netconn.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3 Copyright (C) 2002 Mathieu Olivier
   4 Copyright (C) 2003 Forest Hale
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  14
  15 See the GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20
  21 */
  22
  23 #include "quakedef.h"
  24 #include "lhnet.h"
  25
  26 #define MASTER_PORT 27950
  27
  28 cvar_t sv_public = {0, "sv_public", "0"};
  29 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "180"};
  30
  31 static cvar_t sv_masters [] =
  32 {
  33         {CVAR_SAVE, "sv_master1", ""},
  34         {CVAR_SAVE, "sv_master2", ""},
  35         {CVAR_SAVE, "sv_master3", ""},
  36         {CVAR_SAVE, "sv_master4", ""},
  37         {0, "sv_masterextra1", "198.88.152.4"},
  38         {0, "sv_masterextra2", "68.102.242.12"},
  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 int hostCacheCount = 0;
  73 hostcache_t hostcache[HOSTCACHESIZE];
  74
  75 static qbyte sendbuffer[NET_MAXMESSAGE];
  76 static qbyte readbuffer[NET_MAXMESSAGE];
  77
  78 int cl_numsockets;
  79 lhnetsocket_t *cl_sockets[16];
  80 int sv_numsockets;
  81 lhnetsocket_t *sv_sockets[16];
  82
  83 netconn_t *netconn_list = NULL;
  84 mempool_t *netconn_mempool = NULL;
  85
  86 cvar_t cl_netport = {0, "cl_port", "0"};
  87 cvar_t cl_netaddress = {0, "cl_netaddress", "0.0.0.0"};
  88 cvar_t cl_netaddress_ipv6 = {0, "cl_netaddress_ipv6", "[0:0:0:0:0:0:0:0]:0"};
  89
  90 cvar_t sv_netport = {0, "port", "26000"};
  91 cvar_t sv_netaddress = {0, "sv_netaddress", "0.0.0.0"};
  92 cvar_t sv_netaddress_ipv6 = {0, "sv_netaddress_ipv6", "[0:0:0:0:0:0:0:0]:26000"};
  93
  94 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
  95 {
  96         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
  97         int i;
  98         if (cl_fakepacketloss_receive.integer)
  99                 for (i = 0;i < cl_numsockets;i++)
 100                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_fakepacketloss_receive.integer)
 101                                 return 0;
 102         if (sv_fakepacketloss_receive.integer)
 103                 for (i = 0;i < cl_numsockets;i++)
 104                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_fakepacketloss_receive.integer)
 105                                 return 0;
 106         if (developer_networking.integer && length != 0)
 107         {
 108                 char addressstring[128], addressstring2[128];
 109                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 110                 if (length > 0)
 111                 {
 112                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 113                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
 114                         Com_HexDumpToConsole(data, length);
 115                 }
 116                 else
 117                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
 118         }
 119         return length;
 120 }
 121
 122 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 123 {
 124         int ret;
 125         int i;
 126         if (cl_fakepacketloss_send.integer)
 127                 for (i = 0;i < cl_numsockets;i++)
 128                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_fakepacketloss_send.integer)
 129                                 return length;
 130         if (sv_fakepacketloss_send.integer)
 131                 for (i = 0;i < cl_numsockets;i++)
 132                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_fakepacketloss_send.integer)
 133                                 return length;
 134         ret = LHNET_Write(mysocket, data, length, peeraddress);
 135         if (developer_networking.integer)
 136         {
 137                 char addressstring[128], addressstring2[128];
 138                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 139                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 140                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 141                 Com_HexDumpToConsole(data, length);
 142         }
 143         return ret;
 144 }
 145
 146 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 147 {
 148         // note this does not include the trailing NULL because we add that in the parser
 149         return NetConn_Write(mysocket, string, strlen(string), peeraddress);
 150 }
 151
 152 int NetConn_SendReliableMessage(netconn_t *conn, sizebuf_t *data)
 153 {
 154         unsigned int packetLen;
 155         unsigned int dataLen;
 156         unsigned int eom;
 157         unsigned int *header;
 158
 159 //#ifdef DEBUG
 160         if (data->cursize == 0)
 161                 Sys_Error("Datagram_SendMessage: zero length message\n");
 162
 163         if (data->cursize > NET_MAXMESSAGE)
 164                 Sys_Error("Datagram_SendMessage: message too big %u\n", data->cursize);
 165
 166         if (conn->canSend == false)
 167                 Sys_Error("SendMessage: called with canSend == false\n");
 168 //#endif
 169
 170         memcpy(conn->sendMessage, data->data, data->cursize);
 171         conn->sendMessageLength = data->cursize;
 172
 173         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 174         {
 175                 dataLen = conn->sendMessageLength;
 176                 eom = NETFLAG_EOM;
 177         }
 178         else
 179         {
 180                 dataLen = MAX_PACKETFRAGMENT;
 181                 eom = 0;
 182         }
 183
 184         packetLen = NET_HEADERSIZE + dataLen;
 185
 186         header = (void *)sendbuffer;
 187         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 188         header[1] = BigLong(conn->sendSequence);
 189         memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 190
 191         conn->sendSequence++;
 192         conn->canSend = false;
 193
 194         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 195                 return -1;
 196
 197         conn->lastSendTime = realtime;
 198         packetsSent++;
 199         reliableMessagesSent++;
 200         return 1;
 201 }
 202
 203 static void NetConn_SendMessageNext(netconn_t *conn)
 204 {
 205         unsigned int packetLen;
 206         unsigned int dataLen;
 207         unsigned int eom;
 208         unsigned int *header;
 209
 210         if (conn->sendMessageLength && !conn->canSend && conn->sendNext)
 211         {
 212                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 213                 {
 214                         dataLen = conn->sendMessageLength;
 215                         eom = NETFLAG_EOM;
 216                 }
 217                 else
 218                 {
 219                         dataLen = MAX_PACKETFRAGMENT;
 220                         eom = 0;
 221                 }
 222
 223                 packetLen = NET_HEADERSIZE + dataLen;
 224
 225                 header = (void *)sendbuffer;
 226                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 227                 header[1] = BigLong(conn->sendSequence);
 228                 memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 229
 230                 conn->sendSequence++;
 231                 conn->sendNext = false;
 232
 233                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 234                         return;
 235
 236                 conn->lastSendTime = realtime;
 237                 packetsSent++;
 238         }
 239 }
 240
 241 static void NetConn_ReSendMessage(netconn_t *conn)
 242 {
 243         unsigned int packetLen;
 244         unsigned int dataLen;
 245         unsigned int eom;
 246         unsigned int *header;
 247
 248         if (conn->sendMessageLength && !conn->canSend && (realtime - conn->lastSendTime) > 1.0)
 249         {
 250                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 251                 {
 252                         dataLen = conn->sendMessageLength;
 253                         eom = NETFLAG_EOM;
 254                 }
 255                 else
 256                 {
 257                         dataLen = MAX_PACKETFRAGMENT;
 258                         eom = 0;
 259                 }
 260
 261                 packetLen = NET_HEADERSIZE + dataLen;
 262
 263                 header = (void *)sendbuffer;
 264                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 265                 header[1] = BigLong(conn->sendSequence - 1);
 266                 memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
 267
 268                 conn->sendNext = false;
 269
 270                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 271                         return;
 272
 273                 conn->lastSendTime = realtime;
 274                 packetsReSent++;
 275         }
 276 }
 277
 278 qboolean NetConn_CanSendMessage(netconn_t *conn)
 279 {
 280         return conn->canSend;
 281 }
 282
 283 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data)
 284 {
 285         int packetLen;
 286         int *header;
 287
 288 #ifdef DEBUG
 289         if (data->cursize == 0)
 290                 Sys_Error("Datagram_SendUnreliableMessage: zero length message\n");
 291
 292         if (data->cursize > MAX_DATAGRAM)
 293                 Sys_Error("Datagram_SendUnreliableMessage: message too big %u\n", data->cursize);
 294 #endif
 295
 296         packetLen = NET_HEADERSIZE + data->cursize;
 297
 298         header = (void *)sendbuffer;
 299         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
 300         header[1] = BigLong(conn->unreliableSendSequence);
 301         memcpy(sendbuffer + 8, data->data, data->cursize);
 302
 303         conn->unreliableSendSequence++;
 304
 305         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 306                 return -1;
 307
 308         packetsSent++;
 309         unreliableMessagesSent++;
 310         return 1;
 311 }
 312
 313 void NetConn_CloseClientPorts(void)
 314 {
 315         for (;cl_numsockets > 0;cl_numsockets--)
 316                 if (cl_sockets[cl_numsockets - 1])
 317                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 318 }
 319
 320 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
 321 {
 322         lhnetaddress_t address;
 323         lhnetsocket_t *s;
 324         char addressstring2[1024];
 325         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 326         {
 327                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 328                 {
 329                         cl_sockets[cl_numsockets++] = s;
 330                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 331                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
 332                 }
 333                 else
 334                 {
 335                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 336                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 337                 }
 338         }
 339         else
 340                 Con_Printf("Client unable to parse address %s\n", addressstring);
 341 }
 342
 343 void NetConn_OpenClientPorts(void)
 344 {
 345         int port;
 346         NetConn_CloseClientPorts();
 347         port = bound(0, cl_netport.integer, 65535);
 348         if (cl_netport.integer != port)
 349                 Cvar_SetValueQuick(&cl_netport, port);
 350         Con_Printf("Client using port %i\n", port);
 351         NetConn_OpenClientPort("local", port);
 352         NetConn_OpenClientPort(cl_netaddress.string, port);
 353         NetConn_OpenClientPort(cl_netaddress_ipv6.string, port);
 354 }
 355
 356 void NetConn_CloseServerPorts(void)
 357 {
 358         for (;sv_numsockets > 0;sv_numsockets--)
 359                 if (sv_sockets[sv_numsockets - 1])
 360                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 361 }
 362
 363 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
 364 {
 365         lhnetaddress_t address;
 366         lhnetsocket_t *s;
 367         char addressstring2[1024];
 368         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 369         {
 370                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 371                 {
 372                         sv_sockets[sv_numsockets++] = s;
 373                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 374                         Con_Printf("Server listening on address %s\n", addressstring2);
 375                 }
 376                 else
 377                 {
 378                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 379                         Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 380                 }
 381         }
 382         else
 383                 Con_Printf("Server unable to parse address %s\n", addressstring);
 384 }
 385
 386 void NetConn_OpenServerPorts(int opennetports)
 387 {
 388         int port;
 389         NetConn_CloseServerPorts();
 390         port = bound(0, sv_netport.integer, 65535);
 391         if (port == 0)
 392                 port = 26000;
 393         Con_Printf("Server using port %i\n", port);
 394         if (sv_netport.integer != port)
 395                 Cvar_SetValueQuick(&sv_netport, port);
 396         if (cls.state != ca_dedicated)
 397                 NetConn_OpenServerPort("local", port);
 398         if (opennetports)
 399         {
 400                 NetConn_OpenServerPort(sv_netaddress.string, port);
 401                 NetConn_OpenServerPort(sv_netaddress_ipv6.string, port);
 402         }
 403         if (sv_numsockets == 0)
 404                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!\n");
 405 }
 406
 407 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
 408 {
 409         int i, a = LHNETADDRESS_GetAddressType(address);
 410         for (i = 0;i < cl_numsockets;i++)
 411                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
 412                         return cl_sockets[i];
 413         return NULL;
 414 }
 415
 416 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
 417 {
 418         int i, a = LHNETADDRESS_GetAddressType(address);
 419         for (i = 0;i < sv_numsockets;i++)
 420                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
 421                         return sv_sockets[i];
 422         return NULL;
 423 }
 424
 425 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 426 {
 427         netconn_t *conn;
 428         conn = Mem_Alloc(netconn_mempool, sizeof(*conn));
 429         conn->mysocket = mysocket;
 430         conn->peeraddress = *peeraddress;
 431         conn->canSend = true;
 432         conn->connecttime = realtime;
 433         conn->lastMessageTime = realtime;
 434         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
 435         // reduce effectiveness of connection request floods
 436         conn->timeout = realtime + net_connecttimeout.value;
 437         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
 438         conn->next = netconn_list;
 439         netconn_list = conn;
 440         return conn;
 441 }
 442
 443 void NetConn_Close(netconn_t *conn)
 444 {
 445         netconn_t *c;
 446         // remove connection from list
 447         if (conn == netconn_list)
 448                 netconn_list = conn->next;
 449         else
 450         {
 451                 for (c = netconn_list;c;c = c->next)
 452                 {
 453                         if (c->next == conn)
 454                         {
 455                                 c->next = conn->next;
 456                                 break;
 457                         }
 458                 }
 459                 // not found in list, we'll avoid crashing here...
 460                 if (!c)
 461                         return;
 462         }
 463         // free connection
 464         Mem_Free(conn);
 465 }
 466
 467 static int clientport = -1;
 468 static int clientport2 = -1;
 469 static int hostport = -1;
 470 static void NetConn_UpdateServerStuff(void)
 471 {
 472         if (clientport2 != cl_netport.integer)
 473         {
 474                 clientport2 = cl_netport.integer;
 475                 if (cls.state == ca_connected)
 476                         Con_Printf("Changing \"cl_port\" will not take effect until you reconnect.\n");
 477         }
 478         if (cls.state != ca_dedicated)
 479         {
 480                 if (cls.state == ca_disconnected && clientport != cl_netport.integer)
 481                 {
 482                         clientport = cl_netport.integer;
 483                         NetConn_CloseClientPorts();
 484                 }
 485                 if (cl_numsockets == 0)
 486                         NetConn_OpenClientPorts();
 487         }
 488
 489         if (hostport != sv_netport.integer)
 490         {
 491                 hostport = sv_netport.integer;
 492                 if (sv.active)
 493                         Con_Printf("Changing \"port\" will not take effect until \"map\" command is executed.\n");
 494         }
 495 }
 496
 497 int NetConn_ReceivedMessage(netconn_t *conn, qbyte *data, int length)
 498 {
 499         unsigned int count;
 500         unsigned int flags;
 501         unsigned int sequence;
 502
 503         if (length >= 8)
 504         {
 505                 length = BigLong(((int *)data)[0]);
 506                 flags = length & ~NETFLAG_LENGTH_MASK;
 507                 length &= NETFLAG_LENGTH_MASK;
 508                 // control packets were already handled
 509                 if (!(flags & NETFLAG_CTL))
 510                 {
 511                         sequence = BigLong(((int *)data)[1]);
 512                         packetsReceived++;
 513                         data += 8;
 514                         length -= 8;
 515                         if (flags & NETFLAG_UNRELIABLE)
 516                         {
 517                                 if (sequence >= conn->unreliableReceiveSequence)
 518                                 {
 519                                         if (sequence > conn->unreliableReceiveSequence)
 520                                         {
 521                                                 count = sequence - conn->unreliableReceiveSequence;
 522                                                 droppedDatagrams += count;
 523                                                 Con_DPrintf("Dropped %u datagram(s)\n", count);
 524                                         }
 525                                         conn->unreliableReceiveSequence = sequence + 1;
 526                                         conn->lastMessageTime = realtime;
 527                                         conn->timeout = realtime + net_messagetimeout.value;
 528                                         unreliableMessagesReceived++;
 529                                         if (length > 0)
 530                                         {
 531                                                 SZ_Clear(&net_message);
 532                                                 SZ_Write(&net_message, data, length);
 533                                                 MSG_BeginReading();
 534                                                 return 2;
 535                                         }
 536                                 }
 537                                 else
 538                                         Con_DPrintf("Got a stale datagram\n");
 539                                 return 1;
 540                         }
 541                         else if (flags & NETFLAG_ACK)
 542                         {
 543                                 if (sequence == (conn->sendSequence - 1))
 544                                 {
 545                                         if (sequence == conn->ackSequence)
 546                                         {
 547                                                 conn->ackSequence++;
 548                                                 if (conn->ackSequence != conn->sendSequence)
 549                                                         Con_DPrintf("ack sequencing error\n");
 550                                                 conn->lastMessageTime = realtime;
 551                                                 conn->timeout = realtime + net_messagetimeout.value;
 552                                                 conn->sendMessageLength -= MAX_PACKETFRAGMENT;
 553                                                 if (conn->sendMessageLength > 0)
 554                                                 {
 555                                                         memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
 556                                                         conn->sendNext = true;
 557                                                         NetConn_SendMessageNext(conn);
 558                                                 }
 559                                                 else
 560                                                 {
 561                                                         conn->sendMessageLength = 0;
 562                                                         conn->canSend = true;
 563                                                 }
 564                                         }
 565                                         else
 566                                                 Con_DPrintf("Duplicate ACK received\n");
 567                                 }
 568                                 else
 569                                         Con_DPrintf("Stale ACK received\n");
 570                                 return 1;
 571                         }
 572                         else if (flags & NETFLAG_DATA)
 573                         {
 574                                 unsigned int temppacket[2];
 575                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
 576                                 temppacket[1] = BigLong(sequence);
 577                                 NetConn_Write(conn->mysocket, (qbyte *)temppacket, 8, &conn->peeraddress);
 578                                 if (sequence == conn->receiveSequence)
 579                                 {
 580                                         conn->lastMessageTime = realtime;
 581                                         conn->timeout = realtime + net_messagetimeout.value;
 582                                         conn->receiveSequence++;
 583                                         memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
 584                                         conn->receiveMessageLength += length;
 585                                         if (flags & NETFLAG_EOM)
 586                                         {
 587                                                 reliableMessagesReceived++;
 588                                                 length = conn->receiveMessageLength;
 589                                                 conn->receiveMessageLength = 0;
 590                                                 if (length > 0)
 591                                                 {
 592                                                         SZ_Clear(&net_message);
 593                                                         SZ_Write(&net_message, conn->receiveMessage, length);
 594                                                         MSG_BeginReading();
 595                                                         return 2;
 596                                                 }
 597                                         }
 598                                 }
 599                                 else
 600                                         receivedDuplicateCount++;
 601                                 return 1;
 602                         }
 603                 }
 604         }
 605         return 0;
 606 }
 607
 608 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 609 {
 610         cls.netcon = NetConn_Open(mysocket, peeraddress);
 611         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
 612         key_dest = key_game;
 613         m_state = m_none;
 614         cls.connect_trying = false;
 615         cls.demonum = -1;                       // not in the demo loop now
 616         cls.state = ca_connected;
 617         cls.signon = 0;                         // need all the signon messages before playing
 618         CL_ClearState();
 619         Host_Reconnect_f();
 620 }
 621
 622 int NetConn_IsLocalGame(void)
 623 {
 624         int i;
 625         if (cls.state == ca_connected && sv.active/* && LHNETADDRESS_GetAddressType(cl.netcon->peeraddress) == LHNETADDRESSTYPE_LOOP*/)
 626         {
 627                 // make sure there are no other connected clients
 628                 for (i = 1;i < MAX_SCOREBOARD;i++)
 629                         if (svs.connectedclients[i])
 630                                 return false;
 631                 return true;
 632         }
 633         return false;
 634 }
 635
 636 static struct
 637 {
 638         double senttime;
 639         lhnetaddress_t peeraddress;
 640 }
 641 pingcache[HOSTCACHESIZE];
 642
 643 int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
 644 {
 645         int ret, c, control;
 646         lhnetaddress_t svaddress;
 647         const char *s;
 648         char *string, addressstring2[128], cname[128], ipstring[32];
 649         char stringbuf[16384];
 650
 651         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
 652         {
 653                 // received a command string - strip off the packaging and put it
 654                 // into our string buffer with NULL termination
 655                 data += 4;
 656                 length -= 4;
 657                 length = min(length, (int)sizeof(stringbuf) - 1);
 658                 memcpy(stringbuf, data, length);
 659                 stringbuf[length] = 0;
 660                 string = stringbuf;
 661
 662                 if (developer.integer)
 663                 {
 664                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 665                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
 666                         Com_HexDumpToConsole(data, length);
 667                 }
 668
 669                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
 670                 {
 671                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 672                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
 673                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\challenge\\%s", string + 10), peeraddress);
 674                         return true;
 675                 }
 676                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
 677                 {
 678                         NetConn_ConnectionEstablished(mysocket, peeraddress);
 679                         return true;
 680                 }
 681                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
 682                 {
 683                         cls.connect_trying = false;
 684                         string += 7;
 685                         length = max(length - 7, (int)sizeof(m_return_reason) - 1);
 686                         memcpy(m_return_reason, string, length);
 687                         m_return_reason[length] = 0;
 688                         Con_Printf("%s\n", m_return_reason);
 689                         return true;
 690                 }
 691                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
 692                 {
 693                         int i, j, c, n, users, maxusers;
 694                         char game[32], mod[32], map[32], name[128];
 695                         double pingtime;
 696                         hostcache_t temp;
 697                         string += 13;
 698                         // hostcache only uses text addresses
 699                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
 700                         // search the cache for this server
 701                         for (n = 0; n < hostCacheCount; n++)
 702                                 if (!strcmp(cname, hostcache[n].cname))
 703                                         break;
 704                         // add it or update it
 705                         if (n == hostCacheCount)
 706                         {
 707                                 // if cache is full replace highest ping server (the list is
 708                                 // kept sorted so this is always the last, and if this server
 709                                 // is good it will be sorted into an early part of the list)
 710                                 if (hostCacheCount >= HOSTCACHESIZE)
 711                                         n = hostCacheCount - 1;
 712                                 else
 713                                         hostCacheCount++;
 714                         }
 715                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strncpy(game, s, sizeof(game) - 1);else game[0] = 0;
 716                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strncpy(mod , s, sizeof(mod ) - 1);else mod[0] = 0;
 717                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strncpy(map , s, sizeof(map ) - 1);else map[0] = 0;
 718                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strncpy(name, s, sizeof(name) - 1);else name[0] = 0;
 719                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) c = atoi(s);else c = -1;
 720                         if ((s = SearchInfostring(string, "clients"      )) != NULL) users = atoi(s);else users = 0;
 721                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) maxusers = atoi(s);else maxusers = 0;
 722                         pingtime = 9999;
 723                         for (i = 0;i < HOSTCACHESIZE;i++)
 724                                 if (!LHNETADDRESS_Compare(peeraddress, &pingcache[i].peeraddress))
 725                                         pingtime = (int)(realtime - pingcache[i].senttime);
 726                         pingtime = bound(0, pingtime, 9999);
 727                         memset(&hostcache[n], 0, sizeof(hostcache[n]));
 728                         // store the data the engine cares about (address and ping)
 729                         strcpy(hostcache[n].cname, cname);
 730                         hostcache[n].ping = pingtime;
 731                         // build description strings for the things users care about
 732                         snprintf(hostcache[n].line1, sizeof(hostcache[n].line1), "%5d%c%3u/%3u %-65.65s", (int)pingtime, c != NET_PROTOCOL_VERSION ? '*' : ' ', users, maxusers, name);
 733                         snprintf(hostcache[n].line2, sizeof(hostcache[n].line2), "%-21.21s %-19.19s %-17.17s %-20.20s", cname, game, mod, map);
 734                         // if ping is especially high, display it as such
 735                         if (pingtime >= 300)
 736                         {
 737                                 // orange numbers (lower block)
 738                                 for (i = 0;i < 5;i++)
 739                                         if (hostcache[n].line1[i] != ' ')
 740                                                 hostcache[n].line1[i] += 128;
 741                         }
 742                         else if (pingtime >= 200)
 743                         {
 744                                 // yellow numbers (in upper block)
 745                                 for (i = 0;i < 5;i++)
 746                                         if (hostcache[n].line1[i] != ' ')
 747                                                 hostcache[n].line1[i] -= 30;
 748                         }
 749                         // if not in the slist menu we should print the server to console
 750                         if (m_state != m_slist)
 751                                 Con_Printf("%s\n%s\n", hostcache[n].line1, hostcache[n].line2);
 752                         // and finally, re-sort the list
 753                         for (i = 0;i < hostCacheCount;i++)
 754                         {
 755                                 for (j = i + 1;j < hostCacheCount;j++)
 756                                 {
 757                                         //if (strcmp(hostcache[j].name, hostcache[i].name) < 0)
 758                                         if (hostcache[i].ping > hostcache[j].ping)
 759                                         {
 760                                                 memcpy(&temp, &hostcache[j], sizeof(hostcache_t));
 761                                                 memcpy(&hostcache[j], &hostcache[i], sizeof(hostcache_t));
 762                                                 memcpy(&hostcache[i], &temp, sizeof(hostcache_t));
 763                                         }
 764                                 }
 765                         }
 766                         return true;
 767                 }
 768                 if (!strncmp(string, "getserversResponse\\", 19) && hostCacheCount < HOSTCACHESIZE)
 769                 {
 770                         int i, best;
 771                         double besttime;
 772                         // Extract the IP addresses
 773                         data += 18;
 774                         length -= 18;
 775                         while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
 776                         {
 777                                 sprintf(ipstring, "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], (data[5] << 8) | data[6]);
 778                                 if (developer.integer)
 779                                         Con_Printf("Requesting info from server %s\n", ipstring);
 780                                 LHNETADDRESS_FromString(&svaddress, ipstring, 0);
 781                                 NetConn_WriteString(mysocket, "\377\377\377\377getinfo", &svaddress);
 782                                 // replace oldest or matching entry in ping cache
 783                                 // we scan this later when getting a reply to see how long it took
 784                                 besttime = realtime;
 785                                 best = 0;
 786                                 for (i = 0;i < HOSTCACHESIZE;i++)
 787                                 {
 788                                         if (!LHNETADDRESS_Compare(&svaddress, &pingcache[i].peeraddress))
 789                                         {
 790                                                 best = i;
 791                                                 break;
 792                                         }
 793                                         if (besttime > pingcache[i].senttime)
 794                                         {
 795                                                 besttime = pingcache[i].senttime;
 796                                                 best = i;
 797                                                 // if ping cache isn't full yet we can skip out early
 798                                                 if (!besttime)
 799                                                         break;
 800                                         }
 801                                 }
 802                                 pingcache[best].peeraddress = svaddress;
 803                                 pingcache[best].senttime = realtime;
 804                                 // move on to next address in packet
 805                                 data += 7;
 806                                 length -= 7;
 807                         }
 808                         return true;
 809                 }
 810                 /*
 811                 if (!strncmp(string, "ping", 4))
 812                 {
 813                         if (developer.integer)
 814                                 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
 815                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
 816                         return true;
 817                 }
 818                 if (!strncmp(string, "ack", 3))
 819                         return true;
 820                 */
 821                 // we may not have liked the packet, but it was a command packet, so
 822                 // we're done processing this packet now
 823                 return true;
 824         }
 825         // netquake control packets, supported for compatibility only
 826         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
 827         {
 828                 c = data[4];
 829                 data += 5;
 830                 length -= 5;
 831                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 832                 switch (c)
 833                 {
 834                 case CCREP_ACCEPT:
 835                         if (developer.integer)
 836                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
 837                         if (cls.connect_trying)
 838                         {
 839                                 lhnetaddress_t clientportaddress;
 840                                 clientportaddress = *peeraddress;
 841                                 if (length >= 4)
 842                                 {
 843                                         unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
 844                                         data += 4;
 845                                         length -= 4;
 846                                         LHNETADDRESS_SetPort(&clientportaddress, port);
 847                                 }
 848                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress);
 849                         }
 850                         break;
 851                 case CCREP_REJECT:
 852                         if (developer.integer)
 853                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
 854                         Con_Printf("%s\n", data);
 855                         strncpy(m_return_reason, data, sizeof(m_return_reason) - 1);
 856                         break;
 857 #if 0
 858                 case CCREP_SERVER_INFO:
 859                         if (developer.integer)
 860                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
 861                         if (cls.state != ca_dedicated)
 862                         {
 863                                 // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address
 864                                 // string we just ignore it and keep the real address
 865                                 MSG_ReadString();
 866                                 // hostcache only uses text addresses
 867                                 cname = UDP_AddrToString(readaddr);
 868                                 // search the cache for this server
 869                                 for (n = 0; n < hostCacheCount; n++)
 870                                         if (!strcmp(cname, hostcache[n].cname))
 871                                                 break;
 872                                 // add it
 873                                 if (n == hostCacheCount && hostCacheCount < HOSTCACHESIZE)
 874                                 {
 875                                         hostCacheCount++;
 876                                         memset(&hostcache[n], 0, sizeof(hostcache[n]));
 877                                         strcpy(hostcache[n].name, MSG_ReadString());
 878                                         strcpy(hostcache[n].map, MSG_ReadString());
 879                                         hostcache[n].users = MSG_ReadByte();
 880                                         hostcache[n].maxusers = MSG_ReadByte();
 881                                         c = MSG_ReadByte();
 882                                         if (c != NET_PROTOCOL_VERSION)
 883                                         {
 884                                                 strncpy(hostcache[n].cname, hostcache[n].name, sizeof(hostcache[n].cname) - 1);
 885                                                 hostcache[n].cname[sizeof(hostcache[n].cname) - 1] = 0;
 886                                                 strcpy(hostcache[n].name, "*");
 887                                                 strncat(hostcache[n].name, hostcache[n].cname, sizeof(hostcache[n].name) - 1);
 888                                                 hostcache[n].name[sizeof(hostcache[n].name) - 1] = 0;
 889                                         }
 890                                         strcpy(hostcache[n].cname, cname);
 891                                 }
 892                         }
 893                         break;
 894                 case CCREP_PLAYER_INFO:
 895                         // we got a CCREP_PLAYER_INFO??
 896                         //if (developer.integer)
 897                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
 898                         break;
 899                 case CCREP_RULE_INFO:
 900                         // we got a CCREP_RULE_INFO??
 901                         //if (developer.integer)
 902                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
 903                         break;
 904 #endif
 905                 default:
 906                         break;
 907                 }
 908                 // we may not have liked the packet, but it was a valid control
 909                 // packet, so we're done processing this packet now
 910                 return true;
 911         }
 912         ret = 0;
 913         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)
 914                 CL_ParseServerMessage();
 915         return ret;
 916 }
 917
 918 void NetConn_ClientFrame(void)
 919 {
 920         int i, length;
 921         lhnetaddress_t peeraddress;
 922         netconn_t *conn;
 923         NetConn_UpdateServerStuff();
 924         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
 925         {
 926                 if (cls.connect_remainingtries == 0)
 927                 {
 928                         cls.connect_trying = false;
 929                         Host_Error("Connect failed\n");
 930                         return;
 931                 }
 932                 if (cls.connect_nextsendtime)
 933                         Con_Printf("Still trying...\n");
 934                 else
 935                         Con_Printf("Trying...\n");
 936                 cls.connect_nextsendtime = realtime + 1;
 937                 cls.connect_remainingtries--;
 938                 // try challenge first (newer server)
 939                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
 940                 // then try netquake as a fallback (old server, or netquake)
 941                 SZ_Clear(&net_message);
 942                 // save space for the header, filled in later
 943                 MSG_WriteLong(&net_message, 0);
 944                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
 945                 MSG_WriteString(&net_message, "QUAKE");
 946                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
 947                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 948                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
 949                 SZ_Clear(&net_message);
 950         }
 951         for (i = 0;i < cl_numsockets;i++)
 952                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
 953                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
 954         if (cls.netcon && realtime > cls.netcon->timeout)
 955         {
 956                 Con_Printf("Connection timed out\n");
 957                 CL_Disconnect();
 958         }
 959         for (conn = netconn_list;conn;conn = conn->next)
 960                 NetConn_ReSendMessage(conn);
 961 }
 962
 963 #define MAX_CHALLENGES 128
 964 struct
 965 {
 966         lhnetaddress_t address;
 967         double time;
 968         char string[12];
 969 }
 970 challenge[MAX_CHALLENGES];
 971
 972 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
 973 {
 974         int i;
 975         char c;
 976         for (i = 0;i < bufferlength - 1;i++)
 977         {
 978                 do
 979                 {
 980                         c = rand () % (127 - 33) + 33;
 981                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
 982                 buffer[i] = c;
 983         }
 984         buffer[i] = 0;
 985 }
 986
 987 extern void SV_ConnectClient(int clientnum, netconn_t *netconnection);
 988 int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
 989 {
 990         int i, n, ret, clientnum, responselength, best, clientcount;
 991         double besttime;
 992         client_t *client;
 993         netconn_t *conn;
 994         char *s, *string, response[512], addressstring2[128], stringbuf[16384];
 995
 996         if (sv.active)
 997         {
 998                 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
 999                 {
1000                         // received a command string - strip off the packaging and put it
1001                         // into our string buffer with NULL termination
1002                         data += 4;
1003                         length -= 4;
1004                         length = min(length, (int)sizeof(stringbuf) - 1);
1005                         memcpy(stringbuf, data, length);
1006                         stringbuf[length] = 0;
1007                         string = stringbuf;
1008
1009                         if (developer.integer)
1010                         {
1011                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1012                                 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1013                                 Com_HexDumpToConsole(data, length);
1014                         }
1015
1016                         if (length >= 12 && !memcmp(string, "getchallenge", 12))
1017                         {
1018                                 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1019                                 {
1020                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1021                                                 break;
1022                                         if (besttime > challenge[i].time)
1023                                                 besttime = challenge[best = i].time;
1024                                 }
1025                                 // if we did not find an exact match, choose the oldest and
1026                                 // update address and string
1027                                 if (i == MAX_CHALLENGES)
1028                                 {
1029                                         i = best;
1030                                         challenge[i].address = *peeraddress;
1031                                         NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1032                                 }
1033                                 challenge[i].time = realtime;
1034                                 // send the challenge
1035                                 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1036                                 return true;
1037                         }
1038                         if (length > 8 && !memcmp(string, "connect\\", 8))
1039                         {
1040                                 string += 7;
1041                                 length -= 7;
1042                                 if ((s = SearchInfostring(string, "challenge")))
1043                                 {
1044                                         // validate the challenge
1045                                         for (i = 0;i < MAX_CHALLENGES;i++)
1046                                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1047                                                         break;
1048                                         if (i < MAX_CHALLENGES)
1049                                         {
1050                                                 // check engine protocol
1051                                                 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1052                                                 {
1053                                                         if (developer.integer)
1054                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1055                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1056                                                 }
1057                                                 else
1058                                                 {
1059                                                         // see if this is a duplicate connection request
1060                                                         for (clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1061                                                                 if ((client = svs.connectedclients[clientnum]) && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1062                                                                         break;
1063                                                         if (clientnum < MAX_SCOREBOARD)
1064                                                         {
1065                                                                 // duplicate connection request
1066                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1067                                                                 {
1068                                                                         // client is still trying to connect,
1069                                                                         // so we send a duplicate reply
1070                                                                         if (developer.integer)
1071                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1072                                                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1073                                                                 }
1074                                                                 // only kick if old connection seems dead
1075                                                                 if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1076                                                                 {
1077                                                                         // kick off connection and await retry
1078                                                                         client->deadsocket = true;
1079                                                                 }
1080                                                         }
1081                                                         else
1082                                                         {
1083                                                                 // this is a new client, find a slot
1084                                                                 for (clientcount = 0, clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1085                                                                         if (svs.connectedclients[clientnum])
1086                                                                                 clientcount++;
1087                                                                 for (clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1088                                                                         if (!svs.connectedclients[clientnum])
1089                                                                                 break;
1090                                                                 if (clientcount < max(1, sv_maxplayers.integer) && clientnum < MAX_SCOREBOARD)
1091                                                                 {
1092                                                                         // allocate and prepare the client struct
1093                                                                         if ((client = Mem_Alloc(sv_clients_mempool, sizeof(client_t))))
1094                                                                         {
1095                                                                                 if ((client->entitydatabase4 = EntityFrame4_AllocDatabase(sv_clients_mempool)))
1096                                                                                 {
1097                                                                                         if ((conn = NetConn_Open(mysocket, peeraddress)))
1098                                                                                         {
1099                                                                                                 // allocated connection
1100                                                                                                 LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true);
1101                                                                                                 if (developer.integer)
1102                                                                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1103                                                                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1104                                                                                                 // now set up the client struct
1105                                                                                                 svs.connectedclients[clientnum] = client;
1106                                                                                                 SV_ConnectClient(clientnum, conn);
1107                                                                                                 NetConn_Heartbeat(1);
1108                                                                                         }
1109                                                                                         else
1110                                                                                         {
1111                                                                                                 EntityFrame4_FreeDatabase(client->entitydatabase4);
1112                                                                                                 Mem_Free(client);
1113                                                                                         }
1114                                                                                 }
1115                                                                                 else
1116                                                                                         Mem_Free(client);
1117                                                                         }
1118                                                                 }
1119                                                                 else
1120                                                                 {
1121                                                                         // server is full
1122                                                                         if (developer.integer)
1123                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1124                                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1125                                                                 }
1126                                                         }
1127                                                 }
1128                                         }
1129                                 }
1130                                 return true;
1131                         }
1132                         if (length >= 7 && !memcmp(string, "getinfo", 7))
1133                         {
1134                                 const char *challenge = NULL;
1135                                 // If there was a challenge in the getinfo message
1136                                 if (length > 8 && string[7] == ' ')
1137                                         challenge = string + 8;
1138                                 for (i = 0, n = 0;i < MAX_SCOREBOARD;i++)
1139                                         if (svs.connectedclients[i])
1140                                                 n++;
1141                                 responselength = snprintf(response, sizeof(response), "\377\377\377\377infoResponse\x0A"
1142                                                         "\\gamename\\%s\\modname\\%s\\sv_maxclients\\%d"
1143                                                         "\\clients\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d%s%s",
1144                                                         gamename, com_modname, min(sv_maxplayers.integer, MAX_SCOREBOARD), n,
1145                                                         sv.name, hostname.string, NET_PROTOCOL_VERSION, challenge ? "\\challenge\\" : "", challenge ? challenge : "");
1146                                 // does it fit in the buffer?
1147                                 if (responselength < (int)sizeof(response))
1148                                 {
1149                                         if (developer.integer)
1150                                                 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1151                                         NetConn_WriteString(mysocket, response, peeraddress);
1152                                 }
1153                                 return true;
1154                         }
1155                         /*
1156                         if (!strncmp(string, "ping", 4))
1157                         {
1158                                 if (developer.integer)
1159                                         Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1160                                 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1161                                 return true;
1162                         }
1163                         if (!strncmp(string, "ack", 3))
1164                                 return true;
1165                         */
1166                         // we may not have liked the packet, but it was a command packet, so
1167                         // we're done processing this packet now
1168                         return true;
1169                 }
1170                 // LordHavoc: disabled netquake control packet support in server
1171 #if 0
1172                 {
1173                         int c, control;
1174                         // netquake control packets, supported for compatibility only
1175                         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1176                         {
1177                                 c = data[4];
1178                                 data += 5;
1179                                 length -= 5;
1180                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1181                                 switch (c)
1182                                 {
1183                                 case CCREQ_CONNECT:
1184                                         //if (developer.integer)
1185                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
1186                                         if (length >= (int)strlen("QUAKE") + 1 + 1)
1187                                         {
1188                                                 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
1189                                                 {
1190                                                         if (developer.integer)
1191                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
1192                                                         SZ_Clear(&net_message);
1193                                                         // save space for the header, filled in later
1194                                                         MSG_WriteLong(&net_message, 0);
1195                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1196                                                         MSG_WriteString(&net_message, "Incompatible version.\n");
1197                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1198                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1199                                                         SZ_Clear(&net_message);
1200                                                 }
1201                                                 else
1202                                                 {
1203                                                         // see if this is a duplicate connection request
1204                                                         for (clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1205                                                                 if ((client = svs.connectedclients[clientnum]) && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1206                                                                         break;
1207                                                         if (clientnum < MAX_SCOREBOARD)
1208                                                         {
1209                                                                 // duplicate connection request
1210                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1211                                                                 {
1212                                                                         // client is still trying to connect,
1213                                                                         // so we send a duplicate reply
1214                                                                         if (developer.integer)
1215                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
1216                                                                         SZ_Clear(&net_message);
1217                                                                         // save space for the header, filled in later
1218                                                                         MSG_WriteLong(&net_message, 0);
1219                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1220                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
1221                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1222                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1223                                                                         SZ_Clear(&net_message);
1224                                                                 }
1225                                                                 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1226                                                                 {
1227                                                                         // the old client hasn't sent us anything
1228                                                                         // in quite a while, so kick off and let
1229                                                                         // the retry take care of it...
1230                                                                         client->deadsocket = true;
1231                                                                 }
1232                                                         }
1233                                                         else
1234                                                         {
1235                                                                 // this is a new client, find a slot
1236                                                                 for (clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1237                                                                         if (!(client = svs.connectedclients[clientnum]))
1238                                                                                 break;
1239                                                                 // WARNING: this is broken code
1240                                                                 if (clientnum < MAX_SCOREBOARD && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
1241                                                                 {
1242                                                                         // connect to the client
1243                                                                         // everything is allocated, just fill in the details
1244                                                                         strcpy(conn->address, addressstring2);
1245                                                                         if (developer.integer)
1246                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
1247                                                                         // send back the info about the server connection
1248                                                                         SZ_Clear(&net_message);
1249                                                                         // save space for the header, filled in later
1250                                                                         MSG_WriteLong(&net_message, 0);
1251                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1252                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
1253                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1254                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1255                                                                         SZ_Clear(&net_message);
1256                                                                         // now set up the client struct
1257                                                                         SV_ConnectClient(clientnum, conn);
1258                                                                         NetConn_Heartbeat(1);
1259                                                                 }
1260                                                                 else
1261                                                                 {
1262                                                                         //if (developer.integer)
1263                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
1264                                                                         // no room; try to let player know
1265                                                                         SZ_Clear(&net_message);
1266                                                                         // save space for the header, filled in later
1267                                                                         MSG_WriteLong(&net_message, 0);
1268                                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1269                                                                         MSG_WriteString(&net_message, "Server is full.\n");
1270                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1271                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1272                                                                         SZ_Clear(&net_message);
1273                                                                 }
1274                                                         }
1275                                                 }
1276                                         }
1277                                         break;
1278 #if 0
1279                                 case CCREQ_SERVER_INFO:
1280                                         if (developer.integer)
1281                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
1282                                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
1283                                         {
1284                                                 if (developer.integer)
1285                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
1286                                                 SZ_Clear(&net_message);
1287                                                 // save space for the header, filled in later
1288                                                 MSG_WriteLong(&net_message, 0);
1289                                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
1290                                                 UDP_GetSocketAddr(UDP_acceptSock, &newaddr);
1291                                                 MSG_WriteString(&net_message, UDP_AddrToString(&newaddr));
1292                                                 MSG_WriteString(&net_message, hostname.string);
1293                                                 MSG_WriteString(&net_message, sv.name);
1294                                                 MSG_WriteByte(&net_message, net_activeconnections);
1295                                                 MSG_WriteByte(&net_message, min(sv_maxplayers.integer, MAX_SCOREBOARD));
1296                                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1297                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1298                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1299                                                 SZ_Clear(&net_message);
1300                                         }
1301                                         break;
1302                                 case CCREQ_PLAYER_INFO:
1303                                         if (developer.integer)
1304                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
1305                                         if (sv.active)
1306                                         {
1307                                                 int playerNumber, activeNumber, clientNumber;
1308                                                 client_t *client;
1309
1310                                                 playerNumber = MSG_ReadByte();
1311                                                 activeNumber = -1;
1312                                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
1313                                                         if (client->active && ++activeNumber == playerNumber)
1314                                                                 break;
1315                                                 if (clientNumber != svs.maxclients)
1316                                                 {
1317                                                         SZ_Clear(&net_message);
1318                                                         // save space for the header, filled in later
1319                                                         MSG_WriteLong(&net_message, 0);
1320                                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
1321                                                         MSG_WriteByte(&net_message, playerNumber);
1322                                                         MSG_WriteString(&net_message, client->name);
1323                                                         MSG_WriteLong(&net_message, client->colors);
1324                                                         MSG_WriteLong(&net_message, (int)client->edict->v->frags);
1325                                                         MSG_WriteLong(&net_message, (int)(realtime - client->netconnection->connecttime));
1326                                                         MSG_WriteString(&net_message, client->netconnection->address);
1327                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1328                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1329                                                         SZ_Clear(&net_message);
1330                                                 }
1331                                         }
1332                                         break;
1333                                 case CCREQ_RULE_INFO:
1334                                         if (developer.integer)
1335                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
1336                                         if (sv.active)
1337                                         {
1338                                                 char *prevCvarName;
1339                                                 cvar_t *var;
1340
1341                                                 // find the search start location
1342                                                 prevCvarName = MSG_ReadString();
1343                                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
1344
1345                                                 // send the response
1346                                                 SZ_Clear(&net_message);
1347                                                 // save space for the header, filled in later
1348                                                 MSG_WriteLong(&net_message, 0);
1349                                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
1350                                                 if (var)
1351                                                 {
1352                                                         MSG_WriteString(&net_message, var->name);
1353                                                         MSG_WriteString(&net_message, var->string);
1354                                                 }
1355                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1356                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1357                                                 SZ_Clear(&net_message);
1358                                         }
1359                                         break;
1360 #endif
1361                                 default:
1362                                         break;
1363                                 }
1364                                 // we may not have liked the packet, but it was a valid control
1365                                 // packet, so we're done processing this packet now
1366                                 return true;
1367                         }
1368                 }
1369 #endif
1370                 for (i = 0;i < MAX_SCOREBOARD;i++)
1371                 {
1372                         if ((host_client = svs.connectedclients[i]))
1373                         {
1374                                 if (host_client->netconnection)
1375                                 {
1376                                         if (host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1377                                         {
1378                                                 sv_player = host_client->edict;
1379                                                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length)) == 2)
1380                                                         SV_ReadClientMessage();
1381                                                 return ret;
1382                                         }
1383                                 }
1384                                 else
1385                                 {
1386                                         Con_Printf("Removing client with no netconnection!\n");
1387                                         SV_DropClient(true);
1388                                 }
1389                         }
1390                 }
1391         }
1392         return 0;
1393 }
1394
1395 void NetConn_ServerFrame(void)
1396 {
1397         int i, length;
1398         lhnetaddress_t peeraddress;
1399         netconn_t *conn;
1400         NetConn_UpdateServerStuff();
1401         for (i = 0;i < sv_numsockets;i++)
1402                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1403                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
1404         for (i = 0;i < MAX_SCOREBOARD;i++)
1405         {
1406                 if ((host_client = svs.connectedclients[i]) && realtime > host_client->netconnection->timeout)
1407                 {
1408                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
1409                         sv_player = host_client->edict;
1410                         SV_DropClient(false);
1411                 }
1412         }
1413         for (conn = netconn_list;conn;conn = conn->next)
1414                 NetConn_ReSendMessage(conn);
1415 }
1416
1417 void NetConn_QueryMasters(void)
1418 {
1419         int i;
1420         int masternum;
1421         lhnetaddress_t masteraddress;
1422         char request[256];
1423
1424         if (hostCacheCount >= HOSTCACHESIZE)
1425                 return;
1426
1427         for (i = 0;i < cl_numsockets;i++)
1428         {
1429                 if (cl_sockets[i])
1430                 {
1431 #if 0
1432                         // search LAN
1433 #if 1
1434                         UDP_Broadcast(UDP_controlSock, "\377\377\377\377getinfo", 11);
1435 #else
1436                         SZ_Clear(&net_message);
1437                         // save space for the header, filled in later
1438                         MSG_WriteLong(&net_message, 0);
1439                         MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
1440                         MSG_WriteString(&net_message, "QUAKE");
1441                         MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1442                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1443                         UDP_Broadcast(UDP_controlSock, net_message.data, net_message.cursize);
1444                         SZ_Clear(&net_message);
1445 #endif
1446 #endif
1447
1448                         // build the getservers
1449                         snprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
1450
1451                         // search internet
1452                         for (masternum = 0;sv_masters[masternum].name;masternum++)
1453                                 if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
1454                                         NetConn_WriteString(cl_sockets[i], request, &masteraddress);
1455                 }
1456         }
1457 }
1458
1459 void NetConn_Heartbeat(int priority)
1460 {
1461         lhnetaddress_t masteraddress;
1462         int masternum;
1463         lhnetsocket_t *mysocket;
1464
1465         // if it's a state change (client connected), limit next heartbeat to no
1466         // more than 30 sec in the future
1467         if (priority == 1 && nextheartbeattime > realtime + 30.0)
1468                 nextheartbeattime = realtime + 30.0;
1469
1470         // limit heartbeatperiod to 30 to 270 second range,
1471         // lower limit is to avoid abusing master servers with excess traffic,
1472         // upper limit is to avoid timing out on the master server (which uses
1473         // 300 sec timeout)
1474         if (sv_heartbeatperiod.value < 30)
1475                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
1476         if (sv_heartbeatperiod.value > 270)
1477                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
1478
1479         // make advertising optional and don't advertise singleplayer games, and
1480         // only send a heartbeat as often as the admin wants
1481         if (sv.active && sv_public.integer && (!cl.islocalgame || sv_maxplayers.integer >= 2) && (priority > 1 || realtime > nextheartbeattime))
1482         {
1483                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
1484                 for (masternum = 0;sv_masters[masternum].name;masternum++)
1485                         if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
1486                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
1487         }
1488 }
1489
1490 int NetConn_SendToAll(sizebuf_t *data, double blocktime)
1491 {
1492         int i, count = 0;
1493         qbyte sent[MAX_SCOREBOARD];
1494
1495         memset(sent, 0, sizeof(sent));
1496
1497         // simultaneously wait for the first CanSendMessage and send the message,
1498         // then wait for a second CanSendMessage (verifying it was received), or
1499         // the client drops and is no longer counted
1500         // the loop aborts when either it runs out of clients to send to, or a
1501         // timeout expires
1502         blocktime += Sys_DoubleTime();
1503         do
1504         {
1505                 count = 0;
1506                 NetConn_ClientFrame();
1507                 NetConn_ServerFrame();
1508                 for (i = 0;i < MAX_SCOREBOARD;i++)
1509                 {
1510                         if ((host_client = svs.connectedclients[i]))
1511                         {
1512                                 if (NetConn_CanSendMessage(host_client->netconnection))
1513                                 {
1514                                         if (!sent[i])
1515                                                 NetConn_SendReliableMessage(host_client->netconnection, data);
1516                                         sent[i] = true;
1517                                 }
1518                                 if (!NetConn_CanSendMessage(host_client->netconnection))
1519                                         count++;
1520                         }
1521                 }
1522         }
1523         while (count && Sys_DoubleTime() < blocktime);
1524         return count;
1525 }
1526
1527 static void Net_Heartbeat_f(void)
1528 {
1529         NetConn_Heartbeat(2);
1530 }
1531
1532 void PrintStats(netconn_t *conn)
1533 {
1534         Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, conn->canSend, conn->sendSequence, conn->receiveSequence);
1535 }
1536
1537 void Net_Stats_f(void)
1538 {
1539         netconn_t *conn;
1540         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
1541         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
1542         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
1543         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
1544         Con_Printf("packetsSent                = %i\n", packetsSent);
1545         Con_Printf("packetsReSent              = %i\n", packetsReSent);
1546         Con_Printf("packetsReceived            = %i\n", packetsReceived);
1547         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
1548         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
1549         Con_Printf("connections                =\n");
1550         for (conn = netconn_list;conn;conn = conn->next)
1551                 PrintStats(conn);
1552 }
1553
1554 void Net_Slist_f(void)
1555 {
1556         hostCacheCount = 0;
1557         memset(&pingcache, 0, sizeof(pingcache));
1558         if (m_state != m_slist)
1559                 Con_Printf("Sending requests to master servers\n");
1560         NetConn_QueryMasters();
1561         if (m_state != m_slist)
1562                 Con_Printf("Listening for replies...\n");
1563 }
1564
1565 void NetConn_Init(void)
1566 {
1567         int i;
1568         lhnetaddress_t tempaddress;
1569         netconn_mempool = Mem_AllocPool("Networking");
1570         Cmd_AddCommand("net_stats", Net_Stats_f);
1571         Cmd_AddCommand("net_slist", Net_Slist_f);
1572         Cmd_AddCommand("heartbeat", Net_Heartbeat_f);
1573         Cvar_RegisterVariable(&net_messagetimeout);
1574         Cvar_RegisterVariable(&net_messagerejointimeout);
1575         Cvar_RegisterVariable(&net_connecttimeout);
1576         Cvar_RegisterVariable(&cl_fakelocalping_min);
1577         Cvar_RegisterVariable(&cl_fakelocalping_max);
1578         Cvar_RegisterVariable(&cl_fakepacketloss_receive);
1579         Cvar_RegisterVariable(&cl_fakepacketloss_send);
1580         Cvar_RegisterVariable(&sv_fakepacketloss_receive);
1581         Cvar_RegisterVariable(&sv_fakepacketloss_send);
1582         Cvar_RegisterVariable(&hostname);
1583         Cvar_RegisterVariable(&developer_networking);
1584         Cvar_RegisterVariable(&cl_netport);
1585         Cvar_RegisterVariable(&cl_netaddress);
1586         Cvar_RegisterVariable(&cl_netaddress_ipv6);
1587         Cvar_RegisterVariable(&sv_netport);
1588         Cvar_RegisterVariable(&sv_netaddress);
1589         Cvar_RegisterVariable(&sv_netaddress_ipv6);
1590         Cvar_RegisterVariable(&sv_public);
1591         Cvar_RegisterVariable(&sv_heartbeatperiod);
1592         for (i = 0;sv_masters[i].name;i++)
1593                 Cvar_RegisterVariable(&sv_masters[i]);
1594         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
1595         {
1596                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
1597                 {
1598                         Con_Printf("-ip option used, setting cl_netaddress and sv_netaddress to address \"%s\"\n");
1599                         Cvar_SetQuick(&cl_netaddress, com_argv[i + 1]);
1600                         Cvar_SetQuick(&sv_netaddress, com_argv[i + 1]);
1601                 }
1602                 else
1603                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
1604         }
1605         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
1606         {
1607                 i = atoi(com_argv[i + 1]);
1608                 if (i >= 0 && i < 65536)
1609                 {
1610                         Con_Printf("-port option used, setting port cvar to %i\n", i);
1611                         Cvar_SetValueQuick(&sv_netport, i);
1612                 }
1613                 else
1614                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
1615         }
1616         cl_numsockets = 0;
1617         sv_numsockets = 0;
1618         memset(&pingcache, 0, sizeof(pingcache));
1619         SZ_Alloc(&net_message, NET_MAXMESSAGE, "net_message");
1620         LHNET_Init();
1621 }
1622
1623 void NetConn_Shutdown(void)
1624 {
1625         NetConn_CloseClientPorts();
1626         NetConn_CloseServerPorts();
1627         LHNET_Shutdown();
1628 }
1629