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", "ghdigital.com"},
  38         {0, "sv_masterextra2", "dpmaster.deathmask.net"},
  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_netlocalping_min = {0, "cl_netlocalping_min","0"};
  53 cvar_t cl_netlocalping_max = {0, "cl_netlocalping_max","0"};
  54 static cvar_t cl_netpacketloss_receive = {0, "cl_netpacketloss_receive","0"};
  55 static cvar_t cl_netpacketloss_send = {0, "cl_netpacketloss_send","0"};
  56 static cvar_t sv_netpacketloss_receive = {0, "sv_netpacketloss_receive","0"};
  57 static cvar_t sv_netpacketloss_send = {0, "sv_netpacketloss_send","0"};
  58
  59
  60 /* statistic counters */
  61 static int packetsSent = 0;
  62 static int packetsReSent = 0;
  63 static int packetsReceived = 0;
  64 static int receivedDuplicateCount = 0;
  65 static int droppedDatagrams = 0;
  66
  67 static int unreliableMessagesSent = 0;
  68 static int unreliableMessagesReceived = 0;
  69 static int reliableMessagesSent = 0;
  70 static int reliableMessagesReceived = 0;
  71
  72 double masterquerytime = -1000;
  73 int masterquerycount = 0;
  74 int masterreplycount = 0;
  75 int serverquerycount = 0;
  76 int serverreplycount = 0;
  77
  78 int hostCacheCount = 0;
  79 hostcache_t hostcache[HOSTCACHESIZE];
  80
  81 static qbyte sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
  82 static qbyte readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
  83
  84 int cl_numsockets;
  85 lhnetsocket_t *cl_sockets[16];
  86 int sv_numsockets;
  87 lhnetsocket_t *sv_sockets[16];
  88
  89 netconn_t *netconn_list = NULL;
  90 mempool_t *netconn_mempool = NULL;
  91
  92 cvar_t cl_netport = {0, "cl_port", "0"};
  93 cvar_t sv_netport = {0, "port", "26000"};
  94 cvar_t net_address = {0, "net_address", "0.0.0.0"};
  95 //cvar_t net_netaddress_ipv6 = {0, "net_address_ipv6", "[0:0:0:0:0:0:0:0]"};
  96
  97 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
  98 {
  99         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 100         int i;
 101         if (cl_netpacketloss_receive.integer)
 102                 for (i = 0;i < cl_numsockets;i++)
 103                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_receive.integer)
 104                                 return 0;
 105         if (sv_netpacketloss_receive.integer)
 106                 for (i = 0;i < cl_numsockets;i++)
 107                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_netpacketloss_receive.integer)
 108                                 return 0;
 109         if (developer_networking.integer && length != 0)
 110         {
 111                 char addressstring[128], addressstring2[128];
 112                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 113                 if (length > 0)
 114                 {
 115                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 116                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
 117                         Com_HexDumpToConsole(data, length);
 118                 }
 119                 else
 120                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
 121         }
 122         return length;
 123 }
 124
 125 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 126 {
 127         int ret;
 128         int i;
 129         if (cl_netpacketloss_send.integer)
 130                 for (i = 0;i < cl_numsockets;i++)
 131                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_send.integer)
 132                                 return length;
 133         if (sv_netpacketloss_send.integer)
 134                 for (i = 0;i < cl_numsockets;i++)
 135                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_netpacketloss_send.integer)
 136                                 return length;
 137         ret = LHNET_Write(mysocket, data, length, peeraddress);
 138         if (developer_networking.integer)
 139         {
 140                 char addressstring[128], addressstring2[128];
 141                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 142                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 143                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 144                 Com_HexDumpToConsole(data, length);
 145         }
 146         return ret;
 147 }
 148
 149 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 150 {
 151         // note this does not include the trailing NULL because we add that in the parser
 152         return NetConn_Write(mysocket, string, strlen(string), peeraddress);
 153 }
 154
 155 int NetConn_SendReliableMessage(netconn_t *conn, sizebuf_t *data)
 156 {
 157         unsigned int packetLen;
 158         unsigned int dataLen;
 159         unsigned int eom;
 160         unsigned int *header;
 161
 162 //#ifdef DEBUG
 163         if (data->cursize == 0)
 164                 Sys_Error("Datagram_SendMessage: zero length message\n");
 165
 166         if (data->cursize > (int)sizeof(conn->sendMessage))
 167                 Sys_Error("Datagram_SendMessage: message too big (%u > %u)\n", data->cursize, sizeof(conn->sendMessage));
 168
 169         if (conn->canSend == false)
 170                 Sys_Error("SendMessage: called with canSend == false\n");
 171 //#endif
 172
 173         memcpy(conn->sendMessage, data->data, data->cursize);
 174         conn->sendMessageLength = data->cursize;
 175
 176         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 177         {
 178                 dataLen = conn->sendMessageLength;
 179                 eom = NETFLAG_EOM;
 180         }
 181         else
 182         {
 183                 dataLen = MAX_PACKETFRAGMENT;
 184                 eom = 0;
 185         }
 186
 187         packetLen = NET_HEADERSIZE + dataLen;
 188
 189         header = (void *)sendbuffer;
 190         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 191         header[1] = BigLong(conn->sendSequence);
 192         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 193
 194         conn->sendSequence++;
 195         conn->canSend = false;
 196
 197         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 198                 return -1;
 199
 200         conn->lastSendTime = realtime;
 201         packetsSent++;
 202         reliableMessagesSent++;
 203         return 1;
 204 }
 205
 206 static void NetConn_SendMessageNext(netconn_t *conn)
 207 {
 208         unsigned int packetLen;
 209         unsigned int dataLen;
 210         unsigned int eom;
 211         unsigned int *header;
 212
 213         if (conn->sendMessageLength && !conn->canSend && conn->sendNext)
 214         {
 215                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 216                 {
 217                         dataLen = conn->sendMessageLength;
 218                         eom = NETFLAG_EOM;
 219                 }
 220                 else
 221                 {
 222                         dataLen = MAX_PACKETFRAGMENT;
 223                         eom = 0;
 224                 }
 225
 226                 packetLen = NET_HEADERSIZE + dataLen;
 227
 228                 header = (void *)sendbuffer;
 229                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 230                 header[1] = BigLong(conn->sendSequence);
 231                 memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 232
 233                 conn->sendSequence++;
 234                 conn->sendNext = false;
 235
 236                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 237                         return;
 238
 239                 conn->lastSendTime = realtime;
 240                 packetsSent++;
 241         }
 242 }
 243
 244 static void NetConn_ReSendMessage(netconn_t *conn)
 245 {
 246         unsigned int packetLen;
 247         unsigned int dataLen;
 248         unsigned int eom;
 249         unsigned int *header;
 250
 251         if (conn->sendMessageLength && !conn->canSend && (realtime - conn->lastSendTime) > 1.0)
 252         {
 253                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 254                 {
 255                         dataLen = conn->sendMessageLength;
 256                         eom = NETFLAG_EOM;
 257                 }
 258                 else
 259                 {
 260                         dataLen = MAX_PACKETFRAGMENT;
 261                         eom = 0;
 262                 }
 263
 264                 packetLen = NET_HEADERSIZE + dataLen;
 265
 266                 header = (void *)sendbuffer;
 267                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
 268                 header[1] = BigLong(conn->sendSequence - 1);
 269                 memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 270
 271                 conn->sendNext = false;
 272
 273                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 274                         return;
 275
 276                 conn->lastSendTime = realtime;
 277                 packetsReSent++;
 278         }
 279 }
 280
 281 qboolean NetConn_CanSendMessage(netconn_t *conn)
 282 {
 283         return conn->canSend;
 284 }
 285
 286 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data)
 287 {
 288         int packetLen;
 289         int *header;
 290
 291         packetLen = NET_HEADERSIZE + data->cursize;
 292
 293 //#ifdef DEBUG
 294         if (data->cursize == 0)
 295                 Sys_Error("Datagram_SendUnreliableMessage: zero length message\n");
 296
 297         if (packetLen > (int)sizeof(sendbuffer))
 298                 Sys_Error("Datagram_SendUnreliableMessage: message too big %u\n", data->cursize);
 299 //#endif
 300
 301         header = (void *)sendbuffer;
 302         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
 303         header[1] = BigLong(conn->unreliableSendSequence);
 304         memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
 305
 306         conn->unreliableSendSequence++;
 307
 308         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
 309                 return -1;
 310
 311         packetsSent++;
 312         unreliableMessagesSent++;
 313         return 1;
 314 }
 315
 316 void NetConn_CloseClientPorts(void)
 317 {
 318         for (;cl_numsockets > 0;cl_numsockets--)
 319                 if (cl_sockets[cl_numsockets - 1])
 320                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 321 }
 322
 323 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
 324 {
 325         lhnetaddress_t address;
 326         lhnetsocket_t *s;
 327         char addressstring2[1024];
 328         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 329         {
 330                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 331                 {
 332                         cl_sockets[cl_numsockets++] = s;
 333                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 334                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
 335                 }
 336                 else
 337                 {
 338                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 339                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 340                 }
 341         }
 342         else
 343                 Con_Printf("Client unable to parse address %s\n", addressstring);
 344 }
 345
 346 void NetConn_OpenClientPorts(void)
 347 {
 348         int port;
 349         NetConn_CloseClientPorts();
 350         port = bound(0, cl_netport.integer, 65535);
 351         if (cl_netport.integer != port)
 352                 Cvar_SetValueQuick(&cl_netport, port);
 353         Con_Printf("Client using port %i\n", port);
 354         NetConn_OpenClientPort("local:2", 0);
 355         NetConn_OpenClientPort(net_address.string, port);
 356         //NetConn_OpenClientPort(net_address_ipv6.string, port);
 357 }
 358
 359 void NetConn_CloseServerPorts(void)
 360 {
 361         for (;sv_numsockets > 0;sv_numsockets--)
 362                 if (sv_sockets[sv_numsockets - 1])
 363                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 364 }
 365
 366 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
 367 {
 368         lhnetaddress_t address;
 369         lhnetsocket_t *s;
 370         char addressstring2[1024];
 371         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
 372         {
 373                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 374                 {
 375                         sv_sockets[sv_numsockets++] = s;
 376                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 377                         Con_Printf("Server listening on address %s\n", addressstring2);
 378                 }
 379                 else
 380                 {
 381                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 382                         Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 383                 }
 384         }
 385         else
 386                 Con_Printf("Server unable to parse address %s\n", addressstring);
 387 }
 388
 389 void NetConn_OpenServerPorts(int opennetports)
 390 {
 391         int port;
 392         NetConn_CloseServerPorts();
 393         port = bound(0, sv_netport.integer, 65535);
 394         if (port == 0)
 395                 port = 26000;
 396         Con_Printf("Server using port %i\n", port);
 397         if (sv_netport.integer != port)
 398                 Cvar_SetValueQuick(&sv_netport, port);
 399         if (cls.state != ca_dedicated)
 400                 NetConn_OpenServerPort("local:1", 0);
 401         if (opennetports)
 402         {
 403                 NetConn_OpenServerPort(net_address.string, port);
 404                 //NetConn_OpenServerPort(net_address_ipv6.string, port);
 405         }
 406         if (sv_numsockets == 0)
 407                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!\n");
 408 }
 409
 410 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
 411 {
 412         int i, a = LHNETADDRESS_GetAddressType(address);
 413         for (i = 0;i < cl_numsockets;i++)
 414                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
 415                         return cl_sockets[i];
 416         return NULL;
 417 }
 418
 419 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
 420 {
 421         int i, a = LHNETADDRESS_GetAddressType(address);
 422         for (i = 0;i < sv_numsockets;i++)
 423                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
 424                         return sv_sockets[i];
 425         return NULL;
 426 }
 427
 428 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 429 {
 430         netconn_t *conn;
 431         conn = Mem_Alloc(netconn_mempool, sizeof(*conn));
 432         conn->mysocket = mysocket;
 433         conn->peeraddress = *peeraddress;
 434         // updated by receiving "rate" command from client
 435         conn->rate = NET_MINRATE;
 436         // no limits for local player
 437         if (LHNETADDRESS_GetAddressType(peeraddress) == LHNETADDRESSTYPE_LOOP)
 438                 conn->rate = 1000000000;
 439         conn->canSend = true;
 440         conn->connecttime = realtime;
 441         conn->lastMessageTime = realtime;
 442         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
 443         // reduce effectiveness of connection request floods
 444         conn->timeout = realtime + net_connecttimeout.value;
 445         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
 446         conn->next = netconn_list;
 447         netconn_list = conn;
 448         return conn;
 449 }
 450
 451 void NetConn_Close(netconn_t *conn)
 452 {
 453         netconn_t *c;
 454         // remove connection from list
 455         if (conn == netconn_list)
 456                 netconn_list = conn->next;
 457         else
 458         {
 459                 for (c = netconn_list;c;c = c->next)
 460                 {
 461                         if (c->next == conn)
 462                         {
 463                                 c->next = conn->next;
 464                                 break;
 465                         }
 466                 }
 467                 // not found in list, we'll avoid crashing here...
 468                 if (!c)
 469                         return;
 470         }
 471         // free connection
 472         Mem_Free(conn);
 473 }
 474
 475 static int clientport = -1;
 476 static int clientport2 = -1;
 477 static int hostport = -1;
 478 static void NetConn_UpdateServerStuff(void)
 479 {
 480         if (cls.state != ca_dedicated)
 481         {
 482                 if (clientport2 != cl_netport.integer)
 483                 {
 484                         clientport2 = cl_netport.integer;
 485                         if (cls.state == ca_connected)
 486                                 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
 487                 }
 488                 if (cls.state == ca_disconnected && clientport != clientport2)
 489                 {
 490                         clientport = clientport2;
 491                         NetConn_CloseClientPorts();
 492                 }
 493                 if (cl_numsockets == 0)
 494                         NetConn_OpenClientPorts();
 495         }
 496
 497         if (hostport != sv_netport.integer)
 498         {
 499                 hostport = sv_netport.integer;
 500                 if (sv.active)
 501                         Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
 502         }
 503 }
 504
 505 int NetConn_ReceivedMessage(netconn_t *conn, qbyte *data, int length)
 506 {
 507         unsigned int count;
 508         unsigned int flags;
 509         unsigned int sequence;
 510
 511         if (length >= 8)
 512         {
 513                 length = BigLong(((int *)data)[0]);
 514                 flags = length & ~NETFLAG_LENGTH_MASK;
 515                 length &= NETFLAG_LENGTH_MASK;
 516                 // control packets were already handled
 517                 if (!(flags & NETFLAG_CTL))
 518                 {
 519                         sequence = BigLong(((int *)data)[1]);
 520                         packetsReceived++;
 521                         data += 8;
 522                         length -= 8;
 523                         if (flags & NETFLAG_UNRELIABLE)
 524                         {
 525                                 if (sequence >= conn->unreliableReceiveSequence)
 526                                 {
 527                                         if (sequence > conn->unreliableReceiveSequence)
 528                                         {
 529                                                 count = sequence - conn->unreliableReceiveSequence;
 530                                                 droppedDatagrams += count;
 531                                                 Con_DPrintf("Dropped %u datagram(s)\n", count);
 532                                         }
 533                                         conn->unreliableReceiveSequence = sequence + 1;
 534                                         conn->lastMessageTime = realtime;
 535                                         conn->timeout = realtime + net_messagetimeout.value;
 536                                         unreliableMessagesReceived++;
 537                                         if (length > 0)
 538                                         {
 539                                                 SZ_Clear(&net_message);
 540                                                 SZ_Write(&net_message, data, length);
 541                                                 MSG_BeginReading();
 542                                                 return 2;
 543                                         }
 544                                 }
 545                                 else
 546                                         Con_DPrint("Got a stale datagram\n");
 547                                 return 1;
 548                         }
 549                         else if (flags & NETFLAG_ACK)
 550                         {
 551                                 if (sequence == (conn->sendSequence - 1))
 552                                 {
 553                                         if (sequence == conn->ackSequence)
 554                                         {
 555                                                 conn->ackSequence++;
 556                                                 if (conn->ackSequence != conn->sendSequence)
 557                                                         Con_DPrint("ack sequencing error\n");
 558                                                 conn->lastMessageTime = realtime;
 559                                                 conn->timeout = realtime + net_messagetimeout.value;
 560                                                 conn->sendMessageLength -= MAX_PACKETFRAGMENT;
 561                                                 if (conn->sendMessageLength > 0)
 562                                                 {
 563                                                         memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
 564                                                         conn->sendNext = true;
 565                                                         NetConn_SendMessageNext(conn);
 566                                                 }
 567                                                 else
 568                                                 {
 569                                                         conn->sendMessageLength = 0;
 570                                                         conn->canSend = true;
 571                                                 }
 572                                         }
 573                                         else
 574                                                 Con_DPrint("Duplicate ACK received\n");
 575                                 }
 576                                 else
 577                                         Con_DPrint("Stale ACK received\n");
 578                                 return 1;
 579                         }
 580                         else if (flags & NETFLAG_DATA)
 581                         {
 582                                 unsigned int temppacket[2];
 583                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
 584                                 temppacket[1] = BigLong(sequence);
 585                                 NetConn_Write(conn->mysocket, (qbyte *)temppacket, 8, &conn->peeraddress);
 586                                 if (sequence == conn->receiveSequence)
 587                                 {
 588                                         conn->lastMessageTime = realtime;
 589                                         conn->timeout = realtime + net_messagetimeout.value;
 590                                         conn->receiveSequence++;
 591                                         memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
 592                                         conn->receiveMessageLength += length;
 593                                         if (flags & NETFLAG_EOM)
 594                                         {
 595                                                 reliableMessagesReceived++;
 596                                                 length = conn->receiveMessageLength;
 597                                                 conn->receiveMessageLength = 0;
 598                                                 if (length > 0)
 599                                                 {
 600                                                         SZ_Clear(&net_message);
 601                                                         SZ_Write(&net_message, conn->receiveMessage, length);
 602                                                         MSG_BeginReading();
 603                                                         return 2;
 604                                                 }
 605                                         }
 606                                 }
 607                                 else
 608                                         receivedDuplicateCount++;
 609                                 return 1;
 610                         }
 611                 }
 612         }
 613         return 0;
 614 }
 615
 616 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
 617 {
 618         cls.connect_trying = false;
 619         // the connection request succeeded, stop current connection and set up a new connection
 620         CL_Disconnect();
 621         cls.netcon = NetConn_Open(mysocket, peeraddress);
 622         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
 623         key_dest = key_game;
 624         m_state = m_none;
 625         cls.demonum = -1;                       // not in the demo loop now
 626         cls.state = ca_connected;
 627         cls.signon = 0;                         // need all the signon messages before playing
 628         CL_ClearState();
 629         SCR_BeginLoadingPlaque();
 630 }
 631
 632 int NetConn_IsLocalGame(void)
 633 {
 634         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
 635                 return true;
 636         return false;
 637 }
 638
 639 static struct
 640 {
 641         double senttime;
 642         lhnetaddress_t peeraddress;
 643 }
 644 pingcache[HOSTCACHESIZE];
 645
 646 int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
 647 {
 648         int ret, c, control;
 649         lhnetaddress_t svaddress;
 650         const char *s;
 651         char *string, addressstring2[128], cname[128], ipstring[32];
 652         char stringbuf[16384];
 653
 654         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
 655         {
 656                 // received a command string - strip off the packaging and put it
 657                 // into our string buffer with NULL termination
 658                 data += 4;
 659                 length -= 4;
 660                 length = min(length, (int)sizeof(stringbuf) - 1);
 661                 memcpy(stringbuf, data, length);
 662                 stringbuf[length] = 0;
 663                 string = stringbuf;
 664
 665                 if (developer.integer)
 666                 {
 667                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 668                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
 669                         Com_HexDumpToConsole(data, length);
 670                 }
 671
 672                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
 673                 {
 674                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 675                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
 676                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\challenge\\%s", string + 10), peeraddress);
 677                         return true;
 678                 }
 679                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
 680                 {
 681                         NetConn_ConnectionEstablished(mysocket, peeraddress);
 682                         return true;
 683                 }
 684                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
 685                 {
 686                         cls.connect_trying = false;
 687                         string += 7;
 688                         length = max(length - 7, (int)sizeof(m_return_reason) - 1);
 689                         memcpy(m_return_reason, string, length);
 690                         m_return_reason[length] = 0;
 691                         Con_Printf("%s\n", m_return_reason);
 692                         return true;
 693                 }
 694                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
 695                 {
 696                         int i, j, c, n, users, maxusers;
 697                         char game[32], mod[32], map[32], name[128];
 698                         double pingtime;
 699                         hostcache_t temp;
 700                         string += 13;
 701                         // hostcache only uses text addresses
 702                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
 703                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(game, s, sizeof (game));else game[0] = 0;
 704                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(mod , s, sizeof (mod ));else mod[0]  = 0;
 705                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(map , s, sizeof (map ));else map[0]  = 0;
 706                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(name, s, sizeof (name));else name[0] = 0;
 707                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) c = atoi(s);else c = -1;
 708                         if ((s = SearchInfostring(string, "clients"      )) != NULL) users = atoi(s);else users = 0;
 709                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) maxusers = atoi(s);else maxusers = 0;
 710                         // search the cache for this server and update it
 711                         for (n = 0; n < hostCacheCount; n++)
 712                         {
 713                                 if (!strcmp(cname, hostcache[n].cname))
 714                                 {
 715                                         if (hostcache[n].ping == 100000)
 716                                                 serverreplycount++;
 717                                         pingtime = (int)((realtime - hostcache[n].querytime) * 1000.0);
 718                                         pingtime = bound(0, pingtime, 9999);
 719                                         // update the ping
 720                                         hostcache[n].ping = pingtime;
 721                                         // build description strings for the things users care about
 722                                         snprintf(hostcache[n].line1, sizeof(hostcache[n].line1), "%5d%c%3u/%3u %-65.65s", (int)pingtime, c != NET_PROTOCOL_VERSION ? '*' : ' ', users, maxusers, name);
 723                                         snprintf(hostcache[n].line2, sizeof(hostcache[n].line2), "%-21.21s %-19.19s %-17.17s %-20.20s", cname, game, mod, map);
 724                                         // if ping is especially high, display it as such
 725                                         if (pingtime >= 300)
 726                                         {
 727                                                 // orange numbers (lower block)
 728                                                 for (i = 0;i < 5;i++)
 729                                                         if (hostcache[n].line1[i] != ' ')
 730                                                                 hostcache[n].line1[i] += 128;
 731                                         }
 732                                         else if (pingtime >= 200)
 733                                         {
 734                                                 // yellow numbers (in upper block)
 735                                                 for (i = 0;i < 5;i++)
 736                                                         if (hostcache[n].line1[i] != ' ')
 737                                                                 hostcache[n].line1[i] -= 30;
 738                                         }
 739                                         // if not in the slist menu we should print the server to console
 740                                         if (m_state != m_slist)
 741                                                 Con_Printf("%s\n%s\n", hostcache[n].line1, hostcache[n].line2);
 742                                         // and finally, re-sort the list
 743                                         for (i = 0;i < hostCacheCount;i++)
 744                                         {
 745                                                 for (j = i + 1;j < hostCacheCount;j++)
 746                                                 {
 747                                                         //if (strcmp(hostcache[j].name, hostcache[i].name) < 0)
 748                                                         if (hostcache[i].ping > hostcache[j].ping)
 749                                                         {
 750                                                                 memcpy(&temp, &hostcache[j], sizeof(hostcache_t));
 751                                                                 memcpy(&hostcache[j], &hostcache[i], sizeof(hostcache_t));
 752                                                                 memcpy(&hostcache[i], &temp, sizeof(hostcache_t));
 753                                                         }
 754                                                 }
 755                                         }
 756                                         break;
 757                                 }
 758                         }
 759                         return true;
 760                 }
 761                 if (!strncmp(string, "getserversResponse\\", 19) && hostCacheCount < HOSTCACHESIZE)
 762                 {
 763                         int i, n, j;
 764                         hostcache_t temp;
 765                         // Extract the IP addresses
 766                         data += 18;
 767                         length -= 18;
 768                         masterreplycount++;
 769                         if (m_state != m_slist)
 770                                 Con_Print("received server list...\n");
 771                         while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
 772                         {
 773                                 snprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], (data[5] << 8) | data[6]);
 774                                 if (developer.integer)
 775                                         Con_Printf("Requesting info from server %s\n", ipstring);
 776                                 LHNETADDRESS_FromString(&svaddress, ipstring, 0);
 777                                 NetConn_WriteString(mysocket, "\377\377\377\377getinfo", &svaddress);
 778
 779
 780                                 // add to slist (hostCache)
 781                                 // search the cache for this server
 782                                 for (n = 0; n < hostCacheCount; n++)
 783                                         if (!strcmp(ipstring, hostcache[n].cname))
 784                                                 break;
 785                                 // add it or update it
 786                                 if (n == hostCacheCount)
 787                                 {
 788                                         // if cache is full replace highest ping server (the list is
 789                                         // kept sorted so this is always the last, and if this server
 790                                         // is good it will be sorted into an early part of the list)
 791                                         if (hostCacheCount >= HOSTCACHESIZE)
 792                                                 n = hostCacheCount - 1;
 793                                         else
 794                                         {
 795                                                 serverquerycount++;
 796                                                 hostCacheCount++;
 797                                         }
 798                                 }
 799                                 memset(&hostcache[n], 0, sizeof(hostcache[n]));
 800                                 // store the data the engine cares about (address and ping)
 801                                 strlcpy (hostcache[n].cname, ipstring, sizeof (hostcache[n].cname));
 802                                 hostcache[n].ping = 100000;
 803                                 hostcache[n].querytime = realtime;
 804                                 // build description strings for the things users care about
 805                                 strlcpy (hostcache[n].line1, "?", sizeof (hostcache[n].line1));
 806                                 strlcpy (hostcache[n].line2, ipstring, sizeof (hostcache[n].line2));
 807                                 // if not in the slist menu we should print the server to console
 808                                 if (m_state != m_slist)
 809                                         Con_Printf("querying %s\n", ipstring);
 810                                 // and finally, re-sort the list
 811                                 for (i = 0;i < hostCacheCount;i++)
 812                                 {
 813                                         for (j = i + 1;j < hostCacheCount;j++)
 814                                         {
 815                                                 //if (strcmp(hostcache[j].name, hostcache[i].name) < 0)
 816                                                 if (hostcache[i].ping > hostcache[j].ping)
 817                                                 {
 818                                                         memcpy(&temp, &hostcache[j], sizeof(hostcache_t));
 819                                                         memcpy(&hostcache[j], &hostcache[i], sizeof(hostcache_t));
 820                                                         memcpy(&hostcache[i], &temp, sizeof(hostcache_t));
 821                                                 }
 822                                         }
 823                                 }
 824
 825
 826                                 // move on to next address in packet
 827                                 data += 7;
 828                                 length -= 7;
 829                         }
 830                         return true;
 831                 }
 832                 /*
 833                 if (!strncmp(string, "ping", 4))
 834                 {
 835                         if (developer.integer)
 836                                 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
 837                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
 838                         return true;
 839                 }
 840                 if (!strncmp(string, "ack", 3))
 841                         return true;
 842                 */
 843                 // we may not have liked the packet, but it was a command packet, so
 844                 // we're done processing this packet now
 845                 return true;
 846         }
 847         // netquake control packets, supported for compatibility only
 848         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
 849         {
 850                 c = data[4];
 851                 data += 5;
 852                 length -= 5;
 853                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 854                 switch (c)
 855                 {
 856                 case CCREP_ACCEPT:
 857                         if (developer.integer)
 858                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
 859                         if (cls.connect_trying)
 860                         {
 861                                 lhnetaddress_t clientportaddress;
 862                                 clientportaddress = *peeraddress;
 863                                 if (length >= 4)
 864                                 {
 865                                         unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
 866                                         data += 4;
 867                                         length -= 4;
 868                                         LHNETADDRESS_SetPort(&clientportaddress, port);
 869                                 }
 870                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress);
 871                         }
 872                         break;
 873                 case CCREP_REJECT:
 874                         if (developer.integer)
 875                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
 876                         Con_Printf("%s\n", data);
 877                         strlcpy (m_return_reason, data, sizeof (m_return_reason));
 878                         break;
 879 #if 0
 880                 case CCREP_SERVER_INFO:
 881                         if (developer.integer)
 882                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
 883                         if (cls.state != ca_dedicated)
 884                         {
 885                                 // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address
 886                                 // string we just ignore it and keep the real address
 887                                 MSG_ReadString();
 888                                 // hostcache only uses text addresses
 889                                 cname = UDP_AddrToString(readaddr);
 890                                 // search the cache for this server
 891                                 for (n = 0; n < hostCacheCount; n++)
 892                                         if (!strcmp(cname, hostcache[n].cname))
 893                                                 break;
 894                                 // add it
 895                                 if (n == hostCacheCount && hostCacheCount < HOSTCACHESIZE)
 896                                 {
 897                                         hostCacheCount++;
 898                                         memset(&hostcache[n], 0, sizeof(hostcache[n]));
 899                                         strlcpy (hostcache[n].name, MSG_ReadString(), sizeof (hostcache[n].name));
 900                                         strlcpy (hostcache[n].map, MSG_ReadString(), sizeof (hostcache[n].map));
 901                                         hostcache[n].users = MSG_ReadByte();
 902                                         hostcache[n].maxusers = MSG_ReadByte();
 903                                         c = MSG_ReadByte();
 904                                         if (c != NET_PROTOCOL_VERSION)
 905                                         {
 906                                                 strlcpy (hostcache[n].cname, hostcache[n].name, sizeof (hostcache[n].cname));
 907                                                 strcpy(hostcache[n].name, "*");
 908                                                 strlcat (hostcache[n].name, hostcache[n].cname, sizeof(hostcache[n].name));
 909                                         }
 910                                         strlcpy (hostcache[n].cname, cname, sizeof (hostcache[n].cname));
 911                                 }
 912                         }
 913                         break;
 914                 case CCREP_PLAYER_INFO:
 915                         // we got a CCREP_PLAYER_INFO??
 916                         //if (developer.integer)
 917                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
 918                         break;
 919                 case CCREP_RULE_INFO:
 920                         // we got a CCREP_RULE_INFO??
 921                         //if (developer.integer)
 922                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
 923                         break;
 924 #endif
 925                 default:
 926                         break;
 927                 }
 928                 // we may not have liked the packet, but it was a valid control
 929                 // packet, so we're done processing this packet now
 930                 return true;
 931         }
 932         ret = 0;
 933         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)
 934                 CL_ParseServerMessage();
 935         return ret;
 936 }
 937
 938 void NetConn_ClientFrame(void)
 939 {
 940         int i, length;
 941         lhnetaddress_t peeraddress;
 942         netconn_t *conn;
 943         NetConn_UpdateServerStuff();
 944         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
 945         {
 946                 if (cls.connect_remainingtries == 0)
 947                 {
 948                         cls.connect_trying = false;
 949                         if (m_state == m_slist)
 950                                 strcpy (m_return_reason, "Connect: Failed");
 951                         else
 952                                 Con_Print("Connect failed\n");
 953                         return;
 954                 }
 955                 if (cls.connect_nextsendtime)
 956                 {
 957                         if (m_state == m_slist)
 958                                 strcpy (m_return_reason, "Connect: Still trying");
 959                         else
 960                                 Con_Print("Still trying...\n");
 961                 }
 962                 else
 963                 {
 964                         if (m_state == m_slist)
 965                                 strcpy (m_return_reason, "Connect: Trying");
 966                         else
 967                                 Con_Print("Trying...\n");
 968                 }
 969                 cls.connect_nextsendtime = realtime + 1;
 970                 cls.connect_remainingtries--;
 971                 // try challenge first (newer server)
 972                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
 973                 // then try netquake as a fallback (old server, or netquake)
 974                 SZ_Clear(&net_message);
 975                 // save space for the header, filled in later
 976                 MSG_WriteLong(&net_message, 0);
 977                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
 978                 MSG_WriteString(&net_message, "QUAKE");
 979                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
 980                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 981                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
 982                 SZ_Clear(&net_message);
 983         }
 984         for (i = 0;i < cl_numsockets;i++)
 985                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
 986                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
 987         if (cls.netcon && realtime > cls.netcon->timeout)
 988         {
 989                 Con_Print("Connection timed out\n");
 990                 CL_Disconnect();
 991                 Host_ShutdownServer (false);
 992         }
 993         for (conn = netconn_list;conn;conn = conn->next)
 994                 NetConn_ReSendMessage(conn);
 995 }
 996
 997 #define MAX_CHALLENGES 128
 998 struct
 999 {
1000         lhnetaddress_t address;
1001         double time;
1002         char string[12];
1003 }
1004 challenge[MAX_CHALLENGES];
1005
1006 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
1007 {
1008         int i;
1009         char c;
1010         for (i = 0;i < bufferlength - 1;i++)
1011         {
1012                 do
1013                 {
1014                         c = rand () % (127 - 33) + 33;
1015                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
1016                 buffer[i] = c;
1017         }
1018         buffer[i] = 0;
1019 }
1020
1021 extern void SV_ConnectClient(int clientnum, netconn_t *netconnection);
1022 int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
1023 {
1024         int i, n, ret, clientnum, responselength, best;
1025         double besttime;
1026         client_t *client;
1027         netconn_t *conn;
1028         char *s, *string, response[512], addressstring2[128], stringbuf[16384];
1029
1030         if (sv.active)
1031         {
1032                 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1033                 {
1034                         // received a command string - strip off the packaging and put it
1035                         // into our string buffer with NULL termination
1036                         data += 4;
1037                         length -= 4;
1038                         length = min(length, (int)sizeof(stringbuf) - 1);
1039                         memcpy(stringbuf, data, length);
1040                         stringbuf[length] = 0;
1041                         string = stringbuf;
1042
1043                         if (developer.integer)
1044                         {
1045                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1046                                 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1047                                 Com_HexDumpToConsole(data, length);
1048                         }
1049
1050                         if (length >= 12 && !memcmp(string, "getchallenge", 12))
1051                         {
1052                                 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1053                                 {
1054                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1055                                                 break;
1056                                         if (besttime > challenge[i].time)
1057                                                 besttime = challenge[best = i].time;
1058                                 }
1059                                 // if we did not find an exact match, choose the oldest and
1060                                 // update address and string
1061                                 if (i == MAX_CHALLENGES)
1062                                 {
1063                                         i = best;
1064                                         challenge[i].address = *peeraddress;
1065                                         NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1066                                 }
1067                                 challenge[i].time = realtime;
1068                                 // send the challenge
1069                                 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1070                                 return true;
1071                         }
1072                         if (length > 8 && !memcmp(string, "connect\\", 8))
1073                         {
1074                                 string += 7;
1075                                 length -= 7;
1076                                 if ((s = SearchInfostring(string, "challenge")))
1077                                 {
1078                                         // validate the challenge
1079                                         for (i = 0;i < MAX_CHALLENGES;i++)
1080                                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1081                                                         break;
1082                                         if (i < MAX_CHALLENGES)
1083                                         {
1084                                                 // check engine protocol
1085                                                 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1086                                                 {
1087                                                         if (developer.integer)
1088                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1089                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1090                                                 }
1091                                                 else
1092                                                 {
1093                                                         // see if this is a duplicate connection request
1094                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1095                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1096                                                                         break;
1097                                                         if (clientnum < svs.maxclients)
1098                                                         {
1099                                                                 // duplicate connection request
1100                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1101                                                                 {
1102                                                                         // client is still trying to connect,
1103                                                                         // so we send a duplicate reply
1104                                                                         if (developer.integer)
1105                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1106                                                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1107                                                                 }
1108                                                                 // only kick if old connection seems dead
1109                                                                 if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1110                                                                 {
1111                                                                         // kick off connection and await retry
1112                                                                         client->deadsocket = true;
1113                                                                 }
1114                                                         }
1115                                                         else
1116                                                         {
1117                                                                 // this is a new client, find a slot
1118                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1119                                                                         if (!client->active)
1120                                                                                 break;
1121                                                                 if (clientnum < svs.maxclients)
1122                                                                 {
1123                                                                         // prepare the client struct
1124                                                                         if ((conn = NetConn_Open(mysocket, peeraddress)))
1125                                                                         {
1126                                                                                 // allocated connection
1127                                                                                 LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true);
1128                                                                                 if (developer.integer)
1129                                                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1130                                                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1131                                                                                 // now set up the client
1132                                                                                 SV_ConnectClient(clientnum, conn);
1133                                                                                 NetConn_Heartbeat(1);
1134                                                                         }
1135                                                                 }
1136                                                                 else
1137                                                                 {
1138                                                                         // server is full
1139                                                                         if (developer.integer)
1140                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1141                                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1142                                                                 }
1143                                                         }
1144                                                 }
1145                                         }
1146                                 }
1147                                 return true;
1148                         }
1149                         if (length >= 7 && !memcmp(string, "getinfo", 7))
1150                         {
1151                                 const char *challenge = NULL;
1152                                 // If there was a challenge in the getinfo message
1153                                 if (length > 8 && string[7] == ' ')
1154                                         challenge = string + 8;
1155                                 for (i = 0, n = 0;i < svs.maxclients;i++)
1156                                         if (svs.clients[i].active)
1157                                                 n++;
1158                                 responselength = snprintf(response, sizeof(response), "\377\377\377\377infoResponse\x0A"
1159                                                         "\\gamename\\%s\\modname\\%s\\sv_maxclients\\%d"
1160                                                         "\\clients\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d%s%s",
1161                                                         gamename, com_modname, svs.maxclients, n,
1162                                                         sv.name, hostname.string, NET_PROTOCOL_VERSION, challenge ? "\\challenge\\" : "", challenge ? challenge : "");
1163                                 // does it fit in the buffer?
1164                                 if (responselength < (int)sizeof(response))
1165                                 {
1166                                         if (developer.integer)
1167                                                 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1168                                         NetConn_WriteString(mysocket, response, peeraddress);
1169                                 }
1170                                 return true;
1171                         }
1172                         /*
1173                         if (!strncmp(string, "ping", 4))
1174                         {
1175                                 if (developer.integer)
1176                                         Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1177                                 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1178                                 return true;
1179                         }
1180                         if (!strncmp(string, "ack", 3))
1181                                 return true;
1182                         */
1183                         // we may not have liked the packet, but it was a command packet, so
1184                         // we're done processing this packet now
1185                         return true;
1186                 }
1187                 // LordHavoc: disabled netquake control packet support in server
1188 #if 0
1189                 {
1190                         int c, control;
1191                         // netquake control packets, supported for compatibility only
1192                         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1193                         {
1194                                 c = data[4];
1195                                 data += 5;
1196                                 length -= 5;
1197                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1198                                 switch (c)
1199                                 {
1200                                 case CCREQ_CONNECT:
1201                                         //if (developer.integer)
1202                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
1203                                         if (length >= (int)strlen("QUAKE") + 1 + 1)
1204                                         {
1205                                                 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
1206                                                 {
1207                                                         if (developer.integer)
1208                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
1209                                                         SZ_Clear(&net_message);
1210                                                         // save space for the header, filled in later
1211                                                         MSG_WriteLong(&net_message, 0);
1212                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1213                                                         MSG_WriteString(&net_message, "Incompatible version.\n");
1214                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1215                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1216                                                         SZ_Clear(&net_message);
1217                                                 }
1218                                                 else
1219                                                 {
1220                                                         // see if this is a duplicate connection request
1221                                                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1222                                                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1223                                                                         break;
1224                                                         if (clientnum < svs.maxclients)
1225                                                         {
1226                                                                 // duplicate connection request
1227                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1228                                                                 {
1229                                                                         // client is still trying to connect,
1230                                                                         // so we send a duplicate reply
1231                                                                         if (developer.integer)
1232                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
1233                                                                         SZ_Clear(&net_message);
1234                                                                         // save space for the header, filled in later
1235                                                                         MSG_WriteLong(&net_message, 0);
1236                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1237                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
1238                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1239                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1240                                                                         SZ_Clear(&net_message);
1241                                                                 }
1242                                                                 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1243                                                                 {
1244                                                                         // the old client hasn't sent us anything
1245                                                                         // in quite a while, so kick off and let
1246                                                                         // the retry take care of it...
1247                                                                         client->deadsocket = true;
1248                                                                 }
1249                                                         }
1250                                                         else
1251                                                         {
1252                                                                 // this is a new client, find a slot
1253                                                                 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1254                                                                         if (!client->active)
1255                                                                                 break;
1256                                                                 if (clientnum < svs.maxclients && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
1257                                                                 {
1258                                                                         // connect to the client
1259                                                                         // everything is allocated, just fill in the details
1260                                                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
1261                                                                         if (developer.integer)
1262                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
1263                                                                         // send back the info about the server connection
1264                                                                         SZ_Clear(&net_message);
1265                                                                         // save space for the header, filled in later
1266                                                                         MSG_WriteLong(&net_message, 0);
1267                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1268                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
1269                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1270                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1271                                                                         SZ_Clear(&net_message);
1272                                                                         // now set up the client struct
1273                                                                         SV_ConnectClient(clientnum, conn);
1274                                                                         NetConn_Heartbeat(1);
1275                                                                 }
1276                                                                 else
1277                                                                 {
1278                                                                         //if (developer.integer)
1279                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
1280                                                                         // no room; try to let player know
1281                                                                         SZ_Clear(&net_message);
1282                                                                         // save space for the header, filled in later
1283                                                                         MSG_WriteLong(&net_message, 0);
1284                                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1285                                                                         MSG_WriteString(&net_message, "Server is full.\n");
1286                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1287                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1288                                                                         SZ_Clear(&net_message);
1289                                                                 }
1290                                                         }
1291                                                 }
1292                                         }
1293                                         break;
1294 #if 0
1295                                 case CCREQ_SERVER_INFO:
1296                                         if (developer.integer)
1297                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
1298                                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
1299                                         {
1300                                                 if (developer.integer)
1301                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
1302                                                 SZ_Clear(&net_message);
1303                                                 // save space for the header, filled in later
1304                                                 MSG_WriteLong(&net_message, 0);
1305                                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
1306                                                 UDP_GetSocketAddr(UDP_acceptSock, &newaddr);
1307                                                 MSG_WriteString(&net_message, UDP_AddrToString(&newaddr));
1308                                                 MSG_WriteString(&net_message, hostname.string);
1309                                                 MSG_WriteString(&net_message, sv.name);
1310                                                 MSG_WriteByte(&net_message, net_activeconnections);
1311                                                 MSG_WriteByte(&net_message, svs.maxclients);
1312                                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1313                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1314                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1315                                                 SZ_Clear(&net_message);
1316                                         }
1317                                         break;
1318                                 case CCREQ_PLAYER_INFO:
1319                                         if (developer.integer)
1320                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
1321                                         if (sv.active)
1322                                         {
1323                                                 int playerNumber, activeNumber, clientNumber;
1324                                                 client_t *client;
1325
1326                                                 playerNumber = MSG_ReadByte();
1327                                                 activeNumber = -1;
1328                                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
1329                                                         if (client->active && ++activeNumber == playerNumber)
1330                                                                 break;
1331                                                 if (clientNumber != svs.maxclients)
1332                                                 {
1333                                                         SZ_Clear(&net_message);
1334                                                         // save space for the header, filled in later
1335                                                         MSG_WriteLong(&net_message, 0);
1336                                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
1337                                                         MSG_WriteByte(&net_message, playerNumber);
1338                                                         MSG_WriteString(&net_message, client->name);
1339                                                         MSG_WriteLong(&net_message, client->colors);
1340                                                         MSG_WriteLong(&net_message, (int)client->edict->v->frags);
1341                                                         MSG_WriteLong(&net_message, (int)(realtime - client->netconnection->connecttime));
1342                                                         MSG_WriteString(&net_message, client->netconnection->address);
1343                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1344                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1345                                                         SZ_Clear(&net_message);
1346                                                 }
1347                                         }
1348                                         break;
1349                                 case CCREQ_RULE_INFO:
1350                                         if (developer.integer)
1351                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
1352                                         if (sv.active)
1353                                         {
1354                                                 char *prevCvarName;
1355                                                 cvar_t *var;
1356
1357                                                 // find the search start location
1358                                                 prevCvarName = MSG_ReadString();
1359                                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
1360
1361                                                 // send the response
1362                                                 SZ_Clear(&net_message);
1363                                                 // save space for the header, filled in later
1364                                                 MSG_WriteLong(&net_message, 0);
1365                                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
1366                                                 if (var)
1367                                                 {
1368                                                         MSG_WriteString(&net_message, var->name);
1369                                                         MSG_WriteString(&net_message, var->string);
1370                                                 }
1371                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1372                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1373                                                 SZ_Clear(&net_message);
1374                                         }
1375                                         break;
1376 #endif
1377                                 default:
1378                                         break;
1379                                 }
1380                                 // we may not have liked the packet, but it was a valid control
1381                                 // packet, so we're done processing this packet now
1382                                 return true;
1383                         }
1384                 }
1385 #endif
1386                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1387                 {
1388                         if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1389                         {
1390                                 sv_player = host_client->edict;
1391                                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length)) == 2)
1392                                         SV_ReadClientMessage();
1393                                 return ret;
1394                         }
1395                 }
1396         }
1397         return 0;
1398 }
1399
1400 void NetConn_ServerFrame(void)
1401 {
1402         int i, length;
1403         lhnetaddress_t peeraddress;
1404         netconn_t *conn;
1405         NetConn_UpdateServerStuff();
1406         for (i = 0;i < sv_numsockets;i++)
1407                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1408                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
1409         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1410         {
1411                 // never timeout loopback connections
1412                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(host_client->netconnection->mysocket)) != LHNETADDRESSTYPE_LOOP)
1413                 {
1414                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
1415                         sv_player = host_client->edict;
1416                         SV_DropClient(false);
1417                 }
1418         }
1419         for (conn = netconn_list;conn;conn = conn->next)
1420                 NetConn_ReSendMessage(conn);
1421 }
1422
1423 void NetConn_QueryMasters(void)
1424 {
1425         int i;
1426         int masternum;
1427         lhnetaddress_t masteraddress;
1428         char request[256];
1429
1430         if (hostCacheCount >= HOSTCACHESIZE)
1431                 return;
1432
1433         for (i = 0;i < cl_numsockets;i++)
1434         {
1435                 if (cl_sockets[i])
1436                 {
1437 #if 0
1438                         // search LAN
1439 #if 1
1440                         UDP_Broadcast(UDP_controlSock, "\377\377\377\377getinfo", 11);
1441 #else
1442                         SZ_Clear(&net_message);
1443                         // save space for the header, filled in later
1444                         MSG_WriteLong(&net_message, 0);
1445                         MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
1446                         MSG_WriteString(&net_message, "QUAKE");
1447                         MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1448                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1449                         UDP_Broadcast(UDP_controlSock, net_message.data, net_message.cursize);
1450                         SZ_Clear(&net_message);
1451 #endif
1452 #endif
1453
1454                         // build the getservers
1455                         snprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
1456
1457                         // search internet
1458                         for (masternum = 0;sv_masters[masternum].name;masternum++)
1459                         {
1460                                 if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
1461                                 {
1462                                         masterquerycount++;
1463                                         NetConn_WriteString(cl_sockets[i], request, &masteraddress);
1464                                 }
1465                         }
1466                 }
1467         }
1468         if (!masterquerycount)
1469         {
1470                 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
1471                 strcpy(m_return_reason, "No network");
1472         }
1473 }
1474
1475 void NetConn_Heartbeat(int priority)
1476 {
1477         lhnetaddress_t masteraddress;
1478         int masternum;
1479         lhnetsocket_t *mysocket;
1480
1481         // if it's a state change (client connected), limit next heartbeat to no
1482         // more than 30 sec in the future
1483         if (priority == 1 && nextheartbeattime > realtime + 30.0)
1484                 nextheartbeattime = realtime + 30.0;
1485
1486         // limit heartbeatperiod to 30 to 270 second range,
1487         // lower limit is to avoid abusing master servers with excess traffic,
1488         // upper limit is to avoid timing out on the master server (which uses
1489         // 300 sec timeout)
1490         if (sv_heartbeatperiod.value < 30)
1491                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
1492         if (sv_heartbeatperiod.value > 270)
1493                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
1494
1495         // make advertising optional and don't advertise singleplayer games, and
1496         // only send a heartbeat as often as the admin wants
1497         if (sv.active && sv_public.integer && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
1498         {
1499                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
1500                 for (masternum = 0;sv_masters[masternum].name;masternum++)
1501                         if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
1502                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
1503         }
1504 }
1505
1506 int NetConn_SendToAll(sizebuf_t *data, double blocktime)
1507 {
1508         int i, count = 0;
1509         qbyte sent[MAX_SCOREBOARD];
1510
1511         memset(sent, 0, sizeof(sent));
1512
1513         // simultaneously wait for the first CanSendMessage and send the message,
1514         // then wait for a second CanSendMessage (verifying it was received), or
1515         // the client drops and is no longer counted
1516         // the loop aborts when either it runs out of clients to send to, or a
1517         // timeout expires
1518         blocktime += Sys_DoubleTime();
1519         do
1520         {
1521                 count = 0;
1522                 NetConn_ClientFrame();
1523                 NetConn_ServerFrame();
1524                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1525                 {
1526                         if (host_client->netconnection)
1527                         {
1528                                 if (NetConn_CanSendMessage(host_client->netconnection))
1529                                 {
1530                                         if (!sent[i])
1531                                                 NetConn_SendReliableMessage(host_client->netconnection, data);
1532                                         sent[i] = true;
1533                                 }
1534                                 if (!NetConn_CanSendMessage(host_client->netconnection))
1535                                         count++;
1536                         }
1537                 }
1538         }
1539         while (count && Sys_DoubleTime() < blocktime);
1540         return count;
1541 }
1542
1543 static void Net_Heartbeat_f(void)
1544 {
1545         if (sv.active)
1546                 NetConn_Heartbeat(2);
1547         else
1548                 Con_Print("No server running, can not heartbeat to master server.\n");
1549 }
1550
1551 void PrintStats(netconn_t *conn)
1552 {
1553         Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, conn->canSend, conn->sendSequence, conn->receiveSequence);
1554 }
1555
1556 void Net_Stats_f(void)
1557 {
1558         netconn_t *conn;
1559         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
1560         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
1561         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
1562         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
1563         Con_Printf("packetsSent                = %i\n", packetsSent);
1564         Con_Printf("packetsReSent              = %i\n", packetsReSent);
1565         Con_Printf("packetsReceived            = %i\n", packetsReceived);
1566         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
1567         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
1568         Con_Print("connections                =\n");
1569         for (conn = netconn_list;conn;conn = conn->next)
1570                 PrintStats(conn);
1571 }
1572
1573 void Net_Slist_f(void)
1574 {
1575         masterquerytime = realtime;
1576         masterquerycount = 0;
1577         masterreplycount = 0;
1578         serverquerycount = 0;
1579         serverreplycount = 0;
1580         hostCacheCount = 0;
1581         memset(&pingcache, 0, sizeof(pingcache));
1582         if (m_state != m_slist)
1583                 Con_Print("Sending requests to master servers\n");
1584         NetConn_QueryMasters();
1585         if (m_state != m_slist)
1586                 Con_Print("Listening for replies...\n");
1587 }
1588
1589 void NetConn_Init(void)
1590 {
1591         int i;
1592         lhnetaddress_t tempaddress;
1593         netconn_mempool = Mem_AllocPool("Networking", 0, NULL);
1594         Cmd_AddCommand("net_stats", Net_Stats_f);
1595         Cmd_AddCommand("net_slist", Net_Slist_f);
1596         Cmd_AddCommand("heartbeat", Net_Heartbeat_f);
1597         Cvar_RegisterVariable(&net_messagetimeout);
1598         Cvar_RegisterVariable(&net_messagerejointimeout);
1599         Cvar_RegisterVariable(&net_connecttimeout);
1600         Cvar_RegisterVariable(&cl_netlocalping_min);
1601         Cvar_RegisterVariable(&cl_netlocalping_max);
1602         Cvar_RegisterVariable(&cl_netpacketloss_receive);
1603         Cvar_RegisterVariable(&cl_netpacketloss_send);
1604         Cvar_RegisterVariable(&sv_netpacketloss_receive);
1605         Cvar_RegisterVariable(&sv_netpacketloss_send);
1606         Cvar_RegisterVariable(&hostname);
1607         Cvar_RegisterVariable(&developer_networking);
1608         Cvar_RegisterVariable(&cl_netport);
1609         Cvar_RegisterVariable(&sv_netport);
1610         Cvar_RegisterVariable(&net_address);
1611         //Cvar_RegisterVariable(&net_address_ipv6);
1612         Cvar_RegisterVariable(&sv_public);
1613         Cvar_RegisterVariable(&sv_heartbeatperiod);
1614         for (i = 0;sv_masters[i].name;i++)
1615                 Cvar_RegisterVariable(&sv_masters[i]);
1616 // COMMANDLINEOPTION: Server: -ip <ipaddress> sets the ip address of this machine for purposes of networking (default 0.0.0.0 also known as INADDR_ANY), use only if you have multiple network adapters and need to choose one specifically.
1617         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
1618         {
1619                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
1620                 {
1621                         Con_Printf("-ip option used, setting net_address to \"%s\"\n");
1622                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
1623                 }
1624                 else
1625                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
1626         }
1627 // COMMANDLINEOPTION: Server: -port <portnumber> sets the port to use for a server (default 26000, the same port as QUAKE itself), useful if you host multiple servers on your machine
1628         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
1629         {
1630                 i = atoi(com_argv[i + 1]);
1631                 if (i >= 0 && i < 65536)
1632                 {
1633                         Con_Printf("-port option used, setting port cvar to %i\n", i);
1634                         Cvar_SetValueQuick(&sv_netport, i);
1635                 }
1636                 else
1637                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
1638         }
1639         cl_numsockets = 0;
1640         sv_numsockets = 0;
1641         memset(&pingcache, 0, sizeof(pingcache));
1642         SZ_Alloc(&net_message, NET_MAXMESSAGE, "net_message");
1643         LHNET_Init();
1644 }
1645
1646 void NetConn_Shutdown(void)
1647 {
1648         NetConn_CloseClientPorts();
1649         NetConn_CloseServerPorts();
1650         LHNET_Shutdown();
1651 }
1652