fix a (very bad!) bug with -port cvar setting
[divverent/darkplaces.git] / netconn.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3 Copyright (C) 2002 Mathieu Olivier
4 Copyright (C) 2003 Forest Hale
5
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License
8 as published by the Free Software Foundation; either version 2
9 of the License, or (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14
15 See the GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
20
21 */
22
23 #include "quakedef.h"
24 #include "lhnet.h"
25
26 #define MASTER_PORT 27950
27
28 cvar_t sv_public = {0, "sv_public", "0"};
29 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "180"};
30
31 static cvar_t sv_masters [] =
32 {
33         {CVAR_SAVE, "sv_master1", ""},
34         {CVAR_SAVE, "sv_master2", ""},
35         {CVAR_SAVE, "sv_master3", ""},
36         {CVAR_SAVE, "sv_master4", ""},
37         {0, "sv_masterextra1", "198.88.152.4"},
38         {0, "sv_masterextra2", "68.102.242.12"},
39         {0, NULL, NULL}
40 };
41
42 static double nextheartbeattime = 0;
43
44 sizebuf_t net_message;
45
46 cvar_t net_messagetimeout = {0, "net_messagetimeout","300"};
47 cvar_t net_messagerejointimeout = {0, "net_messagerejointimeout","10"};
48 cvar_t net_connecttimeout = {0, "net_connecttimeout","10"};
49 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED"};
50 cvar_t developer_networking = {0, "developer_networking", "0"};
51
52 cvar_t cl_fakelocalping_min = {0, "cl_fakelocalping_min","0"};
53 cvar_t cl_fakelocalping_max = {0, "cl_fakelocalping_max","0"};
54 static cvar_t cl_fakepacketloss_receive = {0, "cl_fakepacketloss_receive","0"};
55 static cvar_t cl_fakepacketloss_send = {0, "cl_fakepacketloss_send","0"};
56 static cvar_t sv_fakepacketloss_receive = {0, "sv_fakepacketloss_receive","0"};
57 static cvar_t sv_fakepacketloss_send = {0, "sv_fakepacketloss_send","0"};
58
59
60 /* statistic counters */
61 static int packetsSent = 0;
62 static int packetsReSent = 0;
63 static int packetsReceived = 0;
64 static int receivedDuplicateCount = 0;
65 static int droppedDatagrams = 0;
66
67 static int unreliableMessagesSent = 0;
68 static int unreliableMessagesReceived = 0;
69 static int reliableMessagesSent = 0;
70 static int reliableMessagesReceived = 0;
71
72 int hostCacheCount = 0;
73 hostcache_t hostcache[HOSTCACHESIZE];
74
75 static qbyte sendbuffer[NET_MAXMESSAGE];
76 static qbyte readbuffer[NET_MAXMESSAGE];
77
78 int cl_numsockets;
79 lhnetsocket_t *cl_sockets[16];
80 int sv_numsockets;
81 lhnetsocket_t *sv_sockets[16];
82
83 netconn_t *netconn_list = NULL;
84 mempool_t *netconn_mempool = NULL;
85
86 cvar_t cl_netport = {0, "cl_port", "0"};
87 cvar_t cl_netaddress = {0, "cl_netaddress", "0.0.0.0"};
88 cvar_t cl_netaddress_ipv6 = {0, "cl_netaddress_ipv6", "[0:0:0:0:0:0:0:0]:0"};
89
90 cvar_t sv_netport = {0, "port", "26000"};
91 cvar_t sv_netaddress = {0, "sv_netaddress", "0.0.0.0"};
92 cvar_t sv_netaddress_ipv6 = {0, "sv_netaddress_ipv6", "[0:0:0:0:0:0:0:0]:26000"};
93
94 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
95 {
96         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
97         int i;
98         if (cl_fakepacketloss_receive.integer)
99                 for (i = 0;i < cl_numsockets;i++)
100                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_fakepacketloss_receive.integer)
101                                 return 0;
102         if (sv_fakepacketloss_receive.integer)
103                 for (i = 0;i < cl_numsockets;i++)
104                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_fakepacketloss_receive.integer)
105                                 return 0;
106         if (developer_networking.integer && length != 0)
107         {
108                 char addressstring[128], addressstring2[128];
109                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
110                 if (length > 0)
111                 {
112                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
113                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
114                         Com_HexDumpToConsole(data, length);
115                 }
116                 else
117                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
118         }
119         return length;
120 }
121
122 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
123 {
124         int ret;
125         int i;
126         if (cl_fakepacketloss_send.integer)
127                 for (i = 0;i < cl_numsockets;i++)
128                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_fakepacketloss_send.integer)
129                                 return length;
130         if (sv_fakepacketloss_send.integer)
131                 for (i = 0;i < cl_numsockets;i++)
132                         if (sv_sockets[i] == mysocket && (rand() % 100) < sv_fakepacketloss_send.integer)
133                                 return length;
134         ret = LHNET_Write(mysocket, data, length, peeraddress);
135         if (developer_networking.integer)
136         {
137                 char addressstring[128], addressstring2[128];
138                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
139                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
140                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
141                 Com_HexDumpToConsole(data, length);
142         }
143         return ret;
144 }
145
146 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
147 {
148         // note this does not include the trailing NULL because we add that in the parser
149         return NetConn_Write(mysocket, string, strlen(string), peeraddress);
150 }
151
152 int NetConn_SendReliableMessage(netconn_t *conn, sizebuf_t *data)
153 {
154         unsigned int packetLen;
155         unsigned int dataLen;
156         unsigned int eom;
157         unsigned int *header;
158
159 //#ifdef DEBUG
160         if (data->cursize == 0)
161                 Sys_Error("Datagram_SendMessage: zero length message\n");
162
163         if (data->cursize > NET_MAXMESSAGE)
164                 Sys_Error("Datagram_SendMessage: message too big %u\n", data->cursize);
165
166         if (conn->canSend == false)
167                 Sys_Error("SendMessage: called with canSend == false\n");
168 //#endif
169
170         memcpy(conn->sendMessage, data->data, data->cursize);
171         conn->sendMessageLength = data->cursize;
172
173         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
174         {
175                 dataLen = conn->sendMessageLength;
176                 eom = NETFLAG_EOM;
177         }
178         else
179         {
180                 dataLen = MAX_PACKETFRAGMENT;
181                 eom = 0;
182         }
183
184         packetLen = NET_HEADERSIZE + dataLen;
185
186         header = (void *)sendbuffer;
187         header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
188         header[1] = BigLong(conn->sendSequence);
189         memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
190
191         conn->sendSequence++;
192         conn->canSend = false;
193
194         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
195                 return -1;
196
197         conn->lastSendTime = realtime;
198         packetsSent++;
199         reliableMessagesSent++;
200         return 1;
201 }
202
203 static void NetConn_SendMessageNext(netconn_t *conn)
204 {
205         unsigned int packetLen;
206         unsigned int dataLen;
207         unsigned int eom;
208         unsigned int *header;
209
210         if (conn->sendMessageLength && !conn->canSend && conn->sendNext)
211         {
212                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
213                 {
214                         dataLen = conn->sendMessageLength;
215                         eom = NETFLAG_EOM;
216                 }
217                 else
218                 {
219                         dataLen = MAX_PACKETFRAGMENT;
220                         eom = 0;
221                 }
222
223                 packetLen = NET_HEADERSIZE + dataLen;
224
225                 header = (void *)sendbuffer;
226                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
227                 header[1] = BigLong(conn->sendSequence);
228                 memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
229
230                 conn->sendSequence++;
231                 conn->sendNext = false;
232
233                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
234                         return;
235
236                 conn->lastSendTime = realtime;
237                 packetsSent++;
238         }
239 }
240
241 static void NetConn_ReSendMessage(netconn_t *conn)
242 {
243         unsigned int packetLen;
244         unsigned int dataLen;
245         unsigned int eom;
246         unsigned int *header;
247
248         if (conn->sendMessageLength && !conn->canSend && (realtime - conn->lastSendTime) > 1.0)
249         {
250                 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
251                 {
252                         dataLen = conn->sendMessageLength;
253                         eom = NETFLAG_EOM;
254                 }
255                 else
256                 {
257                         dataLen = MAX_PACKETFRAGMENT;
258                         eom = 0;
259                 }
260
261                 packetLen = NET_HEADERSIZE + dataLen;
262
263                 header = (void *)sendbuffer;
264                 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
265                 header[1] = BigLong(conn->sendSequence - 1);
266                 memcpy(sendbuffer + 8, conn->sendMessage, dataLen);
267
268                 conn->sendNext = false;
269
270                 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
271                         return;
272
273                 conn->lastSendTime = realtime;
274                 packetsReSent++;
275         }
276 }
277
278 qboolean NetConn_CanSendMessage(netconn_t *conn)
279 {
280         return conn->canSend;
281 }
282
283 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data)
284 {
285         int packetLen;
286         int *header;
287
288 #ifdef DEBUG
289         if (data->cursize == 0)
290                 Sys_Error("Datagram_SendUnreliableMessage: zero length message\n");
291
292         if (data->cursize > MAX_DATAGRAM)
293                 Sys_Error("Datagram_SendUnreliableMessage: message too big %u\n", data->cursize);
294 #endif
295
296         packetLen = NET_HEADERSIZE + data->cursize;
297
298         header = (void *)sendbuffer;
299         header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
300         header[1] = BigLong(conn->unreliableSendSequence);
301         memcpy(sendbuffer + 8, data->data, data->cursize);
302
303         conn->unreliableSendSequence++;
304
305         if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
306                 return -1;
307
308         packetsSent++;
309         unreliableMessagesSent++;
310         return 1;
311 }
312
313 void NetConn_CloseClientPorts(void)
314 {
315         for (;cl_numsockets > 0;cl_numsockets--)
316                 if (cl_sockets[cl_numsockets - 1])
317                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
318 }
319
320 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
321 {
322         lhnetaddress_t address;
323         lhnetsocket_t *s;
324         char addressstring2[1024];
325         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
326         {
327                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
328                 {
329                         cl_sockets[cl_numsockets++] = s;
330                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
331                         Con_Printf("Client opened a socket on address %s\n", addressstring2);
332                 }
333                 else
334                 {
335                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
336                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
337                 }
338         }
339         else
340                 Con_Printf("Client unable to parse address %s\n", addressstring);
341 }
342
343 void NetConn_OpenClientPorts(void)
344 {
345         int port;
346         NetConn_CloseClientPorts();
347         port = bound(0, cl_netport.integer, 65535);
348         if (cl_netport.integer != port)
349                 Cvar_SetValueQuick(&cl_netport, port);
350         Con_Printf("Client using port %i\n", port);
351         NetConn_OpenClientPort("local", port);
352         NetConn_OpenClientPort(cl_netaddress.string, port);
353         NetConn_OpenClientPort(cl_netaddress_ipv6.string, port);
354 }
355
356 void NetConn_CloseServerPorts(void)
357 {
358         for (;sv_numsockets > 0;sv_numsockets--)
359                 if (sv_sockets[sv_numsockets - 1])
360                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
361 }
362
363 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
364 {
365         lhnetaddress_t address;
366         lhnetsocket_t *s;
367         char addressstring2[1024];
368         if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
369         {
370                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
371                 {
372                         sv_sockets[sv_numsockets++] = s;
373                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
374                         Con_Printf("Server listening on address %s\n", addressstring2);
375                 }
376                 else
377                 {
378                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
379                         Con_Printf("Server failed to open socket on address %s\n", addressstring2);
380                 }
381         }
382         else
383                 Con_Printf("Server unable to parse address %s\n", addressstring);
384 }
385
386 void NetConn_OpenServerPorts(int opennetports)
387 {
388         int port;
389         NetConn_CloseServerPorts();
390         port = bound(0, sv_netport.integer, 65535);
391         if (port == 0)
392                 port = 26000;
393         Con_Printf("Server using port %i\n", port);
394         if (sv_netport.integer != port)
395                 Cvar_SetValueQuick(&sv_netport, port);
396         if (cls.state != ca_dedicated)
397                 NetConn_OpenServerPort("local", port);
398         if (opennetports)
399         {
400                 NetConn_OpenServerPort(sv_netaddress.string, port);
401                 NetConn_OpenServerPort(sv_netaddress_ipv6.string, port);
402         }
403         if (sv_numsockets == 0)
404                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!\n");
405 }
406
407 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
408 {
409         int i, a = LHNETADDRESS_GetAddressType(address);
410         for (i = 0;i < cl_numsockets;i++)
411                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
412                         return cl_sockets[i];
413         return NULL;
414 }
415
416 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
417 {
418         int i, a = LHNETADDRESS_GetAddressType(address);
419         for (i = 0;i < sv_numsockets;i++)
420                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
421                         return sv_sockets[i];
422         return NULL;
423 }
424
425 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
426 {
427         netconn_t *conn;
428         conn = Mem_Alloc(netconn_mempool, sizeof(*conn));
429         conn->mysocket = mysocket;
430         conn->peeraddress = *peeraddress;
431         conn->canSend = true;
432         conn->connecttime = realtime;
433         conn->lastMessageTime = realtime;
434         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
435         // reduce effectiveness of connection request floods
436         conn->timeout = realtime + net_connecttimeout.value;
437         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
438         conn->next = netconn_list;
439         netconn_list = conn;
440         return conn;
441 }
442
443 void NetConn_Close(netconn_t *conn)
444 {
445         netconn_t *c;
446         // remove connection from list
447         if (conn == netconn_list)
448                 netconn_list = conn->next;
449         else
450         {
451                 for (c = netconn_list;c;c = c->next)
452                 {
453                         if (c->next == conn)
454                         {
455                                 c->next = conn->next;
456                                 break;
457                         }
458                 }
459                 // not found in list, we'll avoid crashing here...
460                 if (!c)
461                         return;
462         }
463         // free connection
464         Mem_Free(conn);
465 }
466
467 static int clientport = -1;
468 static int clientport2 = -1;
469 static int hostport = -1;
470 static void NetConn_UpdateServerStuff(void)
471 {
472         if (clientport2 != cl_netport.integer)
473         {
474                 clientport2 = cl_netport.integer;
475                 if (cls.state == ca_connected)
476                         Con_Printf("Changing \"cl_port\" will not take effect until you reconnect.\n");
477         }
478         if (cls.state != ca_dedicated)
479         {
480                 if (cls.state == ca_disconnected && clientport != cl_netport.integer)
481                 {
482                         clientport = cl_netport.integer;
483                         NetConn_CloseClientPorts();
484                 }
485                 if (cl_numsockets == 0)
486                         NetConn_OpenClientPorts();
487         }
488
489         if (hostport != sv_netport.integer)
490         {
491                 hostport = sv_netport.integer;
492                 if (sv.active)
493                         Con_Printf("Changing \"port\" will not take effect until \"map\" command is executed.\n");
494         }
495 }
496
497 int NetConn_ReceivedMessage(netconn_t *conn, qbyte *data, int length)
498 {
499         unsigned int count;
500         unsigned int flags;
501         unsigned int sequence;
502
503         if (length >= 8)
504         {
505                 length = BigLong(((int *)data)[0]);
506                 flags = length & ~NETFLAG_LENGTH_MASK;
507                 length &= NETFLAG_LENGTH_MASK;
508                 // control packets were already handled
509                 if (!(flags & NETFLAG_CTL))
510                 {
511                         sequence = BigLong(((int *)data)[1]);
512                         packetsReceived++;
513                         data += 8;
514                         length -= 8;
515                         if (flags & NETFLAG_UNRELIABLE)
516                         {
517                                 if (sequence >= conn->unreliableReceiveSequence)
518                                 {
519                                         if (sequence > conn->unreliableReceiveSequence)
520                                         {
521                                                 count = sequence - conn->unreliableReceiveSequence;
522                                                 droppedDatagrams += count;
523                                                 Con_DPrintf("Dropped %u datagram(s)\n", count);
524                                         }
525                                         conn->unreliableReceiveSequence = sequence + 1;
526                                         conn->lastMessageTime = realtime;
527                                         conn->timeout = realtime + net_messagetimeout.value;
528                                         unreliableMessagesReceived++;
529                                         if (length > 0)
530                                         {
531                                                 SZ_Clear(&net_message);
532                                                 SZ_Write(&net_message, data, length);
533                                                 MSG_BeginReading();
534                                                 return 2;
535                                         }
536                                 }
537                                 else
538                                         Con_DPrintf("Got a stale datagram\n");
539                                 return 1;
540                         }
541                         else if (flags & NETFLAG_ACK)
542                         {
543                                 if (sequence == (conn->sendSequence - 1))
544                                 {
545                                         if (sequence == conn->ackSequence)
546                                         {
547                                                 conn->ackSequence++;
548                                                 if (conn->ackSequence != conn->sendSequence)
549                                                         Con_DPrintf("ack sequencing error\n");
550                                                 conn->lastMessageTime = realtime;
551                                                 conn->timeout = realtime + net_messagetimeout.value;
552                                                 conn->sendMessageLength -= MAX_PACKETFRAGMENT;
553                                                 if (conn->sendMessageLength > 0)
554                                                 {
555                                                         memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
556                                                         conn->sendNext = true;
557                                                         NetConn_SendMessageNext(conn);
558                                                 }
559                                                 else
560                                                 {
561                                                         conn->sendMessageLength = 0;
562                                                         conn->canSend = true;
563                                                 }
564                                         }
565                                         else
566                                                 Con_DPrintf("Duplicate ACK received\n");
567                                 }
568                                 else
569                                         Con_DPrintf("Stale ACK received\n");
570                                 return 1;
571                         }
572                         else if (flags & NETFLAG_DATA)
573                         {
574                                 unsigned int temppacket[2];
575                                 temppacket[0] = BigLong(8 | NETFLAG_ACK);
576                                 temppacket[1] = BigLong(sequence);
577                                 NetConn_Write(conn->mysocket, (qbyte *)temppacket, 8, &conn->peeraddress);
578                                 if (sequence == conn->receiveSequence)
579                                 {
580                                         conn->lastMessageTime = realtime;
581                                         conn->timeout = realtime + net_messagetimeout.value;
582                                         conn->receiveSequence++;
583                                         memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
584                                         conn->receiveMessageLength += length;
585                                         if (flags & NETFLAG_EOM)
586                                         {
587                                                 reliableMessagesReceived++;
588                                                 length = conn->receiveMessageLength;
589                                                 conn->receiveMessageLength = 0;
590                                                 if (length > 0)
591                                                 {
592                                                         SZ_Clear(&net_message);
593                                                         SZ_Write(&net_message, conn->receiveMessage, length);
594                                                         MSG_BeginReading();
595                                                         return 2;
596                                                 }
597                                         }
598                                 }
599                                 else
600                                         receivedDuplicateCount++;
601                                 return 1;
602                         }
603                 }
604         }
605         return 0;
606 }
607
608 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
609 {
610         cls.netcon = NetConn_Open(mysocket, peeraddress);
611         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
612         key_dest = key_game;
613         m_state = m_none;
614         cls.connect_trying = false;
615         cls.demonum = -1;                       // not in the demo loop now
616         cls.state = ca_connected;
617         cls.signon = 0;                         // need all the signon messages before playing
618         CL_ClearState();
619         Host_Reconnect_f();
620 }
621
622 int NetConn_IsLocalGame(void)
623 {
624         int i;
625         if (cls.state == ca_connected && sv.active/* && LHNETADDRESS_GetAddressType(cl.netcon->peeraddress) == LHNETADDRESSTYPE_LOOP*/)
626         {
627                 // make sure there are no other connected clients
628                 for (i = 1;i < MAX_SCOREBOARD;i++)
629                         if (svs.connectedclients[i])
630                                 return false;
631                 return true;
632         }
633         return false;
634 }
635
636 static struct
637 {
638         double senttime;
639         lhnetaddress_t peeraddress;
640 }
641 pingcache[HOSTCACHESIZE];
642
643 int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
644 {
645         int ret, c, control;
646         lhnetaddress_t svaddress;
647         const char *s;
648         char *string, addressstring2[128], cname[128], ipstring[32];
649         char stringbuf[16384];
650
651         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
652         {
653                 // received a command string - strip off the packaging and put it
654                 // into our string buffer with NULL termination
655                 data += 4;
656                 length -= 4;
657                 length = min(length, (int)sizeof(stringbuf) - 1);
658                 memcpy(stringbuf, data, length);
659                 stringbuf[length] = 0;
660                 string = stringbuf;
661
662                 if (developer.integer)
663                 {
664                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
665                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
666                         Com_HexDumpToConsole(data, length);
667                 }
668
669                 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
670                 {
671                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
672                         Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
673                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\challenge\\%s", string + 10), peeraddress);
674                         return true;
675                 }
676                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
677                 {
678                         NetConn_ConnectionEstablished(mysocket, peeraddress);
679                         return true;
680                 }
681                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
682                 {
683                         cls.connect_trying = false;
684                         string += 7;
685                         length = max(length - 7, (int)sizeof(m_return_reason) - 1);
686                         memcpy(m_return_reason, string, length);
687                         m_return_reason[length] = 0;
688                         Con_Printf("%s\n", m_return_reason);
689                         return true;
690                 }
691                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
692                 {
693                         int i, j, c, n, users, maxusers;
694                         char game[32], mod[32], map[32], name[128];
695                         double pingtime;
696                         hostcache_t temp;
697                         string += 13;
698                         // hostcache only uses text addresses
699                         LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
700                         // search the cache for this server
701                         for (n = 0; n < hostCacheCount; n++)
702                                 if (!strcmp(cname, hostcache[n].cname))
703                                         break;
704                         // add it or update it
705                         if (n == hostCacheCount)
706                         {
707                                 // if cache is full replace highest ping server (the list is
708                                 // kept sorted so this is always the last, and if this server
709                                 // is good it will be sorted into an early part of the list)
710                                 if (hostCacheCount >= HOSTCACHESIZE)
711                                         n = hostCacheCount - 1;
712                                 else
713                                         hostCacheCount++;
714                         }
715                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strncpy(game, s, sizeof(game) - 1);else game[0] = 0;
716                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strncpy(mod , s, sizeof(mod ) - 1);else mod[0] = 0;
717                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strncpy(map , s, sizeof(map ) - 1);else map[0] = 0;
718                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strncpy(name, s, sizeof(name) - 1);else name[0] = 0;
719                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) c = atoi(s);else c = -1;
720                         if ((s = SearchInfostring(string, "clients"      )) != NULL) users = atoi(s);else users = 0;
721                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) maxusers = atoi(s);else maxusers = 0;
722                         pingtime = 9999;
723                         for (i = 0;i < HOSTCACHESIZE;i++)
724                                 if (!LHNETADDRESS_Compare(peeraddress, &pingcache[i].peeraddress))
725                                         pingtime = (int)(realtime - pingcache[i].senttime);
726                         pingtime = bound(0, pingtime, 9999);
727                         memset(&hostcache[n], 0, sizeof(hostcache[n]));
728                         // store the data the engine cares about (address and ping)
729                         strcpy(hostcache[n].cname, cname);
730                         hostcache[n].ping = pingtime;
731                         // build description strings for the things users care about
732                         snprintf(hostcache[n].line1, sizeof(hostcache[n].line1), "%5d%c%3u/%3u %-65.65s", (int)pingtime, c != NET_PROTOCOL_VERSION ? '*' : ' ', users, maxusers, name);
733                         snprintf(hostcache[n].line2, sizeof(hostcache[n].line2), "%-21.21s %-19.19s %-17.17s %-20.20s", cname, game, mod, map);
734                         // if ping is especially high, display it as such
735                         if (pingtime >= 300)
736                         {
737                                 // orange numbers (lower block)
738                                 for (i = 0;i < 5;i++)
739                                         if (hostcache[n].line1[i] != ' ')
740                                                 hostcache[n].line1[i] += 128;
741                         }
742                         else if (pingtime >= 200)
743                         {
744                                 // yellow numbers (in upper block)
745                                 for (i = 0;i < 5;i++)
746                                         if (hostcache[n].line1[i] != ' ')
747                                                 hostcache[n].line1[i] -= 30;
748                         }
749                         // if not in the slist menu we should print the server to console
750                         if (m_state != m_slist)
751                                 Con_Printf("%s\n%s\n", hostcache[n].line1, hostcache[n].line2);
752                         // and finally, re-sort the list
753                         for (i = 0;i < hostCacheCount;i++)
754                         {
755                                 for (j = i + 1;j < hostCacheCount;j++)
756                                 {
757                                         //if (strcmp(hostcache[j].name, hostcache[i].name) < 0)
758                                         if (hostcache[i].ping > hostcache[j].ping)
759                                         {
760                                                 memcpy(&temp, &hostcache[j], sizeof(hostcache_t));
761                                                 memcpy(&hostcache[j], &hostcache[i], sizeof(hostcache_t));
762                                                 memcpy(&hostcache[i], &temp, sizeof(hostcache_t));
763                                         }
764                                 }
765                         }
766                         return true;
767                 }
768                 if (!strncmp(string, "getserversResponse\\", 19) && hostCacheCount < HOSTCACHESIZE)
769                 {
770                         int i, best;
771                         double besttime;
772                         // Extract the IP addresses
773                         data += 18;
774                         length -= 18;
775                         while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
776                         {
777                                 sprintf(ipstring, "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], (data[5] << 8) | data[6]);
778                                 if (developer.integer)
779                                         Con_Printf("Requesting info from server %s\n", ipstring);
780                                 LHNETADDRESS_FromString(&svaddress, ipstring, 0);
781                                 NetConn_WriteString(mysocket, "\377\377\377\377getinfo", &svaddress);
782                                 // replace oldest or matching entry in ping cache
783                                 // we scan this later when getting a reply to see how long it took
784                                 besttime = realtime;
785                                 best = 0;
786                                 for (i = 0;i < HOSTCACHESIZE;i++)
787                                 {
788                                         if (!LHNETADDRESS_Compare(&svaddress, &pingcache[i].peeraddress))
789                                         {
790                                                 best = i;
791                                                 break;
792                                         }
793                                         if (besttime > pingcache[i].senttime)
794                                         {
795                                                 besttime = pingcache[i].senttime;
796                                                 best = i;
797                                                 // if ping cache isn't full yet we can skip out early
798                                                 if (!besttime)
799                                                         break;
800                                         }
801                                 }
802                                 pingcache[best].peeraddress = svaddress;
803                                 pingcache[best].senttime = realtime;
804                                 // move on to next address in packet
805                                 data += 7;
806                                 length -= 7;
807                         }
808                         return true;
809                 }
810                 /*
811                 if (!strncmp(string, "ping", 4))
812                 {
813                         if (developer.integer)
814                                 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
815                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
816                         return true;
817                 }
818                 if (!strncmp(string, "ack", 3))
819                         return true;
820                 */
821                 // we may not have liked the packet, but it was a command packet, so
822                 // we're done processing this packet now
823                 return true;
824         }
825         // netquake control packets, supported for compatibility only
826         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
827         {
828                 c = data[4];
829                 data += 5;
830                 length -= 5;
831                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
832                 switch (c)
833                 {
834                 case CCREP_ACCEPT:
835                         if (developer.integer)
836                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
837                         if (cls.connect_trying)
838                         {
839                                 lhnetaddress_t clientportaddress;
840                                 clientportaddress = *peeraddress;
841                                 if (length >= 4)
842                                 {
843                                         unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
844                                         data += 4;
845                                         length -= 4;
846                                         LHNETADDRESS_SetPort(&clientportaddress, port);
847                                 }
848                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress);
849                         }
850                         break;
851                 case CCREP_REJECT:
852                         if (developer.integer)
853                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
854                         Con_Printf("%s\n", data);
855                         strncpy(m_return_reason, data, sizeof(m_return_reason) - 1);
856                         break;
857 #if 0
858                 case CCREP_SERVER_INFO:
859                         if (developer.integer)
860                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
861                         if (cls.state != ca_dedicated)
862                         {
863                                 // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address
864                                 // string we just ignore it and keep the real address
865                                 MSG_ReadString();
866                                 // hostcache only uses text addresses
867                                 cname = UDP_AddrToString(readaddr);
868                                 // search the cache for this server
869                                 for (n = 0; n < hostCacheCount; n++)
870                                         if (!strcmp(cname, hostcache[n].cname))
871                                                 break;
872                                 // add it
873                                 if (n == hostCacheCount && hostCacheCount < HOSTCACHESIZE)
874                                 {
875                                         hostCacheCount++;
876                                         memset(&hostcache[n], 0, sizeof(hostcache[n]));
877                                         strcpy(hostcache[n].name, MSG_ReadString());
878                                         strcpy(hostcache[n].map, MSG_ReadString());
879                                         hostcache[n].users = MSG_ReadByte();
880                                         hostcache[n].maxusers = MSG_ReadByte();
881                                         c = MSG_ReadByte();
882                                         if (c != NET_PROTOCOL_VERSION)
883                                         {
884                                                 strncpy(hostcache[n].cname, hostcache[n].name, sizeof(hostcache[n].cname) - 1);
885                                                 hostcache[n].cname[sizeof(hostcache[n].cname) - 1] = 0;
886                                                 strcpy(hostcache[n].name, "*");
887                                                 strncat(hostcache[n].name, hostcache[n].cname, sizeof(hostcache[n].name) - 1);
888                                                 hostcache[n].name[sizeof(hostcache[n].name) - 1] = 0;
889                                         }
890                                         strcpy(hostcache[n].cname, cname);
891                                 }
892                         }
893                         break;
894                 case CCREP_PLAYER_INFO:
895                         // we got a CCREP_PLAYER_INFO??
896                         //if (developer.integer)
897                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
898                         break;
899                 case CCREP_RULE_INFO:
900                         // we got a CCREP_RULE_INFO??
901                         //if (developer.integer)
902                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
903                         break;
904 #endif
905                 default:
906                         break;
907                 }
908                 // we may not have liked the packet, but it was a valid control
909                 // packet, so we're done processing this packet now
910                 return true;
911         }
912         ret = 0;
913         if (length >= (int)NET_HEADERSIZE && cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress) && (ret = NetConn_ReceivedMessage(cls.netcon, data, length)) == 2)
914                 CL_ParseServerMessage();
915         return ret;
916 }
917
918 void NetConn_ClientFrame(void)
919 {
920         int i, length;
921         lhnetaddress_t peeraddress;
922         netconn_t *conn;
923         NetConn_UpdateServerStuff();
924         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
925         {
926                 if (cls.connect_remainingtries == 0)
927                 {
928                         cls.connect_trying = false;
929                         Host_Error("Connect failed\n");
930                         return;
931                 }
932                 if (cls.connect_nextsendtime)
933                         Con_Printf("Still trying...\n");
934                 else
935                         Con_Printf("Trying...\n");
936                 cls.connect_nextsendtime = realtime + 1;
937                 cls.connect_remainingtries--;
938                 // try challenge first (newer server)
939                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
940                 // then try netquake as a fallback (old server, or netquake)
941                 SZ_Clear(&net_message);
942                 // save space for the header, filled in later
943                 MSG_WriteLong(&net_message, 0);
944                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
945                 MSG_WriteString(&net_message, "QUAKE");
946                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
947                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
948                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
949                 SZ_Clear(&net_message);
950         }
951         for (i = 0;i < cl_numsockets;i++)
952                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
953                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
954         if (cls.netcon && realtime > cls.netcon->timeout)
955         {
956                 Con_Printf("Connection timed out\n");
957                 CL_Disconnect();
958         }
959         for (conn = netconn_list;conn;conn = conn->next)
960                 NetConn_ReSendMessage(conn);
961 }
962
963 #define MAX_CHALLENGES 128
964 struct
965 {
966         lhnetaddress_t address;
967         double time;
968         char string[12];
969 }
970 challenge[MAX_CHALLENGES];
971
972 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
973 {
974         int i;
975         char c;
976         for (i = 0;i < bufferlength - 1;i++)
977         {
978                 do
979                 {
980                         c = rand () % (127 - 33) + 33;
981                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
982                 buffer[i] = c;
983         }
984         buffer[i] = 0;
985 }
986
987 extern void SV_ConnectClient(int clientnum, netconn_t *netconnection);
988 int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
989 {
990         int i, n, ret, clientnum, responselength, best, clientcount;
991         double besttime;
992         client_t *client;
993         netconn_t *conn;
994         char *s, *string, response[512], addressstring2[128], stringbuf[16384];
995
996         if (sv.active)
997         {
998                 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
999                 {
1000                         // received a command string - strip off the packaging and put it
1001                         // into our string buffer with NULL termination
1002                         data += 4;
1003                         length -= 4;
1004                         length = min(length, (int)sizeof(stringbuf) - 1);
1005                         memcpy(stringbuf, data, length);
1006                         stringbuf[length] = 0;
1007                         string = stringbuf;
1008
1009                         if (developer.integer)
1010                         {
1011                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1012                                 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1013                                 Com_HexDumpToConsole(data, length);
1014                         }
1015
1016                         if (length >= 12 && !memcmp(string, "getchallenge", 12))
1017                         {
1018                                 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1019                                 {
1020                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1021                                                 break;
1022                                         if (besttime > challenge[i].time)
1023                                                 besttime = challenge[best = i].time;
1024                                 }
1025                                 // if we did not find an exact match, choose the oldest and
1026                                 // update address and string
1027                                 if (i == MAX_CHALLENGES)
1028                                 {
1029                                         i = best;
1030                                         challenge[i].address = *peeraddress;
1031                                         NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1032                                 }
1033                                 challenge[i].time = realtime;
1034                                 // send the challenge
1035                                 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1036                                 return true;
1037                         }
1038                         if (length > 8 && !memcmp(string, "connect\\", 8))
1039                         {
1040                                 string += 7;
1041                                 length -= 7;
1042                                 if ((s = SearchInfostring(string, "challenge")))
1043                                 {
1044                                         // validate the challenge
1045                                         for (i = 0;i < MAX_CHALLENGES;i++)
1046                                                 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1047                                                         break;
1048                                         if (i < MAX_CHALLENGES)
1049                                         {
1050                                                 // check engine protocol
1051                                                 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1052                                                 {
1053                                                         if (developer.integer)
1054                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1055                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1056                                                 }
1057                                                 else
1058                                                 {
1059                                                         // see if this is a duplicate connection request
1060                                                         for (clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1061                                                                 if ((client = svs.connectedclients[clientnum]) && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1062                                                                         break;
1063                                                         if (clientnum < MAX_SCOREBOARD)
1064                                                         {
1065                                                                 // duplicate connection request
1066                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1067                                                                 {
1068                                                                         // client is still trying to connect,
1069                                                                         // so we send a duplicate reply
1070                                                                         if (developer.integer)
1071                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1072                                                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1073                                                                 }
1074                                                                 // only kick if old connection seems dead
1075                                                                 if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1076                                                                 {
1077                                                                         // kick off connection and await retry
1078                                                                         client->deadsocket = true;
1079                                                                 }
1080                                                         }
1081                                                         else
1082                                                         {
1083                                                                 // this is a new client, find a slot
1084                                                                 for (clientcount = 0, clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1085                                                                         if (svs.connectedclients[clientnum])
1086                                                                                 clientcount++;
1087                                                                 for (clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1088                                                                         if (!svs.connectedclients[clientnum])
1089                                                                                 break;
1090                                                                 if (clientcount < max(1, sv_maxplayers.integer) && clientnum < MAX_SCOREBOARD)
1091                                                                 {
1092                                                                         // allocate and prepare the client struct
1093                                                                         if ((client = Mem_Alloc(sv_clients_mempool, sizeof(client_t))))
1094                                                                         {
1095                                                                                 if ((client->entitydatabase4 = EntityFrame4_AllocDatabase(sv_clients_mempool)))
1096                                                                                 {
1097                                                                                         if ((conn = NetConn_Open(mysocket, peeraddress)))
1098                                                                                         {
1099                                                                                                 // allocated connection
1100                                                                                                 LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true);
1101                                                                                                 if (developer.integer)
1102                                                                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1103                                                                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1104                                                                                                 // now set up the client struct
1105                                                                                                 svs.connectedclients[clientnum] = client;
1106                                                                                                 SV_ConnectClient(clientnum, conn);
1107                                                                                                 NetConn_Heartbeat(1);
1108                                                                                         }
1109                                                                                         else
1110                                                                                         {
1111                                                                                                 EntityFrame4_FreeDatabase(client->entitydatabase4);
1112                                                                                                 Mem_Free(client);
1113                                                                                         }
1114                                                                                 }
1115                                                                                 else
1116                                                                                         Mem_Free(client);
1117                                                                         }
1118                                                                 }
1119                                                                 else
1120                                                                 {
1121                                                                         // server is full
1122                                                                         if (developer.integer)
1123                                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1124                                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1125                                                                 }
1126                                                         }
1127                                                 }
1128                                         }
1129                                 }
1130                                 return true;
1131                         }
1132                         if (length >= 7 && !memcmp(string, "getinfo", 7))
1133                         {
1134                                 const char *challenge = NULL;
1135                                 // If there was a challenge in the getinfo message
1136                                 if (length > 8 && string[7] == ' ')
1137                                         challenge = string + 8;
1138                                 for (i = 0, n = 0;i < MAX_SCOREBOARD;i++)
1139                                         if (svs.connectedclients[i])
1140                                                 n++;
1141                                 responselength = snprintf(response, sizeof(response), "\377\377\377\377infoResponse\x0A"
1142                                                         "\\gamename\\%s\\modname\\%s\\sv_maxclients\\%d"
1143                                                         "\\clients\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d%s%s",
1144                                                         gamename, com_modname, min(sv_maxplayers.integer, MAX_SCOREBOARD), n,
1145                                                         sv.name, hostname.string, NET_PROTOCOL_VERSION, challenge ? "\\challenge\\" : "", challenge ? challenge : "");
1146                                 // does it fit in the buffer?
1147                                 if (responselength < (int)sizeof(response))
1148                                 {
1149                                         if (developer.integer)
1150                                                 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1151                                         NetConn_WriteString(mysocket, response, peeraddress);
1152                                 }
1153                                 return true;
1154                         }
1155                         /*
1156                         if (!strncmp(string, "ping", 4))
1157                         {
1158                                 if (developer.integer)
1159                                         Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1160                                 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1161                                 return true;
1162                         }
1163                         if (!strncmp(string, "ack", 3))
1164                                 return true;
1165                         */
1166                         // we may not have liked the packet, but it was a command packet, so
1167                         // we're done processing this packet now
1168                         return true;
1169                 }
1170                 // LordHavoc: disabled netquake control packet support in server
1171 #if 0
1172                 {
1173                         int c, control;
1174                         // netquake control packets, supported for compatibility only
1175                         if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1176                         {
1177                                 c = data[4];
1178                                 data += 5;
1179                                 length -= 5;
1180                                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1181                                 switch (c)
1182                                 {
1183                                 case CCREQ_CONNECT:
1184                                         //if (developer.integer)
1185                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
1186                                         if (length >= (int)strlen("QUAKE") + 1 + 1)
1187                                         {
1188                                                 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
1189                                                 {
1190                                                         if (developer.integer)
1191                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
1192                                                         SZ_Clear(&net_message);
1193                                                         // save space for the header, filled in later
1194                                                         MSG_WriteLong(&net_message, 0);
1195                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1196                                                         MSG_WriteString(&net_message, "Incompatible version.\n");
1197                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1198                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1199                                                         SZ_Clear(&net_message);
1200                                                 }
1201                                                 else
1202                                                 {
1203                                                         // see if this is a duplicate connection request
1204                                                         for (clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1205                                                                 if ((client = svs.connectedclients[clientnum]) && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1206                                                                         break;
1207                                                         if (clientnum < MAX_SCOREBOARD)
1208                                                         {
1209                                                                 // duplicate connection request
1210                                                                 if (realtime - client->netconnection->connecttime < 2.0)
1211                                                                 {
1212                                                                         // client is still trying to connect,
1213                                                                         // so we send a duplicate reply
1214                                                                         if (developer.integer)
1215                                                                                 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
1216                                                                         SZ_Clear(&net_message);
1217                                                                         // save space for the header, filled in later
1218                                                                         MSG_WriteLong(&net_message, 0);
1219                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1220                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
1221                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1222                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1223                                                                         SZ_Clear(&net_message);
1224                                                                 }
1225                                                                 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1226                                                                 {
1227                                                                         // the old client hasn't sent us anything
1228                                                                         // in quite a while, so kick off and let
1229                                                                         // the retry take care of it...
1230                                                                         client->deadsocket = true;
1231                                                                 }
1232                                                         }
1233                                                         else
1234                                                         {
1235                                                                 // this is a new client, find a slot
1236                                                                 for (clientnum = 0;clientnum < MAX_SCOREBOARD;clientnum++)
1237                                                                         if (!(client = svs.connectedclients[clientnum]))
1238                                                                                 break;
1239                                                                 // WARNING: this is broken code
1240                                                                 if (clientnum < MAX_SCOREBOARD && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
1241                                                                 {
1242                                                                         // connect to the client
1243                                                                         // everything is allocated, just fill in the details
1244                                                                         strcpy(conn->address, addressstring2);
1245                                                                         if (developer.integer)
1246                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
1247                                                                         // send back the info about the server connection
1248                                                                         SZ_Clear(&net_message);
1249                                                                         // save space for the header, filled in later
1250                                                                         MSG_WriteLong(&net_message, 0);
1251                                                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1252                                                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
1253                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1254                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1255                                                                         SZ_Clear(&net_message);
1256                                                                         // now set up the client struct
1257                                                                         SV_ConnectClient(clientnum, conn);
1258                                                                         NetConn_Heartbeat(1);
1259                                                                 }
1260                                                                 else
1261                                                                 {
1262                                                                         //if (developer.integer)
1263                                                                                 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
1264                                                                         // no room; try to let player know
1265                                                                         SZ_Clear(&net_message);
1266                                                                         // save space for the header, filled in later
1267                                                                         MSG_WriteLong(&net_message, 0);
1268                                                                         MSG_WriteByte(&net_message, CCREP_REJECT);
1269                                                                         MSG_WriteString(&net_message, "Server is full.\n");
1270                                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1271                                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1272                                                                         SZ_Clear(&net_message);
1273                                                                 }
1274                                                         }
1275                                                 }
1276                                         }
1277                                         break;
1278 #if 0
1279                                 case CCREQ_SERVER_INFO:
1280                                         if (developer.integer)
1281                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
1282                                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
1283                                         {
1284                                                 if (developer.integer)
1285                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
1286                                                 SZ_Clear(&net_message);
1287                                                 // save space for the header, filled in later
1288                                                 MSG_WriteLong(&net_message, 0);
1289                                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
1290                                                 UDP_GetSocketAddr(UDP_acceptSock, &newaddr);
1291                                                 MSG_WriteString(&net_message, UDP_AddrToString(&newaddr));
1292                                                 MSG_WriteString(&net_message, hostname.string);
1293                                                 MSG_WriteString(&net_message, sv.name);
1294                                                 MSG_WriteByte(&net_message, net_activeconnections);
1295                                                 MSG_WriteByte(&net_message, min(sv_maxplayers.integer, MAX_SCOREBOARD));
1296                                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1297                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1298                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1299                                                 SZ_Clear(&net_message);
1300                                         }
1301                                         break;
1302                                 case CCREQ_PLAYER_INFO:
1303                                         if (developer.integer)
1304                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
1305                                         if (sv.active)
1306                                         {
1307                                                 int playerNumber, activeNumber, clientNumber;
1308                                                 client_t *client;
1309
1310                                                 playerNumber = MSG_ReadByte();
1311                                                 activeNumber = -1;
1312                                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
1313                                                         if (client->active && ++activeNumber == playerNumber)
1314                                                                 break;
1315                                                 if (clientNumber != svs.maxclients)
1316                                                 {
1317                                                         SZ_Clear(&net_message);
1318                                                         // save space for the header, filled in later
1319                                                         MSG_WriteLong(&net_message, 0);
1320                                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
1321                                                         MSG_WriteByte(&net_message, playerNumber);
1322                                                         MSG_WriteString(&net_message, client->name);
1323                                                         MSG_WriteLong(&net_message, client->colors);
1324                                                         MSG_WriteLong(&net_message, (int)client->edict->v->frags);
1325                                                         MSG_WriteLong(&net_message, (int)(realtime - client->netconnection->connecttime));
1326                                                         MSG_WriteString(&net_message, client->netconnection->address);
1327                                                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1328                                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1329                                                         SZ_Clear(&net_message);
1330                                                 }
1331                                         }
1332                                         break;
1333                                 case CCREQ_RULE_INFO:
1334                                         if (developer.integer)
1335                                                 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
1336                                         if (sv.active)
1337                                         {
1338                                                 char *prevCvarName;
1339                                                 cvar_t *var;
1340
1341                                                 // find the search start location
1342                                                 prevCvarName = MSG_ReadString();
1343                                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
1344
1345                                                 // send the response
1346                                                 SZ_Clear(&net_message);
1347                                                 // save space for the header, filled in later
1348                                                 MSG_WriteLong(&net_message, 0);
1349                                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
1350                                                 if (var)
1351                                                 {
1352                                                         MSG_WriteString(&net_message, var->name);
1353                                                         MSG_WriteString(&net_message, var->string);
1354                                                 }
1355                                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1356                                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1357                                                 SZ_Clear(&net_message);
1358                                         }
1359                                         break;
1360 #endif
1361                                 default:
1362                                         break;
1363                                 }
1364                                 // we may not have liked the packet, but it was a valid control
1365                                 // packet, so we're done processing this packet now
1366                                 return true;
1367                         }
1368                 }
1369 #endif
1370                 for (i = 0;i < MAX_SCOREBOARD;i++)
1371                 {
1372                         if ((host_client = svs.connectedclients[i]))
1373                         {
1374                                 if (host_client->netconnection)
1375                                 {
1376                                         if (host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1377                                         {
1378                                                 sv_player = host_client->edict;
1379                                                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length)) == 2)
1380                                                         SV_ReadClientMessage();
1381                                                 return ret;
1382                                         }
1383                                 }
1384                                 else
1385                                 {
1386                                         Con_Printf("Removing client with no netconnection!\n");
1387                                         SV_DropClient(true);
1388                                 }
1389                         }
1390                 }
1391         }
1392         return 0;
1393 }
1394
1395 void NetConn_ServerFrame(void)
1396 {
1397         int i, length;
1398         lhnetaddress_t peeraddress;
1399         netconn_t *conn;
1400         NetConn_UpdateServerStuff();
1401         for (i = 0;i < sv_numsockets;i++)
1402                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1403                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
1404         for (i = 0;i < MAX_SCOREBOARD;i++)
1405         {
1406                 if ((host_client = svs.connectedclients[i]) && realtime > host_client->netconnection->timeout)
1407                 {
1408                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
1409                         sv_player = host_client->edict;
1410                         SV_DropClient(false);
1411                 }
1412         }
1413         for (conn = netconn_list;conn;conn = conn->next)
1414                 NetConn_ReSendMessage(conn);
1415 }
1416
1417 void NetConn_QueryMasters(void)
1418 {
1419         int i;
1420         int masternum;
1421         lhnetaddress_t masteraddress;
1422         char request[256];
1423
1424         if (hostCacheCount >= HOSTCACHESIZE)
1425                 return;
1426
1427         for (i = 0;i < cl_numsockets;i++)
1428         {
1429                 if (cl_sockets[i])
1430                 {
1431 #if 0
1432                         // search LAN
1433 #if 1
1434                         UDP_Broadcast(UDP_controlSock, "\377\377\377\377getinfo", 11);
1435 #else
1436                         SZ_Clear(&net_message);
1437                         // save space for the header, filled in later
1438                         MSG_WriteLong(&net_message, 0);
1439                         MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
1440                         MSG_WriteString(&net_message, "QUAKE");
1441                         MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1442                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1443                         UDP_Broadcast(UDP_controlSock, net_message.data, net_message.cursize);
1444                         SZ_Clear(&net_message);
1445 #endif
1446 #endif
1447
1448                         // build the getservers
1449                         snprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
1450
1451                         // search internet
1452                         for (masternum = 0;sv_masters[masternum].name;masternum++)
1453                                 if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
1454                                         NetConn_WriteString(cl_sockets[i], request, &masteraddress);
1455                 }
1456         }
1457 }
1458
1459 void NetConn_Heartbeat(int priority)
1460 {
1461         lhnetaddress_t masteraddress;
1462         int masternum;
1463         lhnetsocket_t *mysocket;
1464
1465         // if it's a state change (client connected), limit next heartbeat to no
1466         // more than 30 sec in the future
1467         if (priority == 1 && nextheartbeattime > realtime + 30.0)
1468                 nextheartbeattime = realtime + 30.0;
1469
1470         // limit heartbeatperiod to 30 to 270 second range,
1471         // lower limit is to avoid abusing master servers with excess traffic,
1472         // upper limit is to avoid timing out on the master server (which uses
1473         // 300 sec timeout)
1474         if (sv_heartbeatperiod.value < 30)
1475                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
1476         if (sv_heartbeatperiod.value > 270)
1477                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
1478
1479         // make advertising optional and don't advertise singleplayer games, and
1480         // only send a heartbeat as often as the admin wants
1481         if (sv.active && sv_public.integer && (!cl.islocalgame || sv_maxplayers.integer >= 2) && (priority > 1 || realtime > nextheartbeattime))
1482         {
1483                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
1484                 for (masternum = 0;sv_masters[masternum].name;masternum++)
1485                         if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
1486                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
1487         }
1488 }
1489
1490 int NetConn_SendToAll(sizebuf_t *data, double blocktime)
1491 {
1492         int i, count = 0;
1493         qbyte sent[MAX_SCOREBOARD];
1494
1495         memset(sent, 0, sizeof(sent));
1496
1497         // simultaneously wait for the first CanSendMessage and send the message,
1498         // then wait for a second CanSendMessage (verifying it was received), or
1499         // the client drops and is no longer counted
1500         // the loop aborts when either it runs out of clients to send to, or a
1501         // timeout expires
1502         blocktime += Sys_DoubleTime();
1503         do
1504         {
1505                 count = 0;
1506                 NetConn_ClientFrame();
1507                 NetConn_ServerFrame();
1508                 for (i = 0;i < MAX_SCOREBOARD;i++)
1509                 {
1510                         if ((host_client = svs.connectedclients[i]))
1511                         {
1512                                 if (NetConn_CanSendMessage(host_client->netconnection))
1513                                 {
1514                                         if (!sent[i])
1515                                                 NetConn_SendReliableMessage(host_client->netconnection, data);
1516                                         sent[i] = true;
1517                                 }
1518                                 if (!NetConn_CanSendMessage(host_client->netconnection))
1519                                         count++;
1520                         }
1521                 }
1522         }
1523         while (count && Sys_DoubleTime() < blocktime);
1524         return count;
1525 }
1526
1527 static void Net_Heartbeat_f(void)
1528 {
1529         NetConn_Heartbeat(2);
1530 }
1531
1532 void PrintStats(netconn_t *conn)
1533 {
1534         Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, conn->canSend, conn->sendSequence, conn->receiveSequence);
1535 }
1536
1537 void Net_Stats_f(void)
1538 {
1539         netconn_t *conn;
1540         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
1541         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
1542         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
1543         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
1544         Con_Printf("packetsSent                = %i\n", packetsSent);
1545         Con_Printf("packetsReSent              = %i\n", packetsReSent);
1546         Con_Printf("packetsReceived            = %i\n", packetsReceived);
1547         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
1548         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
1549         Con_Printf("connections                =\n");
1550         for (conn = netconn_list;conn;conn = conn->next)
1551                 PrintStats(conn);
1552 }
1553
1554 void Net_Slist_f(void)
1555 {
1556         hostCacheCount = 0;
1557         memset(&pingcache, 0, sizeof(pingcache));
1558         if (m_state != m_slist)
1559                 Con_Printf("Sending requests to master servers\n");
1560         NetConn_QueryMasters();
1561         if (m_state != m_slist)
1562                 Con_Printf("Listening for replies...\n");
1563 }
1564
1565 void NetConn_Init(void)
1566 {
1567         int i;
1568         lhnetaddress_t tempaddress;
1569         netconn_mempool = Mem_AllocPool("Networking");
1570         Cmd_AddCommand("net_stats", Net_Stats_f);
1571         Cmd_AddCommand("net_slist", Net_Slist_f);
1572         Cmd_AddCommand("heartbeat", Net_Heartbeat_f);
1573         Cvar_RegisterVariable(&net_messagetimeout);
1574         Cvar_RegisterVariable(&net_messagerejointimeout);
1575         Cvar_RegisterVariable(&net_connecttimeout);
1576         Cvar_RegisterVariable(&cl_fakelocalping_min);
1577         Cvar_RegisterVariable(&cl_fakelocalping_max);
1578         Cvar_RegisterVariable(&cl_fakepacketloss_receive);
1579         Cvar_RegisterVariable(&cl_fakepacketloss_send);
1580         Cvar_RegisterVariable(&sv_fakepacketloss_receive);
1581         Cvar_RegisterVariable(&sv_fakepacketloss_send);
1582         Cvar_RegisterVariable(&hostname);
1583         Cvar_RegisterVariable(&developer_networking);
1584         Cvar_RegisterVariable(&cl_netport);
1585         Cvar_RegisterVariable(&cl_netaddress);
1586         Cvar_RegisterVariable(&cl_netaddress_ipv6);
1587         Cvar_RegisterVariable(&sv_netport);
1588         Cvar_RegisterVariable(&sv_netaddress);
1589         Cvar_RegisterVariable(&sv_netaddress_ipv6);
1590         Cvar_RegisterVariable(&sv_public);
1591         Cvar_RegisterVariable(&sv_heartbeatperiod);
1592         for (i = 0;sv_masters[i].name;i++)
1593                 Cvar_RegisterVariable(&sv_masters[i]);
1594         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
1595         {
1596                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
1597                 {
1598                         Con_Printf("-ip option used, setting cl_netaddress and sv_netaddress to address \"%s\"\n");
1599                         Cvar_SetQuick(&cl_netaddress, com_argv[i + 1]);
1600                         Cvar_SetQuick(&sv_netaddress, com_argv[i + 1]);
1601                 }
1602                 else
1603                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
1604         }
1605         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
1606         {
1607                 i = atoi(com_argv[i + 1]);
1608                 if (i >= 0 && i < 65536)
1609                 {
1610                         Con_Printf("-port option used, setting port cvar to %i\n", i);
1611                         Cvar_SetValueQuick(&sv_netport, i);
1612                 }
1613                 else
1614                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
1615         }
1616         cl_numsockets = 0;
1617         sv_numsockets = 0;
1618         memset(&pingcache, 0, sizeof(pingcache));
1619         SZ_Alloc(&net_message, NET_MAXMESSAGE, "net_message");
1620         LHNET_Init();
1621 }
1622
1623 void NetConn_Shutdown(void)
1624 {
1625         NetConn_CloseClientPorts();
1626         NetConn_CloseServerPorts();
1627         LHNET_Shutdown();
1628 }
1629