "");
1162                                 // does it fit in the buffer?
1163                                 if (responselength < (int)sizeof(response))
1164                                 {
1165                                         if (developer.integer)
1166                                                 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1167                                         NetConn_WriteString(mysocket, response, peeraddress);
1168                                 }
1169                                 return true;
1170                         }
1171                         /*
1172                         if (!strncmp(string, "ping", 4))
1173                         {
1174                                 if (developer.integer)
1175                                         Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1176                                 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1177                                 return true;
1178                         }
1179                         if (!strncmp(string, "ack", 3))
1180                                 return true;
1181                         */
1182                         // we may not have liked the packet, but it was a command packet, so
1183                         // we're done processing this packet now
1184                         return true;
1185                 }
1186                 // LordHavoc: disabled netquake control packet support in server
1187 #if 0
1188                 {
1189                         int c, control;
1190                         // netquake control packets, supported for compatibility only
1191                         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1192                         {
1193                                 c = data[4];
1194                                 data += 5;
1195                                 length -= 5;
1196                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1197                                 switch (c)
1198                                 {
1199                                 case CCREQ_CONNECT:
1200                                         //if (developer.integer)
1201                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
1202                                         if (length >= (int)strlen("QUAKE") + 1 + 1)
1203                                         {
1204                                                 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
1205                                                 {
1206                                                         if (developer.integer)
1207                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
1208                                                         SZ_Clear(&net_message);
1209                                                         // save space for the header, filled in later
1210                                                         MSG_WriteLong(&net_message, 0);
1211                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1212                                                         MSG_WriteString(&net_message, "Incompatible version.\n");
1213                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1214                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1215                                                         SZ_Clear(&net_message);
1216                                                 }
1217                                                 else
1218                                                 {
1219                                                         // see if this is a duplicate connection request
1220                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1221                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1222                                                                         break;
1223                                                         if (clientnum < svs.maxclients)
1224                                                         {
1225                                                                 // duplicate connection request
1226                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1227                                                                 {
1228                                                                         // client is still trying to connect,
1229                                                                         // so we send a duplicate reply
1230                                                                         if (developer.integer)
1231                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
1232                                                                         SZ_Clear(&net_message);
1233                                                                         // save space for the header, filled in later
1234                                                                         MSG_WriteLong(&net_message, 0);
1235                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1236                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
1237                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1238                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1239                                                                         SZ_Clear(&net_message);
1240                                                                 }
1241                                                                 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1242                                                                 {
1243                                                                         // the old client hasn't sent us anything
1244                                                                         // in quite a while, so kick off and let
1245                                                                         // the retry take care of it...
1246                                                                         client->deadsocket = true;
1247                                                                 }
1248                                                         }
1249                                                         else
1250                                                         {
1251                                                                 // this is a new client, find a slot
1252                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1253                                                                         if (!client->active)
1254                                                                                 break;
1255                                                                 if (clientnum < svs.maxclients && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
1256                                                                 {
1257                                                                         // connect to the client
1258                                                                         // everything is allocated, just fill in the details
1259                                                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
1260                                                                         if (developer.integer)
1261                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
1262                                                                         // send back the info about the server connection
1263                                                                         SZ_Clear(&net_message);
1264                                                                         // save space for the header, filled in later
1265                                                                         MSG_WriteLong(&net_message, 0);
1266                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1267                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
1268                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1269                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1270                                                                         SZ_Clear(&net_message);
1271                                                                         // now set up the client struct
1272                                                                         SV_ConnectClient(clientnum, conn);
1273                                                                         NetConn_Heartbeat(1);
1274                                                                 }
1275                                                                 else
1276                                                                 {
1277                                                                         //if (developer.integer)
1278                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
1279                                                                         // no room; try to let player know
1280                                                                         SZ_Clear(&net_message);
1281                                                                         // save space for the header, filled in later
1282                                                                         MSG_WriteLong(&net_message, 0);
1283                                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1284                                                                         MSG_WriteString(&net_message, "Server is full.\n");
1285                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1286                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1287                                                                         SZ_Clear(&net_message);
1288                                                                 }
1289                                                         }
1290                                                 }
1291                                         }
1292                                         break;
1293 #if 0
1294                                 case CCREQ_SERVER_INFO:
1295                                         if (developer.integer)
1296                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
1297                                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
1298                                         {
1299                                                 if (developer.integer)
1300                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
1301                                                 SZ_Clear(&net_message);
1302                                                 // save space for the header, filled in later
1303                                                 MSG_WriteLong(&net_message, 0);
1304                                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
1305                                                 UDP_GetSocketAddr(UDP_acceptSock, &newaddr);
1306                                                 MSG_WriteString(&net_message, UDP_AddrToString(&newaddr));
1307                                                 MSG_WriteString(&net_message, hostname.string);
1308                                                 MSG_WriteString(&net_message, sv.name);
1309                                                 MSG_WriteByte(&net_message, net_activeconnections);
1310                                                 MSG_WriteByte(&net_message, svs.maxclients);
1311                                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1312                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1313                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1314                                                 SZ_Clear(&net_message);
1315                                         }
1316                                         break;
1317                                 case CCREQ_PLAYER_INFO:
1318                                         if (developer.integer)
1319                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
1320                                         if (sv.active)
1321                                         {
1322                                                 int playerNumber, activeNumber, clientNumber;
1323                                                 client_t *client;
1324
1325                                                 playerNumber = MSG_ReadByte();
1326                                                 activeNumber = -1;
1327                                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
1328                                                         if (client->active && ++activeNumber == playerNumber)
1329                                                                 break;
1330                                                 if (clientNumber != svs.maxclients)
1331                                                 {
1332                                                         SZ_Clear(&net_message);
1333                                                         // save space for the header, filled in later
1334                                                         MSG_WriteLong(&net_message, 0);
1335                                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
1336                                                         MSG_WriteByte(&net_message, playerNumber);
1337                                                         MSG_WriteString(&net_message, client->name);
1338                                                         MSG_WriteLong(&net_message, client->colors);
1339                                                         MSG_WriteLong(&net_message, (int)client->edict->v->frags);
1340                                                         MSG_WriteLong(&net_message, (int)(realtime - client->netconnection->connecttime));
1341                                                         MSG_WriteString(&net_message, client->netconnection->address);
1342                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1343                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1344                                                         SZ_Clear(&net_message);
1345                                                 }
1346                                         }
1347                                         break;
1348                                 case CCREQ_RULE_INFO:
1349                                         if (developer.integer)
1350                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
1351                                         if (sv.active)
1352                                         {
1353                                                 char *prevCvarName;
1354                                                 cvar_t *var;
1355
1356                                                 // find the search start location
1357                                                 prevCvarName = MSG_ReadString();
1358                                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
1359
1360                                                 // send the response
1361                                                 SZ_Clear(&net_message);
1362                                                 // save space for the header, filled in later
1363                                                 MSG_WriteLong(&net_message, 0);
1364                                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
1365                                                 if (var)
1366                                                 {
1367                                                         MSG_WriteString(&net_message, var->name);
1368                                                         MSG_WriteString(&net_message, var->string);
1369                                                 }
1370                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1371                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1372                                                 SZ_Clear(&net_message);
1373                                         }
1374                                         break;
1375 #endif
1376                                 default:
1377                                         break;
1378                                 }
1379                                 // we may not have liked the packet, but it was a valid control
1380                                 // packet, so we're done processing this packet now
1381                                 return true;
1382                         }
1383                 }
1384 #endif
1385                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1386                 {
1387                         if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1388                         {
1389                                 sv_player = host_client->edict;
1390                                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length)) == 2)
1391                                         SV_ReadClientMessage();
1392                                 return ret;
1393                         }
1394                 }
1395         }
1396         return 0;
1397 }
1398
1399 void NetConn_ServerFrame(void)
1400 {
1401         int i, length;
1402         lhnetaddress_t peeraddress;
1403         netconn_t *conn;
1404         NetConn_UpdateServerStuff();
1405         for (i = 0;i < sv_numsockets;i++)
1406                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1407                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
1408         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1409         {
1410                 // never timeout loopback connections
1411                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(host_client->netconnection->mysocket)) != LHNETADDRESSTYPE_LOOP)
1412                 {
1413                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
1414                         sv_player = host_client->edict;
1415                         SV_DropClient(false);
1416                 }
1417         }
1418         for (conn = netconn_list;conn;conn = conn->next)
1419                 NetConn_ReSendMessage(conn);
1420 }
1421
1422 void NetConn_QueryMasters(void)
1423 {
1424         int i;
1425         int masternum;
1426         lhnetaddress_t masteraddress;
1427         char request[256];
1428
1429         if (hostCacheCount >= HOSTCACHESIZE)
1430                 return;
1431
1432         for (i = 0;i < cl_numsockets;i++)
1433         {
1434                 if (cl_sockets[i])
1435                 {
1436 #if 0
1437                         // search LAN
1438 #if 1
1439                         UDP_Broadcast(UDP_controlSock, "\377\377\377\377getinfo", 11);
1440 #else
1441                         SZ_Clear(&net_message);
1442                         // save space for the header, filled in later
1443                         MSG_WriteLong(&net_message, 0);
1444                         MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
1445                         MSG_WriteString(&net_message, "QUAKE");
1446                         MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1447                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1448                         UDP_Broadcast(UDP_controlSock, net_message.data, net_message.cursize);
1449                         SZ_Clear(&net_message);
1450 #endif
1451 #endif
1452
1453                         // build the getservers
1454                         snprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
1455
1456                         // search internet
1457                         for (masternum = 0;sv_masters[masternum].name;masternum++)
1458                         {
1459                                 if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
1460                                 {
1461                                         masterquerycount++;
1462                                         NetConn_WriteString(cl_sockets[i], request, &masteraddress);
1463                                 }
1464                         }
1465                 }
1466         }
1467         if (!masterquerycount)
1468         {
1469                 Con_Printf("Unable to query master servers, no suitable network sockets active.\n");
1470                 strcpy(m_return_reason, "No network");
1471         }
1472 }
1473
1474 void NetConn_Heartbeat(int priority)
1475 {
1476         lhnetaddress_t masteraddress;
1477         int masternum;
1478         lhnetsocket_t *mysocket;
1479
1480         // if it's a state change (client connected), limit next heartbeat to no
1481         // more than 30 sec in the future
1482         if (priority == 1 && nextheartbeattime > realtime + 30.0)
1483                 nextheartbeattime = realtime + 30.0;
1484
1485         // limit heartbeatperiod to 30 to 270 second range,
1486         // lower limit is to avoid abusing master servers with excess traffic,
1487         // upper limit is to avoid timing out on the master server (which uses
1488         // 300 sec timeout)
1489         if (sv_heartbeatperiod.value < 30)
1490                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
1491         if (sv_heartbeatperiod.value > 270)
1492                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
1493
1494         // make advertising optional and don't advertise singleplayer games, and
1495         // only send a heartbeat as often as the admin wants
1496         if (sv.active && sv_public.integer && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
1497         {
1498                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
1499                 for (masternum = 0;sv_masters[masternum].name;masternum++)
1500                         if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
1501                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
1502         }
1503 }
1504
1505 int NetConn_SendToAll(sizebuf_t *data, double blocktime)
1506 {
1507         int i, count = 0;
1508         qbyte sent[MAX_SCOREBOARD];
1509
1510         memset(sent, 0, sizeof(sent));
1511
1512         // simultaneously wait for the first CanSendMessage and send the message,
1513         // then wait for a second CanSendMessage (verifying it was received), or
1514         // the client drops and is no longer counted
1515         // the loop aborts when either it runs out of clients to send to, or a
1516         // timeout expires
1517         blocktime += Sys_DoubleTime();
1518         do
1519         {
1520                 count = 0;
1521                 NetConn_ClientFrame();
1522                 NetConn_ServerFrame();
1523                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1524                 {
1525                         if (host_client->netconnection)
1526                         {
1527                                 if (NetConn_CanSendMessage(host_client->netconnection))
1528                                 {
1529                                         if (!sent[i])
1530                                                 NetConn_SendReliableMessage(host_client->netconnection, data);
1531                                         sent[i] = true;
1532                                 }
1533                                 if (!NetConn_CanSendMessage(host_client->netconnection))
1534                                         count++;
1535                         }
1536                 }
1537         }
1538         while (count && Sys_DoubleTime() < blocktime);
1539         return count;
1540 }
1541
1542 static void Net_Heartbeat_f(void)
1543 {
1544         if (sv.active)
1545                 NetConn_Heartbeat(2);
1546         else
1547                 Con_Printf("No server running, can not heartbeat to master server.\n");
1548 }
1549
1550 void PrintStats(netconn_t *conn)
1551 {
1552         Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, conn->canSend, conn->sendSequence, conn->receiveSequence);
1553 }
1554
1555 void Net_Stats_f(void)
1556 {
1557         netconn_t *conn;
1558         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
1559         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
1560         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
1561         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
1562         Con_Printf("packetsSent                = %i\n", packetsSent);
1563         Con_Printf("packetsReSent              = %i\n", packetsReSent);
1564         Con_Printf("packetsReceived            = %i\n", packetsReceived);
1565         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
1566         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
1567         Con_Printf("connections                =\n");
1568         for (conn = netconn_list;conn;conn = conn->next)
1569                 PrintStats(conn);
1570 }
1571
1572 void Net_Slist_f(void)
1573 {
1574         masterquerytime = realtime;
1575         masterquerycount = 0;
1576         masterreplycount = 0;
1577         serverquerycount = 0;
1578         serverreplycount = 0;
1579         hostCacheCount = 0;
1580         memset(&pingcache, 0, sizeof(pingcache));
1581         if (m_state != m_slist)
1582                 Con_Printf("Sending requests to master servers\n");
1583         NetConn_QueryMasters();
1584         if (m_state != m_slist)
1585                 Con_Printf("Listening for replies...\n");
1586 }
1587
1588 void NetConn_Init(void)
1589 {
1590         int i;
1591         lhnetaddress_t tempaddress;
1592         netconn_mempool = Mem_AllocPool("Networking");
1593         Cmd_AddCommand("net_stats", Net_Stats_f);
1594         Cmd_AddCommand("net_slist", Net_Slist_f);
1595         Cmd_AddCommand("heartbeat", Net_Heartbeat_f);
1596         Cvar_RegisterVariable(&net_messagetimeout);
1597         Cvar_RegisterVariable(&net_messagerejointimeout);
1598         Cvar_RegisterVariable(&net_connecttimeout);
1599         Cvar_RegisterVariable(&cl_fakelocalping_min);
1600         Cvar_RegisterVariable(&cl_fakelocalping_max);
1601         Cvar_RegisterVariable(&cl_fakepacketloss_receive);
1602         Cvar_RegisterVariable(&cl_fakepacketloss_send);
1603         Cvar_RegisterVariable(&sv_fakepacketloss_receive);
1604         Cvar_RegisterVariable(&sv_fakepacketloss_send);
1605         Cvar_RegisterVariable(&hostname);
1606         Cvar_RegisterVariable(&developer_networking);
1607         Cvar_RegisterVariable(&cl_netport);
1608         Cvar_RegisterVariable(&cl_netaddress);
1609         Cvar_RegisterVariable(&cl_netaddress_ipv6);
1610         Cvar_RegisterVariable(&sv_netport);
1611         Cvar_RegisterVariable(&sv_netaddress);
1612         Cvar_RegisterVariable(&sv_netaddress_ipv6);
1613         Cvar_RegisterVariable(&sv_public);
1614         Cvar_RegisterVariable(&sv_heartbeatperiod);
1615         for (i = 0;sv_masters[i].name;i++)
1616                 Cvar_RegisterVariable(&sv_masters[i]);
1617         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
1618         {
1619                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
1620                 {
1621                         Con_Printf("-ip option used, setting cl_netaddress and sv_netaddress to address \"%s\"\n");
1622                         Cvar_SetQuick(&cl_netaddress, com_argv[i + 1]);
1623                         Cvar_SetQuick(&sv_netaddress, com_argv[i + 1]);
1624                 }
1625                 else
1626                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
1627         }
1628         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
1629         {
1630                 i = atoi(com_argv[i + 1]);
1631                 if (i >= 0 && i < 65536)
1632                 {
1633                         Con_Printf("-port option used, setting port cvar to %i\n", i);
1634                         Cvar_SetValueQuick(&sv_netport, i);
1635                 }
1636                 else
1637                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
1638         }
1639         cl_numsockets = 0;
1640         sv_numsockets = 0;
1641         memset(&pingcache, 0, sizeof(pingcache));
1642         SZ_Alloc(&net_message, NET_MAXMESSAGE, "net_message");
1643         LHNET_Init();
1644 }
1645
1646 void NetConn_Shutdown(void)
1647 {
1648         NetConn_CloseClientPorts();
1649         NetConn_CloseServerPorts();
1650         LHNET_Shutdown();
1651 }
1652