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", "69.59.212.88"},
  38         {0, "sv_masterextra2", "66.28.32.64"},
  39         {0, NULL, NULL}
  40 };
  41
  42 static double nextheartbeattime = 0;
  43
  44 sizebuf_t net_message;
  45
  46 cvar_t net_messagetimeout = {0, "net_messagetimeout","300"};
  47 cvar_t net_messagerejointimeout = {0, "net_messagerejointimeout","10"};
  48 cvar_t net_connecttimeout = {0, "net_connecttimeout","10"};
  49 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED"};
  50 cvar_t developer_networking = {0, "developer_networking", "0"};
  51
  52 cvar_t cl_fakelocalping_min = {0, "cl_fakelocalping_min","0"};
  53 cvar_t cl_fakelocalping_max = {0, "cl_fakelocalping_max","0"};
  54 static cvar_t cl_fakepacketloss_receive = {0, "cl_fakepacketloss_receive","0"};
  55 static cvar_t cl_fakepacketloss_send = {0, "cl_fakepacketloss_send","0"};
  56 static cvar_t sv_fakepacketloss_receive = {0, "sv_fakepacketloss_receive","0"};
  57 static cvar_t sv_fakepacketloss_send = {0, "sv_fakepacketloss_send","0"};
  58
  59
  60 /* statistic counters */
  61 static int packetsSent = 0;
  62 static int packetsReSent = 0;
  63 static int packetsReceived = 0;
  64 static int receivedDuplicateCount = 0;
  65 static int droppedDatagrams = 0;
  66
  67 static int unreliableMessagesSent = 0;
  68 static int unreliableMessagesReceived = 0;
  69 static int reliableMessagesSent = 0;
  70 static int reliableMessagesReceived = 0;
  71
  72 double masterquerytime = -1000;
  73 int masterquerycount = 0;
  74 int masterreplycount = 0;
  75 int serverquerycount = 0;
  76 int serverreplycount = 0;
  77
  78 int hostCacheCount = 0;
  79 hostcache_t hostcache[HOSTCACHESIZE];
  80
  81 static qbyte sendbuffer[NET_MAXMESSAGE];
  82 static qbyte readbuffer[NET_MAXMESSAGE];
  83
  84 int cl_numsockets;
  85 lhnetsocket_t *cl_sockets[16];
  86 int sv_numsockets;
  87 lhnetsocket_t *sv_sockets[16];
  88
  89 netconn_t *netconn_list = NULL;
  90 mempool_t *netconn_mempool = NULL;
  91
  92 cvar_t cl_netport = {0, "cl_port", "0"};
  93 cvar_t sv_netport = {0, "port", "26000"};
  94 cvar_t net_address = {0, "net_address", "0.0.0.0"};
  95 //cvar_t net_netaddress_ipv6 = {0, "net_address_ipv6", "[0:0:0:0:0:0:0:0]"};
  96
  97 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
  98 {
  99         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 100         int i;
 101         if (cl_fakepacketloss_receive.integer)
 102                 for (i = 0;i < cl_numsockets;i++)
 103                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_fakepacketloss_receive.integer)
 104                                 return 0;
 105         if (sv_fakepacketloss_receive.integer)
 106                 for (i = 0;i < cl_numsockets;i++)
 107                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_fakepacketloss_receive.integer)
 108                                 return 0;
 109         if (developer_networking.integer && length != 0)
 110         {
 111                 char addressstring[128], addressstring2[128];
 112                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 113                 if (length > 0)
 114                 {
 115                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 116                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
 117                         Com_HexDumpToConsole(data, length);
 118                 }
 119                 else
 120                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
 121         }
 122         return length;
 123 }
 124
 125 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 126 {
 127         int ret;
 128         int i;
 129         if (cl_fakepacketloss_send.integer)
 130                 for (i = 0;i < cl_numsockets;i++)
 131                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_fakepacketloss_send.integer)
 132                                 return length;
 133         if (sv_fakepacketloss_send.integer)
 134                 for (i = 0;i < cl_numsockets;i++)
 135                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_fakepacketloss_send.integer)
 136                                 return length;
 137         ret = LHNET_Write(mysocket, data, length, peeraddress);
 138         if (developer_networking.integer)
 139         {
 140                 char addressstring[128], addressstring2[128];
 141                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 142                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 143                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 144                 Com_HexDumpToConsole(data, length);
 145         }
 146         return ret;
 147 }
 148
 149 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 150 {
 151         // note this does not include the trailing NULL because we add that in the parser
 152         return NetConn_Write(mysocket, string, strlen(string), peeraddress);
 153 }
 154
 155 int NetConn_SendReliableMessage(netconn_t *conn, sizebuf_t *data)
 156 {
 157         unsigned int packetLen;
 158         unsigned int dataLen;
 159         unsigned int eom;
 160         unsigned int *header;
 161
 162 //#ifdef DEBUG
 163         if (data->cursize == 0)
 164                 Sys_Error("Datagram_SendMessage: zero length message\n");
 165
 166         if (data->cursize > NET_MAXMESSAGE)
 167                 Sys_Error("Datagram_SendMessage: message too big %u\n", data->cursize);
 168
 169         if (conn->canSend == false)
 170                 Sys_Error("SendMessage: called with canSend == false\n");
 171 //#endif
 172
 173         memcpy(conn->sendMessage, data->data, data->cursize);
 174         conn->sendMessageLength = data->cursize;
 175
 176         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 177         {
 178                 dataLen = conn->sendMessageLength;
 179                 eom = NETFLAG_EOM;
 180         }
 181         else
 182         {
 183                 dataLen = MAX_PACKETFRAGMENT;
 184                 eom = 0;
 185         }
 186
 187         packetLen = NET_HEADERSIZE + dataLen;
 188
 189         header = (void *)sendbuffer;
 190         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 191         header[1] = BigLong(conn->sendSequence);
 192         memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 193
 194         conn->sendSequence++;
 195         conn->canSend = false;
 196
 197         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 198                 return -1;
 199
 200         conn->lastSendTime = realtime;
 201         packetsSent++;
 202         reliableMessagesSent++;
 203         return 1;
 204 }
 205
 206 static void NetConn_SendMessageNext(netconn_t *conn)
 207 {
 208         unsigned int packetLen;
 209         unsigned int dataLen;
 210         unsigned int eom;
 211         unsigned int *header;
 212
 213         if (conn->sendMessageLength && !conn->canSend && conn->sendNext)
 214         {
 215                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 216                 {
 217                         dataLen = conn->sendMessageLength;
 218                         eom = NETFLAG_EOM;
 219                 }
 220                 else
 221                 {
 222                         dataLen = MAX_PACKETFRAGMENT;
 223                         eom = 0;
 224                 }
 225
 226                 packetLen = NET_HEADERSIZE + dataLen;
 227
 228                 header = (void *)sendbuffer;
 229                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 230                 header[1] = BigLong(conn->sendSequence);
 231                 memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 232
 233                 conn->sendSequence++;
 234                 conn->sendNext = false;
 235
 236                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 237                         return;
 238
 239                 conn->lastSendTime = realtime;
 240                 packetsSent++;
 241         }
 242 }
 243
 244 static void NetConn_ReSendMessage(netconn_t *conn)
 245 {
 246         unsigned int packetLen;
 247         unsigned int dataLen;
 248         unsigned int eom;
 249         unsigned int *header;
 250
 251         if (conn->sendMessageLength && !conn->canSend && (realtime - conn->lastSendTime) > 1.0)
 252         {
 253                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 254                 {
 255                         dataLen = conn->sendMessageLength;
 256                         eom = NETFLAG_EOM;
 257                 }
 258                 else
 259                 {
 260                         dataLen = MAX_PACKETFRAGMENT;
 261                         eom = 0;
 262                 }
 263
 264                 packetLen = NET_HEADERSIZE + dataLen;
 265
 266                 header = (void *)sendbuffer;
 267                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 268                 header[1] = BigLong(conn->sendSequence - 1);
 269                 memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 270
 271                 conn->sendNext = false;
 272
 273                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 274                         return;
 275
 276                 conn->lastSendTime = realtime;
 277                 packetsReSent++;
 278         }
 279 }
 280
 281 qboolean NetConn_CanSendMessage(netconn_t *conn)
 282 {
 283         return conn->canSend;
 284 }
 285
 286 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data)
 287 {
 288         int packetLen;
 289         int *header;
 290
 291 #ifdef DEBUG
 292         if (data->cursize == 0)
 293                 Sys_Error("Datagram_SendUnreliableMessage: zero length message\n");
 294
 295         if (data->cursize > MAX_DATAGRAM)
 296                 Sys_Error("Datagram_SendUnreliableMessage: message too big %u\n", data->cursize);
 297 #endif
 298
 299         packetLen = NET_HEADERSIZE + data->cursize;
 300
 301         header = (void *)sendbuffer;
 302         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
 303         header[1] = BigLong(conn->unreliableSendSequence);
 304         memcpy(sendbuffer + 8, data->data, data->cursize);
 305
 306         conn->unreliableSendSequence++;
 307
 308         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 309                 return -1;
 310
 311         packetsSent++;
 312         unreliableMessagesSent++;
 313         return 1;
 314 }
 315
 316 void NetConn_CloseClientPorts(void)
 317 {
 318         for (;cl_numsockets > 0;cl_numsockets--)
 319                 if (cl_sockets[cl_numsockets - 1])
 320                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 321 }
 322
 323 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
 324 {
 325         lhnetaddress_t address;
 326         lhnetsocket_t *s;
 327         char addressstring2[1024];
 328         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 329         {
 330                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 331                 {
 332                         cl_sockets[cl_numsockets++] = s;
 333                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 334                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
 335                 }
 336                 else
 337                 {
 338                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 339                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 340                 }
 341         }
 342         else
 343                 Con_Printf("Client unable to parse address %s\n", addressstring);
 344 }
 345
 346 void NetConn_OpenClientPorts(void)
 347 {
 348         int port;
 349         NetConn_CloseClientPorts();
 350         port = bound(0, cl_netport.integer, 65535);
 351         if (cl_netport.integer != port)
 352                 Cvar_SetValueQuick(&cl_netport, port);
 353         Con_Printf("Client using port %i\n", port);
 354         NetConn_OpenClientPort("local:2", 0);
 355         NetConn_OpenClientPort(net_address.string, port);
 356         //NetConn_OpenClientPort(net_address_ipv6.string, port);
 357 }
 358
 359 void NetConn_CloseServerPorts(void)
 360 {
 361         for (;sv_numsockets > 0;sv_numsockets--)
 362                 if (sv_sockets[sv_numsockets - 1])
 363                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 364 }
 365
 366 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
 367 {
 368         lhnetaddress_t address;
 369         lhnetsocket_t *s;
 370         char addressstring2[1024];
 371         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 372         {
 373                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 374                 {
 375                         sv_sockets[sv_numsockets++] = s;
 376                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 377                         Con_Printf("Server listening on address %s\n", addressstring2);
 378                 }
 379                 else
 380                 {
 381                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 382                         Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 383                 }
 384         }
 385         else
 386                 Con_Printf("Server unable to parse address %s\n", addressstring);
 387 }
 388
 389 void NetConn_OpenServerPorts(int opennetports)
 390 {
 391         int port;
 392         NetConn_CloseServerPorts();
 393         port = bound(0, sv_netport.integer, 65535);
 394         if (port == 0)
 395                 port = 26000;
 396         Con_Printf("Server using port %i\n", port);
 397         if (sv_netport.integer != port)
 398                 Cvar_SetValueQuick(&sv_netport, port);
 399         if (cls.state != ca_dedicated)
 400                 NetConn_OpenServerPort("local:1", 0);
 401         if (opennetports)
 402         {
 403                 NetConn_OpenServerPort(net_address.string, port);
 404                 //NetConn_OpenServerPort(net_address_ipv6.string, port);
 405         }
 406         if (sv_numsockets == 0)
 407                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!\n");
 408 }
 409
 410 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
 411 {
 412         int i, a = LHNETADDRESS_GetAddressType(address);
 413         for (i = 0;i < cl_numsockets;i++)
 414                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
 415                         return cl_sockets[i];
 416         return NULL;
 417 }
 418
 419 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
 420 {
 421         int i, a = LHNETADDRESS_GetAddressType(address);
 422         for (i = 0;i < sv_numsockets;i++)
 423                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
 424                         return sv_sockets[i];
 425         return NULL;
 426 }
 427
 428 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 429 {
 430         netconn_t *conn;
 431         conn = Mem_Alloc(netconn_mempool, sizeof(*conn));
 432         conn->mysocket = mysocket;
 433         conn->peeraddress = *peeraddress;
 434         conn->canSend = true;
 435         conn->connecttime = realtime;
 436         conn->lastMessageTime = realtime;
 437         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
 438         // reduce effectiveness of connection request floods
 439         conn->timeout = realtime + net_connecttimeout.value;
 440         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
 441         conn->next = netconn_list;
 442         netconn_list = conn;
 443         return conn;
 444 }
 445
 446 void NetConn_Close(netconn_t *conn)
 447 {
 448         netconn_t *c;
 449         // remove connection from list
 450         if (conn == netconn_list)
 451                 netconn_list = conn->next;
 452         else
 453         {
 454                 for (c = netconn_list;c;c = c->next)
 455                 {
 456                         if (c->next == conn)
 457                         {
 458                                 c->next = conn->next;
 459                                 break;
 460                         }
 461                 }
 462                 // not found in list, we'll avoid crashing here...
 463                 if (!c)
 464                         return;
 465         }
 466         // free connection
 467         Mem_Free(conn);
 468 }
 469
 470 static int clientport = -1;
 471 static int clientport2 = -1;
 472 static int hostport = -1;
 473 static void NetConn_UpdateServerStuff(void)
 474 {
 475         if (cls.state != ca_dedicated)
 476         {
 477                 if (clientport2 != cl_netport.integer)
 478                 {
 479                         clientport2 = cl_netport.integer;
 480                         if (cls.state == ca_connected)
 481                                 Con_Printf("Changing \"cl_port\" will not take effect until you reconnect.\n");
 482                 }
 483                 if (cls.state == ca_disconnected && clientport != clientport2)
 484                 {
 485                         clientport = clientport2;
 486                         NetConn_CloseClientPorts();
 487                 }
 488                 if (cl_numsockets == 0)
 489                         NetConn_OpenClientPorts();
 490         }
 491
 492         if (hostport != sv_netport.integer)
 493         {
 494                 hostport = sv_netport.integer;
 495                 if (sv.active)
 496                         Con_Printf("Changing \"port\" will not take effect until \"map\" command is executed.\n");
 497         }
 498 }
 499
 500 int NetConn_ReceivedMessage(netconn_t *conn, qbyte *data, int length)
 501 {
 502         unsigned int count;
 503         unsigned int flags;
 504         unsigned int sequence;
 505
 506         if (length >= 8)
 507         {
 508                 length = BigLong(((int *)data)[0]);
 509                 flags = length & ~NETFLAG_LENGTH_MASK;
 510                 length &= NETFLAG_LENGTH_MASK;
 511                 // control packets were already handled
 512                 if (!(flags & NETFLAG_CTL))
 513                 {
 514                         sequence = BigLong(((int *)data)[1]);
 515                         packetsReceived++;
 516                         data += 8;
 517                         length -= 8;
 518                         if (flags & NETFLAG_UNRELIABLE)
 519                         {
 520                                 if (sequence >= conn->unreliableReceiveSequence)
 521                                 {
 522                                         if (sequence > conn->unreliableReceiveSequence)
 523                                         {
 524                                                 count = sequence - conn->unreliableReceiveSequence;
 525                                                 droppedDatagrams += count;
 526                                                 Con_DPrintf("Dropped %u datagram(s)\n", count);
 527                                         }
 528                                         conn->unreliableReceiveSequence = sequence + 1;
 529                                         conn->lastMessageTime = realtime;
 530                                         conn->timeout = realtime + net_messagetimeout.value;
 531                                         unreliableMessagesReceived++;
 532                                         if (length > 0)
 533                                         {
 534                                                 SZ_Clear(&net_message);
 535                                                 SZ_Write(&net_message, data, length);
 536                                                 MSG_BeginReading();
 537                                                 return 2;
 538                                         }
 539                                 }
 540                                 else
 541                                         Con_DPrintf("Got a stale datagram\n");
 542                                 return 1;
 543                         }
 544                         else if (flags & NETFLAG_ACK)
 545                         {
 546                                 if (sequence == (conn->sendSequence - 1))
 547                                 {
 548                                         if (sequence == conn->ackSequence)
 549                                         {
 550                                                 conn->ackSequence++;
 551                                                 if (conn->ackSequence != conn->sendSequence)
 552                                                         Con_DPrintf("ack sequencing error\n");
 553                                                 conn->lastMessageTime = realtime;
 554                                                 conn->timeout = realtime + net_messagetimeout.value;
 555                                                 conn->sendMessageLength -= MAX_PACKETFRAGMENT;
 556                                                 if (conn->sendMessageLength > 0)
 557                                                 {
 558                                                         memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
 559                                                         conn->sendNext = true;
 560                                                         NetConn_SendMessageNext(conn);
 561                                                 }
 562                                                 else
 563                                                 {
 564                                                         conn->sendMessageLength = 0;
 565                                                         conn->canSend = true;
 566                                                 }
 567                                         }
 568                                         else
 569                                                 Con_DPrintf("Duplicate ACK received\n");
 570                                 }
 571                                 else
 572                                         Con_DPrintf("Stale ACK received\n");
 573                                 return 1;
 574                         }
 575                         else if (flags & NETFLAG_DATA)
 576                         {
 577                                 unsigned int temppacket[2];
 578                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
 579                                 temppacket[1] = BigLong(sequence);
 580                                 NetConn_Write(conn->mysocket, (qbyte *)temppacket, 8, &conn->peeraddress);
 581                                 if (sequence == conn->receiveSequence)
 582                                 {
 583                                         conn->lastMessageTime = realtime;
 584                                         conn->timeout = realtime + net_messagetimeout.value;
 585                                         conn->receiveSequence++;
 586                                         memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
 587                                         conn->receiveMessageLength += length;
 588                                         if (flags & NETFLAG_EOM)
 589                                         {
 590                                                 reliableMessagesReceived++;
 591                                                 length = conn->receiveMessageLength;
 592                                                 conn->receiveMessageLength = 0;
 593                                                 if (length > 0)
 594                                                 {
 595                                                         SZ_Clear(&net_message);
 596                                                         SZ_Write(&net_message, conn->receiveMessage, length);
 597                                                         MSG_BeginReading();
 598                                                         return 2;
 599                                                 }
 600                                         }
 601                                 }
 602                                 else
 603                                         receivedDuplicateCount++;
 604                                 return 1;
 605                         }
 606                 }
 607         }
 608         return 0;
 609 }
 610
 611 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 612 {
 613         cls.netcon = NetConn_Open(mysocket, peeraddress);
 614         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
 615         key_dest = key_game;
 616         m_state = m_none;
 617         cls.connect_trying = false;
 618         cls.demonum = -1;                       // not in the demo loop now
 619         cls.state = ca_connected;
 620         cls.signon = 0;                         // need all the signon messages before playing
 621         CL_ClearState();
 622         Host_Reconnect_f();
 623 }
 624
 625 int NetConn_IsLocalGame(void)
 626 {
 627         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
 628                 return true;
 629         return false;
 630 }
 631
 632 static struct
 633 {
 634         double senttime;
 635         lhnetaddress_t peeraddress;
 636 }
 637 pingcache[HOSTCACHESIZE];
 638
 639 int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
 640 {
 641         int ret, c, control;
 642         lhnetaddress_t svaddress;
 643         const char *s;
 644         char *string, addressstring2[128], cname[128], ipstring[32];
 645         char stringbuf[16384];
 646
 647         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
 648         {
 649                 // received a command string - strip off the packaging and put it
 650                 // into our string buffer with NULL termination
 651                 data += 4;
 652                 length -= 4;
 653                 length = min(length, (int)sizeof(stringbuf) - 1);
 654                 memcpy(stringbuf, data, length);
 655                 stringbuf[length] = 0;
 656                 string = stringbuf;
 657
 658                 if (developer.integer)
 659                 {
 660                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 661                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
 662                         Com_HexDumpToConsole(data, length);
 663                 }
 664
 665                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
 666                 {
 667                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 668                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
 669                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\challenge\\%s", string + 10), peeraddress);
 670                         return true;
 671                 }
 672                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
 673                 {
 674                         NetConn_ConnectionEstablished(mysocket, peeraddress);
 675                         return true;
 676                 }
 677                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
 678                 {
 679                         cls.connect_trying = false;
 680                         string += 7;
 681                         length = max(length - 7, (int)sizeof(m_return_reason) - 1);
 682                         memcpy(m_return_reason, string, length);
 683                         m_return_reason[length] = 0;
 684                         Con_Printf("%s\n", m_return_reason);
 685                         return true;
 686                 }
 687                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
 688                 {
 689                         int i, j, c, n, users, maxusers;
 690                         char game[32], mod[32], map[32], name[128];
 691                         double pingtime;
 692                         hostcache_t temp;
 693                         string += 13;
 694                         // hostcache only uses text addresses
 695                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
 696                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(game, s, sizeof (game));else game[0] = 0;
 697                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(mod , s, sizeof (mod ));else mod[0]  = 0;
 698                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(map , s, sizeof (map ));else map[0]  = 0;
 699                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(name, s, sizeof (name));else name[0] = 0;
 700                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) c = atoi(s);else c = -1;
 701                         if ((s = SearchInfostring(string, "clients"      )) != NULL) users = atoi(s);else users = 0;
 702                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) maxusers = atoi(s);else maxusers = 0;
 703                         // search the cache for this server and update it
 704                         for (n = 0; n < hostCacheCount; n++)
 705                         {
 706                                 if (!strcmp(cname, hostcache[n].cname))
 707                                 {
 708                                         if (hostcache[n].ping == 100000)
 709                                                 serverreplycount++;
 710                                         pingtime = (int)((realtime - hostcache[n].querytime) * 1000.0);
 711                                         pingtime = bound(0, pingtime, 9999);
 712                                         // update the ping
 713                                         hostcache[n].ping = pingtime;
 714                                         // build description strings for the things users care about
 715                                         snprintf(hostcache[n].line1, sizeof(hostcache[n].line1), "%5d%c%3u/%3u %-65.65s", (int)pingtime, c != NET_PROTOCOL_VERSION ? '*' : ' ', users, maxusers, name);
 716                                         snprintf(hostcache[n].line2, sizeof(hostcache[n].line2), "%-21.21s %-19.19s %-17.17s %-20.20s", cname, game, mod, map);
 717                                         // if ping is especially high, display it as such
 718                                         if (pingtime >= 300)
 719                                         {
 720                                                 // orange numbers (lower block)
 721                                                 for (i = 0;i < 5;i++)
 722                                                         if (hostcache[n].line1[i] != ' ')
 723                                                                 hostcache[n].line1[i] += 128;
 724                                         }
 725                                         else if (pingtime >= 200)
 726                                         {
 727                                                 // yellow numbers (in upper block)
 728                                                 for (i = 0;i < 5;i++)
 729                                                         if (hostcache[n].line1[i] != ' ')
 730                                                                 hostcache[n].line1[i] -= 30;
 731                                         }
 732                                         // if not in the slist menu we should print the server to console
 733                                         if (m_state != m_slist)
 734                                                 Con_Printf("%s\n%s\n", hostcache[n].line1, hostcache[n].line2);
 735                                         // and finally, re-sort the list
 736                                         for (i = 0;i < hostCacheCount;i++)
 737                                         {
 738                                                 for (j = i + 1;j < hostCacheCount;j++)
 739                                                 {
 740                                                         //if (strcmp(hostcache[j].name, hostcache[i].name) < 0)
 741                                                         if (hostcache[i].ping > hostcache[j].ping)
 742                                                         {
 743                                                                 memcpy(&temp, &hostcache[j], sizeof(hostcache_t));
 744                                                                 memcpy(&hostcache[j], &hostcache[i], sizeof(hostcache_t));
 745                                                                 memcpy(&hostcache[i], &temp, sizeof(hostcache_t));
 746                                                         }
 747                                                 }
 748                                         }
 749                                         break;
 750                                 }
 751                         }
 752                         return true;
 753                 }
 754                 if (!strncmp(string, "getserversResponse\\", 19) && hostCacheCount < HOSTCACHESIZE)
 755                 {
 756                         int i, n, j;
 757                         hostcache_t temp;
 758                         // Extract the IP addresses
 759                         data += 18;
 760                         length -= 18;
 761                         masterreplycount++;
 762                         if (m_state != m_slist)
 763                                 Con_Printf("received server list...\n");
 764                         while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
 765                         {
 766                                 snprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], (data[5] << 8) | data[6]);
 767                                 if (developer.integer)
 768                                         Con_Printf("Requesting info from server %s\n", ipstring);
 769                                 LHNETADDRESS_FromString(&svaddress, ipstring, 0);
 770                                 NetConn_WriteString(mysocket, "\377\377\377\377getinfo", &svaddress);
 771
 772
 773                                 // add to slist (hostCache)
 774                                 // search the cache for this server
 775                                 for (n = 0; n < hostCacheCount; n++)
 776                                         if (!strcmp(ipstring, hostcache[n].cname))
 777                                                 break;
 778                                 // add it or update it
 779                                 if (n == hostCacheCount)
 780                                 {
 781                                         // if cache is full replace highest ping server (the list is
 782                                         // kept sorted so this is always the last, and if this server
 783                                         // is good it will be sorted into an early part of the list)
 784                                         if (hostCacheCount >= HOSTCACHESIZE)
 785                                                 n = hostCacheCount - 1;
 786                                         else
 787                                         {
 788                                                 serverquerycount++;
 789                                                 hostCacheCount++;
 790                                         }
 791                                 }
 792                                 memset(&hostcache[n], 0, sizeof(hostcache[n]));
 793                                 // store the data the engine cares about (address and ping)
 794                                 strlcpy (hostcache[n].cname, ipstring, sizeof (hostcache[n].cname));
 795                                 hostcache[n].ping = 100000;
 796                                 hostcache[n].querytime = realtime;
 797                                 // build description strings for the things users care about
 798                                 snprintf(hostcache[n].line1, sizeof(hostcache[n].line1), "?");
 799                                 snprintf(hostcache[n].line2, sizeof(hostcache[n].line2), "%s", ipstring);
 800                                 // if not in the slist menu we should print the server to console
 801                                 if (m_state != m_slist)
 802                                         Con_Printf("querying %s\n", ipstring);
 803                                 // and finally, re-sort the list
 804                                 for (i = 0;i < hostCacheCount;i++)
 805                                 {
 806                                         for (j = i + 1;j < hostCacheCount;j++)
 807                                         {
 808                                                 //if (strcmp(hostcache[j].name, hostcache[i].name) < 0)
 809                                                 if (hostcache[i].ping > hostcache[j].ping)
 810                                                 {
 811                                                         memcpy(&temp, &hostcache[j], sizeof(hostcache_t));
 812                                                         memcpy(&hostcache[j], &hostcache[i], sizeof(hostcache_t));
 813                                                         memcpy(&hostcache[i], &temp, sizeof(hostcache_t));
 814                                                 }
 815                                         }
 816                                 }
 817
 818
 819                                 // move on to next address in packet
 820                                 data += 7;
 821                                 length -= 7;
 822                         }
 823                         return true;
 824                 }
 825                 /*
 826                 if (!strncmp(string, "ping", 4))
 827                 {
 828                         if (developer.integer)
 829                                 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
 830                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
 831                         return true;
 832                 }
 833                 if (!strncmp(string, "ack", 3))
 834                         return true;
 835                 */
 836                 // we may not have liked the packet, but it was a command packet, so
 837                 // we're done processing this packet now
 838                 return true;
 839         }
 840         // netquake control packets, supported for compatibility only
 841         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
 842         {
 843                 c = data[4];
 844                 data += 5;
 845                 length -= 5;
 846                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 847                 switch (c)
 848                 {
 849                 case CCREP_ACCEPT:
 850                         if (developer.integer)
 851                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
 852                         if (cls.connect_trying)
 853                         {
 854                                 lhnetaddress_t clientportaddress;
 855                                 clientportaddress = *peeraddress;
 856                                 if (length >= 4)
 857                                 {
 858                                         unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
 859                                         data += 4;
 860                                         length -= 4;
 861                                         LHNETADDRESS_SetPort(&clientportaddress, port);
 862                                 }
 863                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress);
 864                         }
 865                         break;
 866                 case CCREP_REJECT:
 867                         if (developer.integer)
 868                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
 869                         Con_Printf("%s\n", data);
 870                         strlcpy (m_return_reason, data, sizeof (m_return_reason));
 871                         break;
 872 #if 0
 873                 case CCREP_SERVER_INFO:
 874                         if (developer.integer)
 875                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
 876                         if (cls.state != ca_dedicated)
 877                         {
 878                                 // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address
 879                                 // string we just ignore it and keep the real address
 880                                 MSG_ReadString();
 881                                 // hostcache only uses text addresses
 882                                 cname = UDP_AddrToString(readaddr);
 883                                 // search the cache for this server
 884                                 for (n = 0; n < hostCacheCount; n++)
 885                                         if (!strcmp(cname, hostcache[n].cname))
 886                                                 break;
 887                                 // add it
 888                                 if (n == hostCacheCount && hostCacheCount < HOSTCACHESIZE)
 889                                 {
 890                                         hostCacheCount++;
 891                                         memset(&hostcache[n], 0, sizeof(hostcache[n]));
 892                                         strlcpy (hostcache[n].name, MSG_ReadString(), sizeof (hostcache[n].name));
 893                                         strlcpy (hostcache[n].map, MSG_ReadString(), sizeof (hostcache[n].map));
 894                                         hostcache[n].users = MSG_ReadByte();
 895                                         hostcache[n].maxusers = MSG_ReadByte();
 896                                         c = MSG_ReadByte();
 897                                         if (c != NET_PROTOCOL_VERSION)
 898                                         {
 899                                                 strlcpy (hostcache[n].cname, hostcache[n].name, sizeof (hostcache[n].cname));
 900                                                 strcpy(hostcache[n].name, "*");
 901                                                 strlcat (hostcache[n].name, hostcache[n].cname, sizeof(hostcache[n].name));
 902                                         }
 903                                         strlcpy (hostcache[n].cname, cname, sizeof (hostcache[n].cname));
 904                                 }
 905                         }
 906                         break;
 907                 case CCREP_PLAYER_INFO:
 908                         // we got a CCREP_PLAYER_INFO??
 909                         //if (developer.integer)
 910                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
 911                         break;
 912                 case CCREP_RULE_INFO:
 913                         // we got a CCREP_RULE_INFO??
 914                         //if (developer.integer)
 915                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
 916                         break;
 917 #endif
 918                 default:
 919                         break;
 920                 }
 921                 // we may not have liked the packet, but it was a valid control
 922                 // packet, so we're done processing this packet now
 923                 return true;
 924         }
 925         ret = 0;
 926         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)
 927                 CL_ParseServerMessage();
 928         return ret;
 929 }
 930
 931 void NetConn_ClientFrame(void)
 932 {
 933         int i, length;
 934         lhnetaddress_t peeraddress;
 935         netconn_t *conn;
 936         NetConn_UpdateServerStuff();
 937         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
 938         {
 939                 if (cls.connect_remainingtries == 0)
 940                 {
 941                         cls.connect_trying = false;
 942                         if (m_state == m_slist)
 943                                 strcpy (m_return_reason, "Connect: Failed");
 944                         else
 945                                 Con_Printf("Connect failed\n");
 946                         return;
 947                 }
 948                 if (cls.connect_nextsendtime)
 949                 {
 950                         if (m_state == m_slist)
 951                                 strcpy (m_return_reason, "Connect: Still trying");
 952                         else
 953                                 Con_Printf("Still trying...\n");
 954                 }
 955                 else
 956                 {
 957                         if (m_state == m_slist)
 958                                 strcpy (m_return_reason, "Connect: Trying");
 959                         else
 960                                 Con_Printf("Trying...\n");
 961                 }
 962                 cls.connect_nextsendtime = realtime + 1;
 963                 cls.connect_remainingtries--;
 964                 // try challenge first (newer server)
 965                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
 966                 // then try netquake as a fallback (old server, or netquake)
 967                 SZ_Clear(&net_message);
 968                 // save space for the header, filled in later
 969                 MSG_WriteLong(&net_message, 0);
 970                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
 971                 MSG_WriteString(&net_message, "QUAKE");
 972                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
 973                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 974                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
 975                 SZ_Clear(&net_message);
 976         }
 977         for (i = 0;i < cl_numsockets;i++)
 978                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
 979                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
 980         if (cls.netcon && realtime > cls.netcon->timeout)
 981         {
 982                 Con_Printf("Connection timed out\n");
 983                 CL_Disconnect();
 984         }
 985         for (conn = netconn_list;conn;conn = conn->next)
 986                 NetConn_ReSendMessage(conn);
 987 }
 988
 989 #define MAX_CHALLENGES 128
 990 struct
 991 {
 992         lhnetaddress_t address;
 993         double time;
 994         char string[12];
 995 }
 996 challenge[MAX_CHALLENGES];
 997
 998 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
 999 {
1000         int i;
1001         char c;
1002         for (i = 0;i < bufferlength - 1;i++)
1003         {
1004                 do
1005                 {
1006                         c = rand () % (127 - 33) + 33;
1007                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
1008                 buffer[i] = c;
1009         }
1010         buffer[i] = 0;
1011 }
1012
1013 extern void SV_ConnectClient(int clientnum, netconn_t *netconnection);
1014 int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
1015 {
1016         int i, n, ret, clientnum, responselength, best;
1017         double besttime;
1018         client_t *client;
1019         netconn_t *conn;
1020         char *s, *string, response[512], addressstring2[128], stringbuf[16384];
1021
1022         if (sv.active)
1023         {
1024                 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1025                 {
1026                         // received a command string - strip off the packaging and put it
1027                         // into our string buffer with NULL termination
1028                         data += 4;
1029                         length -= 4;
1030                         length = min(length, (int)sizeof(stringbuf) - 1);
1031                         memcpy(stringbuf, data, length);
1032                         stringbuf[length] = 0;
1033                         string = stringbuf;
1034
1035                         if (developer.integer)
1036                         {
1037                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1038                                 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1039                                 Com_HexDumpToConsole(data, length);
1040                         }
1041
1042                         if (length >= 12 && !memcmp(string, "getchallenge", 12))
1043                         {
1044                                 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1045                                 {
1046                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1047                                                 break;
1048                                         if (besttime > challenge[i].time)
1049                                                 besttime = challenge[best = i].time;
1050                                 }
1051                                 // if we did not find an exact match, choose the oldest and
1052                                 // update address and string
1053                                 if (i == MAX_CHALLENGES)
1054                                 {
1055                                         i = best;
1056                                         challenge[i].address = *peeraddress;
1057                                         NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1058                                 }
1059                                 challenge[i].time = realtime;
1060                                 // send the challenge
1061                                 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1062                                 return true;
1063                         }
1064                         if (length > 8 && !memcmp(string, "connect\\", 8))
1065                         {
1066                                 string += 7;
1067                                 length -= 7;
1068                                 if ((s = SearchInfostring(string, "challenge")))
1069                                 {
1070                                         // validate the challenge
1071                                         for (i = 0;i < MAX_CHALLENGES;i++)
1072                                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1073                                                         break;
1074                                         if (i < MAX_CHALLENGES)
1075                                         {
1076                                                 // check engine protocol
1077                                                 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1078                                                 {
1079                                                         if (developer.integer)
1080                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1081                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1082                                                 }
1083                                                 else
1084                                                 {
1085                                                         // see if this is a duplicate connection request
1086                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1087                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1088                                                                         break;
1089                                                         if (clientnum < svs.maxclients)
1090                                                         {
1091                                                                 // duplicate connection request
1092                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1093                                                                 {
1094                                                                         // client is still trying to connect,
1095                                                                         // so we send a duplicate reply
1096                                                                         if (developer.integer)
1097                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1098                                                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1099                                                                 }
1100                                                                 // only kick if old connection seems dead
1101                                                                 if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1102                                                                 {
1103                                                                         // kick off connection and await retry
1104                                                                         client->deadsocket = true;
1105                                                                 }
1106                                                         }
1107                                                         else
1108                                                         {
1109                                                                 // this is a new client, find a slot
1110                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1111                                                                         if (!client->active)
1112                                                                                 break;
1113                                                                 if (clientnum < svs.maxclients)
1114                                                                 {
1115                                                                         // prepare the client struct
1116                                                                         if ((client->entitydatabase4 = EntityFrame4_AllocDatabase(sv_clients_mempool)))
1117                                                                         {
1118                                                                                 if ((conn = NetConn_Open(mysocket, peeraddress)))
1119                                                                                 {
1120                                                                                         // allocated connection
1121                                                                                         LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true);
1122                                                                                         if (developer.integer)
1123                                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1124                                                                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1125                                                                                         // now set up the client
1126                                                                                         SV_ConnectClient(clientnum, conn);
1127                                                                                         NetConn_Heartbeat(1);
1128                                                                                 }
1129                                                                                 else
1130                                                                                         EntityFrame4_FreeDatabase(client->entitydatabase4);
1131                                                                         }
1132                                                                 }
1133                                                                 else
1134                                                                 {
1135                                                                         // server is full
1136                                                                         if (developer.integer)
1137                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1138                                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1139                                                                 }
1140                                                         }
1141                                                 }
1142                                         }
1143                                 }
1144                                 return true;
1145                         }
1146                         if (length >= 7 && !memcmp(string, "getinfo", 7))
1147                         {
1148                                 const char *challenge = NULL;
1149                                 // If there was a challenge in the getinfo message
1150                                 if (length > 8 && string[7] == ' ')
1151                                         challenge = string + 8;
1152                                 for (i = 0, n = 0;i < svs.maxclients;i++)
1153                                         if (svs.clients[i].active)
1154                                                 n++;
1155                                 responselength = snprintf(response, sizeof(response), "\377\377\377\377infoResponse\x0A"
1156                                                         "\\gamename\\%s\\modname\\%s\\sv_maxclients\\%d"
1157                                                         "\\clients\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d%s%s",
1158                                                         gamename, com_modname, svs.maxclients, n,
1159                                                         sv.name, hostname.string, NET_PROTOCOL_VERSION, challenge ? "\\challenge\\" : "", challenge ? challenge : "");
1160                                 // does it fit in the buffer?
1161                                 if (responselength < (int)sizeof(response))
1162                                 {
1163                                         if (developer.integer)
1164                                                 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1165                                         NetConn_WriteString(mysocket, response, peeraddress);
1166                                 }
1167                                 return true;
1168                         }
1169                         /*
1170                         if (!strncmp(string, "ping", 4))
1171                         {
1172                                 if (developer.integer)
1173                                         Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1174                                 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1175                                 return true;
1176                         }
1177                         if (!strncmp(string, "ack", 3))
1178                                 return true;
1179                         */
1180                         // we may not have liked the packet, but it was a command packet, so
1181                         // we're done processing this packet now
1182                         return true;
1183                 }
1184                 // LordHavoc: disabled netquake control packet support in server
1185 #if 0
1186                 {
1187                         int c, control;
1188                         // netquake control packets, supported for compatibility only
1189                         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1190                         {
1191                                 c = data[4];
1192                                 data += 5;
1193                                 length -= 5;
1194                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1195                                 switch (c)
1196                                 {
1197                                 case CCREQ_CONNECT:
1198                                         //if (developer.integer)
1199                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
1200                                         if (length >= (int)strlen("QUAKE") + 1 + 1)
1201                                         {
1202                                                 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
1203                                                 {
1204                                                         if (developer.integer)
1205                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
1206                                                         SZ_Clear(&net_message);
1207                                                         // save space for the header, filled in later
1208                                                         MSG_WriteLong(&net_message, 0);
1209                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1210                                                         MSG_WriteString(&net_message, "Incompatible version.\n");
1211                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1212                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1213                                                         SZ_Clear(&net_message);
1214                                                 }
1215                                                 else
1216                                                 {
1217                                                         // see if this is a duplicate connection request
1218                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1219                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1220                                                                         break;
1221                                                         if (clientnum < svs.maxclients)
1222                                                         {
1223                                                                 // duplicate connection request
1224                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1225                                                                 {
1226                                                                         // client is still trying to connect,
1227                                                                         // so we send a duplicate reply
1228                                                                         if (developer.integer)
1229                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
1230                                                                         SZ_Clear(&net_message);
1231                                                                         // save space for the header, filled in later
1232                                                                         MSG_WriteLong(&net_message, 0);
1233                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1234                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
1235                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1236                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1237                                                                         SZ_Clear(&net_message);
1238                                                                 }
1239                                                                 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1240                                                                 {
1241                                                                         // the old client hasn't sent us anything
1242                                                                         // in quite a while, so kick off and let
1243                                                                         // the retry take care of it...
1244                                                                         client->deadsocket = true;
1245                                                                 }
1246                                                         }
1247                                                         else
1248                                                         {
1249                                                                 // this is a new client, find a slot
1250                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1251                                                                         if (!client->active)
1252                                                                                 break;
1253                                                                 if (clientnum < svs.maxclients && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
1254                                                                 {
1255                                                                         // connect to the client
1256                                                                         // everything is allocated, just fill in the details
1257                                                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
1258                                                                         if (developer.integer)
1259                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
1260                                                                         // send back the info about the server connection
1261                                                                         SZ_Clear(&net_message);
1262                                                                         // save space for the header, filled in later
1263                                                                         MSG_WriteLong(&net_message, 0);
1264                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1265                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
1266                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1267                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1268                                                                         SZ_Clear(&net_message);
1269                                                                         // now set up the client struct
1270                                                                         SV_ConnectClient(clientnum, conn);
1271                                                                         NetConn_Heartbeat(1);
1272                                                                 }
1273                                                                 else
1274                                                                 {
1275                                                                         //if (developer.integer)
1276                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
1277                                                                         // no room; try to let player know
1278                                                                         SZ_Clear(&net_message);
1279                                                                         // save space for the header, filled in later
1280                                                                         MSG_WriteLong(&net_message, 0);
1281                                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1282                                                                         MSG_WriteString(&net_message, "Server is full.\n");
1283                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1284                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1285                                                                         SZ_Clear(&net_message);
1286                                                                 }
1287                                                         }
1288                                                 }
1289                                         }
1290                                         break;
1291 #if 0
1292                                 case CCREQ_SERVER_INFO:
1293                                         if (developer.integer)
1294                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
1295                                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
1296                                         {
1297                                                 if (developer.integer)
1298                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
1299                                                 SZ_Clear(&net_message);
1300                                                 // save space for the header, filled in later
1301                                                 MSG_WriteLong(&net_message, 0);
1302                                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
1303                                                 UDP_GetSocketAddr(UDP_acceptSock, &newaddr);
1304                                                 MSG_WriteString(&net_message, UDP_AddrToString(&newaddr));
1305                                                 MSG_WriteString(&net_message, hostname.string);
1306                                                 MSG_WriteString(&net_message, sv.name);
1307                                                 MSG_WriteByte(&net_message, net_activeconnections);
1308                                                 MSG_WriteByte(&net_message, svs.maxclients);
1309                                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1310                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1311                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1312                                                 SZ_Clear(&net_message);
1313                                         }
1314                                         break;
1315                                 case CCREQ_PLAYER_INFO:
1316                                         if (developer.integer)
1317                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
1318                                         if (sv.active)
1319                                         {
1320                                                 int playerNumber, activeNumber, clientNumber;
1321                                                 client_t *client;
1322
1323                                                 playerNumber = MSG_ReadByte();
1324                                                 activeNumber = -1;
1325                                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
1326                                                         if (client->active && ++activeNumber == playerNumber)
1327                                                                 break;
1328                                                 if (clientNumber != svs.maxclients)
1329                                                 {
1330                                                         SZ_Clear(&net_message);
1331                                                         // save space for the header, filled in later
1332                                                         MSG_WriteLong(&net_message, 0);
1333                                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
1334                                                         MSG_WriteByte(&net_message, playerNumber);
1335                                                         MSG_WriteString(&net_message, client->name);
1336                                                         MSG_WriteLong(&net_message, client->colors);
1337                                                         MSG_WriteLong(&net_message, (int)client->edict->v->frags);
1338                                                         MSG_WriteLong(&net_message, (int)(realtime - client->netconnection->connecttime));
1339                                                         MSG_WriteString(&net_message, client->netconnection->address);
1340                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1341                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1342                                                         SZ_Clear(&net_message);
1343                                                 }
1344                                         }
1345                                         break;
1346                                 case CCREQ_RULE_INFO:
1347                                         if (developer.integer)
1348                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
1349                                         if (sv.active)
1350                                         {
1351                                                 char *prevCvarName;
1352                                                 cvar_t *var;
1353
1354                                                 // find the search start location
1355                                                 prevCvarName = MSG_ReadString();
1356                                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
1357
1358                                                 // send the response
1359                                                 SZ_Clear(&net_message);
1360                                                 // save space for the header, filled in later
1361                                                 MSG_WriteLong(&net_message, 0);
1362                                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
1363                                                 if (var)
1364                                                 {
1365                                                         MSG_WriteString(&net_message, var->name);
1366                                                         MSG_WriteString(&net_message, var->string);
1367                                                 }
1368                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1369                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1370                                                 SZ_Clear(&net_message);
1371                                         }
1372                                         break;
1373 #endif
1374                                 default:
1375                                         break;
1376                                 }
1377                                 // we may not have liked the packet, but it was a valid control
1378                                 // packet, so we're done processing this packet now
1379                                 return true;
1380                         }
1381                 }
1382 #endif
1383                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1384                 {
1385                         if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1386                         {
1387                                 sv_player = host_client->edict;
1388                                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length)) == 2)
1389                                         SV_ReadClientMessage();
1390                                 return ret;
1391                         }
1392                 }
1393         }
1394         return 0;
1395 }
1396
1397 void NetConn_ServerFrame(void)
1398 {
1399         int i, length;
1400         lhnetaddress_t peeraddress;
1401         netconn_t *conn;
1402         NetConn_UpdateServerStuff();
1403         for (i = 0;i < sv_numsockets;i++)
1404                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1405                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
1406         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1407         {
1408                 // never timeout loopback connections
1409                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(host_client->netconnection->mysocket)) != LHNETADDRESSTYPE_LOOP)
1410                 {
1411                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
1412                         sv_player = host_client->edict;
1413                         SV_DropClient(false);
1414                 }
1415         }
1416         for (conn = netconn_list;conn;conn = conn->next)
1417                 NetConn_ReSendMessage(conn);
1418 }
1419
1420 void NetConn_QueryMasters(void)
1421 {
1422         int i;
1423         int masternum;
1424         lhnetaddress_t masteraddress;
1425         char request[256];
1426
1427         if (hostCacheCount >= HOSTCACHESIZE)
1428                 return;
1429
1430         for (i = 0;i < cl_numsockets;i++)
1431         {
1432                 if (cl_sockets[i])
1433                 {
1434 #if 0
1435                         // search LAN
1436 #if 1
1437                         UDP_Broadcast(UDP_controlSock, "\377\377\377\377getinfo", 11);
1438 #else
1439                         SZ_Clear(&net_message);
1440                         // save space for the header, filled in later
1441                         MSG_WriteLong(&net_message, 0);
1442                         MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
1443                         MSG_WriteString(&net_message, "QUAKE");
1444                         MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1445                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1446                         UDP_Broadcast(UDP_controlSock, net_message.data, net_message.cursize);
1447                         SZ_Clear(&net_message);
1448 #endif
1449 #endif
1450
1451                         // build the getservers
1452                         snprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
1453
1454                         // search internet
1455                         for (masternum = 0;sv_masters[masternum].name;masternum++)
1456                         {
1457                                 if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
1458                                 {
1459                                         masterquerycount++;
1460                                         NetConn_WriteString(cl_sockets[i], request, &masteraddress);
1461                                 }
1462                         }
1463                 }
1464         }
1465         if (!masterquerycount)
1466         {
1467                 Con_Printf("Unable to query master servers, no suitable network sockets active.\n");
1468                 strcpy(m_return_reason, "No network");
1469         }
1470 }
1471
1472 void NetConn_Heartbeat(int priority)
1473 {
1474         lhnetaddress_t masteraddress;
1475         int masternum;
1476         lhnetsocket_t *mysocket;
1477
1478         // if it's a state change (client connected), limit next heartbeat to no
1479         // more than 30 sec in the future
1480         if (priority == 1 && nextheartbeattime > realtime + 30.0)
1481                 nextheartbeattime = realtime + 30.0;
1482
1483         // limit heartbeatperiod to 30 to 270 second range,
1484         // lower limit is to avoid abusing master servers with excess traffic,
1485         // upper limit is to avoid timing out on the master server (which uses
1486         // 300 sec timeout)
1487         if (sv_heartbeatperiod.value < 30)
1488                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
1489         if (sv_heartbeatperiod.value > 270)
1490                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
1491
1492         // make advertising optional and don't advertise singleplayer games, and
1493         // only send a heartbeat as often as the admin wants
1494         if (sv.active && sv_public.integer && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
1495         {
1496                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
1497                 for (masternum = 0;sv_masters[masternum].name;masternum++)
1498                         if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
1499                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
1500         }
1501 }
1502
1503 int NetConn_SendToAll(sizebuf_t *data, double blocktime)
1504 {
1505         int i, count = 0;
1506         qbyte sent[MAX_SCOREBOARD];
1507
1508         memset(sent, 0, sizeof(sent));
1509
1510         // simultaneously wait for the first CanSendMessage and send the message,
1511         // then wait for a second CanSendMessage (verifying it was received), or
1512         // the client drops and is no longer counted
1513         // the loop aborts when either it runs out of clients to send to, or a
1514         // timeout expires
1515         blocktime += Sys_DoubleTime();
1516         do
1517         {
1518                 count = 0;
1519                 NetConn_ClientFrame();
1520                 NetConn_ServerFrame();
1521                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1522                 {
1523                         if (host_client->netconnection)
1524                         {
1525                                 if (NetConn_CanSendMessage(host_client->netconnection))
1526                                 {
1527                                         if (!sent[i])
1528                                                 NetConn_SendReliableMessage(host_client->netconnection, data);
1529                                         sent[i] = true;
1530                                 }
1531                                 if (!NetConn_CanSendMessage(host_client->netconnection))
1532                                         count++;
1533                         }
1534                 }
1535         }
1536         while (count && Sys_DoubleTime() < blocktime);
1537         return count;
1538 }
1539
1540 static void Net_Heartbeat_f(void)
1541 {
1542         if (sv.active)
1543                 NetConn_Heartbeat(2);
1544         else
1545                 Con_Printf("No server running, can not heartbeat to master server.\n");
1546 }
1547
1548 void PrintStats(netconn_t *conn)
1549 {
1550         Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, conn->canSend, conn->sendSequence, conn->receiveSequence);
1551 }
1552
1553 void Net_Stats_f(void)
1554 {
1555         netconn_t *conn;
1556         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
1557         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
1558         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
1559         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
1560         Con_Printf("packetsSent                = %i\n", packetsSent);
1561         Con_Printf("packetsReSent              = %i\n", packetsReSent);
1562         Con_Printf("packetsReceived            = %i\n", packetsReceived);
1563         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
1564         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
1565         Con_Printf("connections                =\n");
1566         for (conn = netconn_list;conn;conn = conn->next)
1567                 PrintStats(conn);
1568 }
1569
1570 void Net_Slist_f(void)
1571 {
1572         masterquerytime = realtime;
1573         masterquerycount = 0;
1574         masterreplycount = 0;
1575         serverquerycount = 0;
1576         serverreplycount = 0;
1577         hostCacheCount = 0;
1578         memset(&pingcache, 0, sizeof(pingcache));
1579         if (m_state != m_slist)
1580                 Con_Printf("Sending requests to master servers\n");
1581         NetConn_QueryMasters();
1582         if (m_state != m_slist)
1583                 Con_Printf("Listening for replies...\n");
1584 }
1585
1586 void NetConn_Init(void)
1587 {
1588         int i;
1589         lhnetaddress_t tempaddress;
1590         netconn_mempool = Mem_AllocPool("Networking");
1591         Cmd_AddCommand("net_stats", Net_Stats_f);
1592         Cmd_AddCommand("net_slist", Net_Slist_f);
1593         Cmd_AddCommand("heartbeat", Net_Heartbeat_f);
1594         Cvar_RegisterVariable(&net_messagetimeout);
1595         Cvar_RegisterVariable(&net_messagerejointimeout);
1596         Cvar_RegisterVariable(&net_connecttimeout);
1597         Cvar_RegisterVariable(&cl_fakelocalping_min);
1598         Cvar_RegisterVariable(&cl_fakelocalping_max);
1599         Cvar_RegisterVariable(&cl_fakepacketloss_receive);
1600         Cvar_RegisterVariable(&cl_fakepacketloss_send);
1601         Cvar_RegisterVariable(&sv_fakepacketloss_receive);
1602         Cvar_RegisterVariable(&sv_fakepacketloss_send);
1603         Cvar_RegisterVariable(&hostname);
1604         Cvar_RegisterVariable(&developer_networking);
1605         Cvar_RegisterVariable(&cl_netport);
1606         Cvar_RegisterVariable(&sv_netport);
1607         Cvar_RegisterVariable(&net_address);
1608         //Cvar_RegisterVariable(&net_address_ipv6);
1609         Cvar_RegisterVariable(&sv_public);
1610         Cvar_RegisterVariable(&sv_heartbeatperiod);
1611         for (i = 0;sv_masters[i].name;i++)
1612                 Cvar_RegisterVariable(&sv_masters[i]);
1613         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
1614         {
1615                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
1616                 {
1617                         Con_Printf("-ip option used, setting net_address to \"%s\"\n");
1618                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
1619                 }
1620                 else
1621                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
1622         }
1623         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
1624         {
1625                 i = atoi(com_argv[i + 1]);
1626                 if (i >= 0 && i < 65536)
1627                 {
1628                         Con_Printf("-port option used, setting port cvar to %i\n", i);
1629                         Cvar_SetValueQuick(&sv_netport, i);
1630                 }
1631                 else
1632                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
1633         }
1634         cl_numsockets = 0;
1635         sv_numsockets = 0;
1636         memset(&pingcache, 0, sizeof(pingcache));
1637         SZ_Alloc(&net_message, NET_MAXMESSAGE, "net_message");
1638         LHNET_Init();
1639 }
1640
1641 void NetConn_Shutdown(void)
1642 {
1643         NetConn_CloseClientPorts();
1644         NetConn_CloseServerPorts();
1645         LHNET_Shutdown();
1646 }
1647