2 Copyright (C) 1996-1997 Id Software, Inc.
3 Copyright (C) 2002 Mathieu Olivier
4 Copyright (C) 2003 Forest Hale
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.
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.
15 See the GNU General Public License for more details.
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.
26 #define MASTER_PORT 27950
28 cvar_t sv_public = {0, "sv_public", "1"};
29 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "180"};
31 // FIXME: resolve DNS on masters whenever their value changes and cache it (to avoid major delays in active servers when they heartbeat)
32 static cvar_t sv_masters [] =
34 {CVAR_SAVE, "sv_master1", ""},
35 {CVAR_SAVE, "sv_master2", ""},
36 {CVAR_SAVE, "sv_master3", ""},
37 {CVAR_SAVE, "sv_master4", ""},
38 {0, "sv_masterextra1", "69.59.212.88"}, // ghdigital.com
39 {0, "sv_masterextra2", "66.169.205.13"}, // dpmaster.deathmask.net
40 {0, "sv_masterextra3", "12.166.196.192"}, // blaze.mindphukd.org
44 static double nextheartbeattime = 0;
46 sizebuf_t net_message;
47 static qbyte net_message_buf[NET_MAXMESSAGE];
49 cvar_t net_messagetimeout = {0, "net_messagetimeout","300"};
50 cvar_t net_messagerejointimeout = {0, "net_messagerejointimeout","10"};
51 cvar_t net_connecttimeout = {0, "net_connecttimeout","10"};
52 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED"};
53 cvar_t developer_networking = {0, "developer_networking", "0"};
55 cvar_t cl_netlocalping = {0, "cl_netlocalping","0"};
56 static cvar_t cl_netpacketloss = {0, "cl_netpacketloss","0"};
59 /* statistic counters */
60 static int packetsSent = 0;
61 static int packetsReSent = 0;
62 static int packetsReceived = 0;
63 static int receivedDuplicateCount = 0;
64 static int droppedDatagrams = 0;
66 static int unreliableMessagesSent = 0;
67 static int unreliableMessagesReceived = 0;
68 static int reliableMessagesSent = 0;
69 static int reliableMessagesReceived = 0;
71 double masterquerytime = -1000;
72 int masterquerycount = 0;
73 int masterreplycount = 0;
74 int serverquerycount = 0;
75 int serverreplycount = 0;
77 static qbyte sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
78 static qbyte readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
81 lhnetsocket_t *cl_sockets[16];
83 lhnetsocket_t *sv_sockets[16];
85 netconn_t *netconn_list = NULL;
86 mempool_t *netconn_mempool = NULL;
88 cvar_t cl_netport = {0, "cl_port", "0"};
89 cvar_t sv_netport = {0, "port", "26000"};
90 cvar_t net_address = {0, "net_address", "0.0.0.0"};
91 //cvar_t net_netaddress_ipv6 = {0, "net_address_ipv6", "[0:0:0:0:0:0:0:0]"};
93 // ServerList interface
94 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
95 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
97 serverlist_infofield_t serverlist_sortbyfield;
98 qboolean serverlist_sortdescending;
100 int serverlist_viewcount = 0;
101 serverlist_entry_t *serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
103 int serverlist_cachecount;
104 serverlist_entry_t serverlist_cache[SERVERLIST_TOTALSIZE];
106 qboolean serverlist_consoleoutput;
108 // helper function to insert a value into the viewset
109 // spare entries will be removed
110 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
113 if( serverlist_viewcount == SERVERLIST_VIEWLISTSIZE )
116 for( i = serverlist_viewcount ; i > index ; i-- )
117 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
119 serverlist_viewlist[index] = entry;
120 serverlist_viewcount++;
123 // we suppose serverlist_viewcount to be valid, ie > 0
124 static void _ServerList_ViewList_Helper_Remove( int index )
126 serverlist_viewcount--;
127 for( ; index < serverlist_viewcount ; index++ )
128 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
131 // returns true if A should be inserted before B
132 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
134 int result = 0; // > 0 if for numbers A > B and for text if A < B
136 switch( serverlist_sortbyfield ) {
138 result = A->info.ping - B->info.ping;
140 case SLIF_MAXPLAYERS:
141 result = A->info.maxplayers - B->info.maxplayers;
143 case SLIF_NUMPLAYERS:
144 result = A->info.numplayers - B->info.numplayers;
147 result = A->info.protocol - B->info.protocol;
150 result = strcmp( B->info.cname, A->info.cname );
153 result = strcmp( B->info.game, A->info.game );
156 result = strcmp( B->info.map, A->info.map );
159 result = strcmp( B->info.mod, A->info.mod );
162 result = strcmp( B->info.name, A->info.name );
165 Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
169 if( serverlist_sortdescending )
174 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
176 // This should actually be done with some intermediate and end-of-function return
188 case SLMO_GREATEREQUAL:
191 Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
196 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
198 // Same here, also using an intermediate & final return would be more appropriate
202 return *B && !!strstr( A, B ); // we want a real bool
203 case SLMO_NOTCONTAIN:
204 return !*B || !strstr( A, B );
206 return strcmp( A, B ) < 0;
208 return strcmp( A, B ) <= 0;
210 return strcmp( A, B ) == 0;
212 return strcmp( A, B ) > 0;
214 return strcmp( A, B ) != 0;
215 case SLMO_GREATEREQUAL:
216 return strcmp( A, B ) >= 0;
218 Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
223 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
225 if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
227 if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
229 if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
231 if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
233 if( *mask->info.cname
234 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
237 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
240 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
243 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
246 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
251 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
255 if( serverlist_viewcount == SERVERLIST_VIEWLISTSIZE )
258 // now check whether it passes through the masks
259 for( start = 0 ; serverlist_andmasks[start].active && start < SERVERLIST_ANDMASKCOUNT ; start++ )
260 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
263 for( start = 0 ; serverlist_ormasks[start].active && start < SERVERLIST_ORMASKCOUNT ; start++ )
264 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
266 if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
269 if( !serverlist_viewcount ) {
270 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
273 // ok, insert it, we just need to find out where exactly:
276 // check whether to insert it as new first item
277 if( _ServerList_Entry_Compare( entry, serverlist_viewlist[0] ) ) {
278 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
280 } // check whether to insert it as new last item
281 else if( !_ServerList_Entry_Compare( entry, serverlist_viewlist[serverlist_viewcount - 1] ) ) {
282 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
286 end = serverlist_viewcount - 1;
287 while( end > start + 1 )
289 mid = (start + end) / 2;
290 // test the item that lies in the middle between start and end
291 if( _ServerList_Entry_Compare( entry, serverlist_viewlist[mid] ) )
292 // the item has to be in the upper half
295 // the item has to be in the lower half
298 _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
301 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
304 for( i = 0; i < serverlist_viewcount; i++ )
306 if (serverlist_viewlist[i] == entry)
308 _ServerList_ViewList_Helper_Remove(i);
314 void ServerList_RebuildViewList(void)
318 serverlist_viewcount = 0;
319 for( i = 0 ; i < serverlist_cachecount ; i++ )
320 if( serverlist_cache[i].finished )
321 ServerList_ViewList_Insert( &serverlist_cache[i] );
324 void ServerList_ResetMasks(void)
326 memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
327 memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
331 static void _ServerList_Test(void)
334 for( i = 0 ; i < 1024 ; i++ ) {
335 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_t ) );
336 serverlist_cache[serverlist_cachecount].info.ping = rand() % 450 + 250;
337 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, 128, "Black's ServerList Test %i", i );
338 serverlist_cache[serverlist_cachecount].finished = true;
339 sprintf( serverlist_cache[serverlist_cachecount].line1, "%i %s", serverlist_cache[serverlist_cachecount].info.ping, serverlist_cache[serverlist_cachecount].info.name );
340 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
341 serverlist_cachecount++;
346 void ServerList_QueryList(void)
348 masterquerytime = realtime;
349 masterquerycount = 0;
350 masterreplycount = 0;
351 serverquerycount = 0;
352 serverreplycount = 0;
353 serverlist_cachecount = 0;
354 serverlist_viewcount = 0;
355 serverlist_consoleoutput = false;
356 NetConn_QueryMasters();
358 //_ServerList_Test();
363 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
365 int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
369 if (cl_netpacketloss.integer)
370 for (i = 0;i < cl_numsockets;i++)
371 if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer)
373 if (developer_networking.integer)
375 char addressstring[128], addressstring2[128];
376 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
379 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
380 Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", mysocket, addressstring, data, maxlength, peeraddress, length, addressstring2);
381 Com_HexDumpToConsole(data, length);
384 Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", mysocket, addressstring, data, maxlength, peeraddress, length);
389 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
393 if (cl_netpacketloss.integer)
394 for (i = 0;i < cl_numsockets;i++)
395 if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss.integer)
397 ret = LHNET_Write(mysocket, data, length, peeraddress);
398 if (developer_networking.integer)
400 char addressstring[128], addressstring2[128];
401 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
402 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
403 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", mysocket, addressstring, data, length, peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
404 Com_HexDumpToConsole(data, length);
409 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
411 // note this does not include the trailing NULL because we add that in the parser
412 return NetConn_Write(mysocket, string, strlen(string), peeraddress);
415 int NetConn_SendReliableMessage(netconn_t *conn, sizebuf_t *data)
417 unsigned int packetLen;
418 unsigned int dataLen;
420 unsigned int *header;
423 if (data->cursize == 0)
424 Sys_Error("Datagram_SendMessage: zero length message\n");
426 if (data->cursize > (int)sizeof(conn->sendMessage))
427 Sys_Error("Datagram_SendMessage: message too big (%u > %u)\n", data->cursize, sizeof(conn->sendMessage));
429 if (conn->canSend == false)
430 Sys_Error("SendMessage: called with canSend == false\n");
433 memcpy(conn->sendMessage, data->data, data->cursize);
434 conn->sendMessageLength = data->cursize;
436 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
438 dataLen = conn->sendMessageLength;
443 dataLen = MAX_PACKETFRAGMENT;
447 packetLen = NET_HEADERSIZE + dataLen;
449 header = (void *)sendbuffer;
450 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
451 header[1] = BigLong(conn->sendSequence);
452 memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
454 conn->sendSequence++;
455 conn->canSend = false;
457 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
460 conn->lastSendTime = realtime;
462 reliableMessagesSent++;
466 static void NetConn_SendMessageNext(netconn_t *conn)
468 unsigned int packetLen;
469 unsigned int dataLen;
471 unsigned int *header;
473 if (conn->sendMessageLength && !conn->canSend && conn->sendNext)
475 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
477 dataLen = conn->sendMessageLength;
482 dataLen = MAX_PACKETFRAGMENT;
486 packetLen = NET_HEADERSIZE + dataLen;
488 header = (void *)sendbuffer;
489 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
490 header[1] = BigLong(conn->sendSequence);
491 memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
493 conn->sendSequence++;
494 conn->sendNext = false;
496 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
499 conn->lastSendTime = realtime;
504 static void NetConn_ReSendMessage(netconn_t *conn)
506 unsigned int packetLen;
507 unsigned int dataLen;
509 unsigned int *header;
511 if (conn->sendMessageLength && !conn->canSend && (realtime - conn->lastSendTime) > 1.0)
513 if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
515 dataLen = conn->sendMessageLength;
520 dataLen = MAX_PACKETFRAGMENT;
524 packetLen = NET_HEADERSIZE + dataLen;
526 header = (void *)sendbuffer;
527 header[0] = BigLong(packetLen | (NETFLAG_DATA | eom));
528 header[1] = BigLong(conn->sendSequence - 1);
529 memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
531 conn->sendNext = false;
533 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
536 conn->lastSendTime = realtime;
541 qboolean NetConn_CanSendMessage(netconn_t *conn)
543 return conn->canSend;
546 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data)
551 packetLen = NET_HEADERSIZE + data->cursize;
554 if (data->cursize == 0)
555 Sys_Error("Datagram_SendUnreliableMessage: zero length message\n");
557 if (packetLen > (int)sizeof(sendbuffer))
558 Sys_Error("Datagram_SendUnreliableMessage: message too big %u\n", data->cursize);
561 header = (void *)sendbuffer;
562 header[0] = BigLong(packetLen | NETFLAG_UNRELIABLE);
563 header[1] = BigLong(conn->unreliableSendSequence);
564 memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
566 conn->unreliableSendSequence++;
568 if (NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress) != (int)packetLen)
572 unreliableMessagesSent++;
576 void NetConn_CloseClientPorts(void)
578 for (;cl_numsockets > 0;cl_numsockets--)
579 if (cl_sockets[cl_numsockets - 1])
580 LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
583 void NetConn_OpenClientPort(const char *addressstring, int defaultport)
585 lhnetaddress_t address;
587 char addressstring2[1024];
588 if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
590 if ((s = LHNET_OpenSocket_Connectionless(&address)))
592 cl_sockets[cl_numsockets++] = s;
593 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
594 Con_Printf("Client opened a socket on address %s\n", addressstring2);
598 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
599 Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
603 Con_Printf("Client unable to parse address %s\n", addressstring);
606 void NetConn_OpenClientPorts(void)
609 NetConn_CloseClientPorts();
610 port = bound(0, cl_netport.integer, 65535);
611 if (cl_netport.integer != port)
612 Cvar_SetValueQuick(&cl_netport, port);
613 Con_Printf("Client using port %i\n", port);
614 NetConn_OpenClientPort("local:2", 0);
615 NetConn_OpenClientPort(net_address.string, port);
616 //NetConn_OpenClientPort(net_address_ipv6.string, port);
619 void NetConn_CloseServerPorts(void)
621 for (;sv_numsockets > 0;sv_numsockets--)
622 if (sv_sockets[sv_numsockets - 1])
623 LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
626 void NetConn_OpenServerPort(const char *addressstring, int defaultport)
628 lhnetaddress_t address;
630 char addressstring2[1024];
631 if (LHNETADDRESS_FromString(&address, addressstring, defaultport))
633 if ((s = LHNET_OpenSocket_Connectionless(&address)))
635 sv_sockets[sv_numsockets++] = s;
636 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
637 Con_Printf("Server listening on address %s\n", addressstring2);
641 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
642 Con_Printf("Server failed to open socket on address %s\n", addressstring2);
646 Con_Printf("Server unable to parse address %s\n", addressstring);
649 void NetConn_OpenServerPorts(int opennetports)
652 NetConn_CloseServerPorts();
653 port = bound(0, sv_netport.integer, 65535);
656 Con_Printf("Server using port %i\n", port);
657 if (sv_netport.integer != port)
658 Cvar_SetValueQuick(&sv_netport, port);
659 if (cls.state != ca_dedicated)
660 NetConn_OpenServerPort("local:1", 0);
663 NetConn_OpenServerPort(net_address.string, port);
664 //NetConn_OpenServerPort(net_address_ipv6.string, port);
666 if (sv_numsockets == 0)
667 Host_Error("NetConn_OpenServerPorts: unable to open any ports!\n");
670 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
672 int i, a = LHNETADDRESS_GetAddressType(address);
673 for (i = 0;i < cl_numsockets;i++)
674 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
675 return cl_sockets[i];
679 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
681 int i, a = LHNETADDRESS_GetAddressType(address);
682 for (i = 0;i < sv_numsockets;i++)
683 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
684 return sv_sockets[i];
688 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
691 conn = Mem_Alloc(netconn_mempool, sizeof(*conn));
692 conn->mysocket = mysocket;
693 conn->peeraddress = *peeraddress;
694 conn->canSend = true;
695 conn->lastMessageTime = realtime;
696 // LordHavoc: (inspired by ProQuake) use a short connect timeout to
697 // reduce effectiveness of connection request floods
698 conn->timeout = realtime + net_connecttimeout.value;
699 LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
700 conn->next = netconn_list;
705 void NetConn_Close(netconn_t *conn)
708 // remove connection from list
709 if (conn == netconn_list)
710 netconn_list = conn->next;
713 for (c = netconn_list;c;c = c->next)
717 c->next = conn->next;
721 // not found in list, we'll avoid crashing here...
729 static int clientport = -1;
730 static int clientport2 = -1;
731 static int hostport = -1;
732 static void NetConn_UpdateServerStuff(void)
734 if (cls.state != ca_dedicated)
736 if (clientport2 != cl_netport.integer)
738 clientport2 = cl_netport.integer;
739 if (cls.state == ca_connected)
740 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
742 if (cls.state == ca_disconnected && clientport != clientport2)
744 clientport = clientport2;
745 NetConn_CloseClientPorts();
747 if (cl_numsockets == 0)
748 NetConn_OpenClientPorts();
751 if (hostport != sv_netport.integer)
753 hostport = sv_netport.integer;
755 Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
759 int NetConn_ReceivedMessage(netconn_t *conn, qbyte *data, int length)
763 unsigned int sequence;
767 length = BigLong(((int *)data)[0]);
768 flags = length & ~NETFLAG_LENGTH_MASK;
769 length &= NETFLAG_LENGTH_MASK;
770 // control packets were already handled
771 if (!(flags & NETFLAG_CTL))
773 sequence = BigLong(((int *)data)[1]);
777 if (flags & NETFLAG_UNRELIABLE)
779 if (sequence >= conn->unreliableReceiveSequence)
781 if (sequence > conn->unreliableReceiveSequence)
783 count = sequence - conn->unreliableReceiveSequence;
784 droppedDatagrams += count;
785 Con_DPrintf("Dropped %u datagram(s)\n", count);
787 conn->unreliableReceiveSequence = sequence + 1;
788 conn->lastMessageTime = realtime;
789 conn->timeout = realtime + net_messagetimeout.value;
790 unreliableMessagesReceived++;
793 SZ_Clear(&net_message);
794 SZ_Write(&net_message, data, length);
800 Con_DPrint("Got a stale datagram\n");
803 else if (flags & NETFLAG_ACK)
805 if (sequence == (conn->sendSequence - 1))
807 if (sequence == conn->ackSequence)
810 if (conn->ackSequence != conn->sendSequence)
811 Con_DPrint("ack sequencing error\n");
812 conn->lastMessageTime = realtime;
813 conn->timeout = realtime + net_messagetimeout.value;
814 conn->sendMessageLength -= MAX_PACKETFRAGMENT;
815 if (conn->sendMessageLength > 0)
817 memcpy(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
818 conn->sendNext = true;
819 NetConn_SendMessageNext(conn);
823 conn->sendMessageLength = 0;
824 conn->canSend = true;
828 Con_DPrint("Duplicate ACK received\n");
831 Con_DPrint("Stale ACK received\n");
834 else if (flags & NETFLAG_DATA)
836 unsigned int temppacket[2];
837 temppacket[0] = BigLong(8 | NETFLAG_ACK);
838 temppacket[1] = BigLong(sequence);
839 NetConn_Write(conn->mysocket, (qbyte *)temppacket, 8, &conn->peeraddress);
840 if (sequence == conn->receiveSequence)
842 conn->lastMessageTime = realtime;
843 conn->timeout = realtime + net_messagetimeout.value;
844 conn->receiveSequence++;
845 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
846 conn->receiveMessageLength += length;
847 if (flags & NETFLAG_EOM)
849 reliableMessagesReceived++;
850 length = conn->receiveMessageLength;
851 conn->receiveMessageLength = 0;
854 SZ_Clear(&net_message);
855 SZ_Write(&net_message, conn->receiveMessage, length);
862 receivedDuplicateCount++;
870 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
872 cls.connect_trying = false;
873 M_Update_Return_Reason("");
874 // the connection request succeeded, stop current connection and set up a new connection
876 cls.netcon = NetConn_Open(mysocket, peeraddress);
877 Con_Printf("Connection accepted to %s\n", cls.netcon->address);
880 cls.demonum = -1; // not in the demo loop now
881 cls.state = ca_connected;
882 cls.signon = 0; // need all the signon messages before playing
885 int NetConn_IsLocalGame(void)
887 if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
892 int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
895 lhnetaddress_t svaddress;
897 char *string, addressstring2[128], cname[128], ipstring[32];
898 char stringbuf[16384];
900 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
902 // received a command string - strip off the packaging and put it
903 // into our string buffer with NULL termination
906 length = min(length, (int)sizeof(stringbuf) - 1);
907 memcpy(stringbuf, data, length);
908 stringbuf[length] = 0;
911 if (developer.integer)
913 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
914 Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
915 Com_HexDumpToConsole(data, length);
918 if (length > 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
920 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
921 Con_Printf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
922 M_Update_Return_Reason("Got challenge response");
923 NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\challenge\\%s", string + 10), peeraddress);
926 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
928 M_Update_Return_Reason("Accepted");
929 NetConn_ConnectionEstablished(mysocket, peeraddress);
932 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
934 char rejectreason[32];
935 cls.connect_trying = false;
937 length = max(length - 7, (int)sizeof(rejectreason) - 1);
938 memcpy(rejectreason, string, length);
939 rejectreason[length] = 0;
940 M_Update_Return_Reason(rejectreason);
943 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
945 serverlist_info_t *info;
950 // serverlist only uses text addresses
951 LHNETADDRESS_ToString(peeraddress, cname, sizeof(cname), true);
952 // search the cache for this server and update it
953 for( n = 0; n < serverlist_cachecount; n++ )
954 if( !strcmp( cname, serverlist_cache[n].info.cname ) )
956 if( n == serverlist_cachecount )
959 info = &serverlist_cache[n].info;
960 if ((s = SearchInfostring(string, "gamename" )) != NULL) strlcpy(info->game, s, sizeof (info->game));else info->game[0] = 0;
961 if ((s = SearchInfostring(string, "modname" )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0] = 0;
962 if ((s = SearchInfostring(string, "mapname" )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0] = 0;
963 if ((s = SearchInfostring(string, "hostname" )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
964 if ((s = SearchInfostring(string, "protocol" )) != NULL) info->protocol = atoi(s);else info->protocol = -1;
965 if ((s = SearchInfostring(string, "clients" )) != NULL) info->numplayers = atoi(s);else info->numplayers = 0;
966 if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);else info->maxplayers = 0;
968 if (info->ping == 100000)
971 pingtime = (int)((realtime - serverlist_cache[n].querytime) * 1000.0);
972 pingtime = bound(0, pingtime, 9999);
974 info->ping = pingtime;
976 // legacy/old stuff move it to the menu ASAP
978 // build description strings for the things users care about
979 dpsnprintf(serverlist_cache[n].line1, sizeof(serverlist_cache[n].line1), "%5d%c%3u/%3u %-65.65s", (int)pingtime, info->protocol != NET_PROTOCOL_VERSION ? '*' : ' ', info->numplayers, info->maxplayers, info->name);
980 dpsnprintf(serverlist_cache[n].line2, sizeof(serverlist_cache[n].line2), "%-21.21s %-19.19s %-17.17s %-20.20s", info->cname, info->game, info->mod, info->map);
981 // if ping is especially high, display it as such
984 // orange numbers (lower block)
985 for (i = 0;i < 5;i++)
986 if (serverlist_cache[n].line1[i] != ' ')
987 serverlist_cache[n].line1[i] += 128;
989 else if (pingtime >= 200)
991 // yellow numbers (in upper block)
992 for (i = 0;i < 5;i++)
993 if (serverlist_cache[n].line1[i] != ' ')
994 serverlist_cache[n].line1[i] -= 30;
996 // and finally, update the view set
997 if( serverlist_cache[n].finished )
998 ServerList_ViewList_Remove( &serverlist_cache[n] );
999 // else if not in the slist menu we should print the server to console (if wanted)
1000 else if( serverlist_consoleoutput )
1001 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1002 ServerList_ViewList_Insert( &serverlist_cache[n] );
1003 serverlist_cache[n].finished = true;
1007 if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1009 // Extract the IP addresses
1013 if (serverlist_consoleoutput)
1014 Con_Print("received server list...\n");
1015 while (length >= 7 && data[0] == '\\' && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF) && data[5] * 256 + data[6] != 0)
1019 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[1], data[2], data[3], data[4], (data[5] << 8) | data[6]);
1020 if (developer.integer)
1021 Con_Printf("Requesting info from server %s\n", ipstring);
1022 // ignore the rest of the message if the serverlist is full
1023 if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1025 // also ignore it if we have already queried it (other master server response)
1026 for( n = 0 ; n < serverlist_cachecount ; n++ )
1027 if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1029 if( n >= serverlist_cachecount )
1033 LHNETADDRESS_FromString(&svaddress, ipstring, 0);
1034 NetConn_WriteString(mysocket, "\377\377\377\377getinfo", &svaddress);
1036 memset(&serverlist_cache[serverlist_cachecount], 0, sizeof(serverlist_cache[serverlist_cachecount]));
1037 // store the data the engine cares about (address and ping)
1038 strlcpy (serverlist_cache[serverlist_cachecount].info.cname, ipstring, sizeof (serverlist_cache[serverlist_cachecount].info.cname));
1039 serverlist_cache[serverlist_cachecount].info.ping = 100000;
1040 serverlist_cache[serverlist_cachecount].querytime = realtime;
1041 // if not in the slist menu we should print the server to console
1042 if (serverlist_consoleoutput)
1043 Con_Printf("querying %s\n", ipstring);
1045 ++serverlist_cachecount;
1048 // move on to next address in packet
1055 if (!strncmp(string, "ping", 4))
1057 if (developer.integer)
1058 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1059 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1062 if (!strncmp(string, "ack", 3))
1065 // we may not have liked the packet, but it was a command packet, so
1066 // we're done processing this packet now
1069 // netquake control packets, supported for compatibility only
1070 if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1075 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1079 if (developer.integer)
1080 Con_Printf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
1081 if (cls.connect_trying)
1083 lhnetaddress_t clientportaddress;
1084 clientportaddress = *peeraddress;
1087 unsigned int port = (data[0] << 0) | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
1090 LHNETADDRESS_SetPort(&clientportaddress, port);
1092 M_Update_Return_Reason("Accepted");
1093 NetConn_ConnectionEstablished(mysocket, &clientportaddress);
1097 if (developer.integer)
1098 Con_Printf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
1099 cls.connect_trying = false;
1100 M_Update_Return_Reason(data);
1103 case CCREP_SERVER_INFO:
1104 if (developer.integer)
1105 Con_Printf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
1106 if (cls.state != ca_dedicated)
1108 // LordHavoc: because the UDP driver reports 0.0.0.0:26000 as the address
1109 // string we just ignore it and keep the real address
1111 // serverlist only uses text addresses
1112 cname = UDP_AddrToString(readaddr);
1113 // search the cache for this server
1114 for (n = 0; n < hostCacheCount; n++)
1115 if (!strcmp(cname, serverlist[n].cname))
1118 if (n == hostCacheCount && hostCacheCount < SERVERLISTSIZE)
1121 memset(&serverlist[n], 0, sizeof(serverlist[n]));
1122 strlcpy (serverlist[n].name, MSG_ReadString(), sizeof (serverlist[n].name));
1123 strlcpy (serverlist[n].map, MSG_ReadString(), sizeof (serverlist[n].map));
1124 serverlist[n].users = MSG_ReadByte();
1125 serverlist[n].maxusers = MSG_ReadByte();
1127 if (c != NET_PROTOCOL_VERSION)
1129 strlcpy (serverlist[n].cname, serverlist[n].name, sizeof (serverlist[n].cname));
1130 strcpy(serverlist[n].name, "*");
1131 strlcat (serverlist[n].name, serverlist[n].cname, sizeof(serverlist[n].name));
1133 strlcpy (serverlist[n].cname, cname, sizeof (serverlist[n].cname));
1137 case CCREP_PLAYER_INFO:
1138 // we got a CCREP_PLAYER_INFO??
1139 //if (developer.integer)
1140 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
1142 case CCREP_RULE_INFO:
1143 // we got a CCREP_RULE_INFO??
1144 //if (developer.integer)
1145 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
1151 // we may not have liked the packet, but it was a valid control
1152 // packet, so we're done processing this packet now
1156 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)
1157 CL_ParseServerMessage();
1161 void NetConn_ClientFrame(void)
1164 lhnetaddress_t peeraddress;
1166 NetConn_UpdateServerStuff();
1167 if (cls.connect_trying && cls.connect_nextsendtime < realtime)
1169 if (cls.connect_remainingtries == 0)
1170 M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
1171 cls.connect_nextsendtime = realtime + 1;
1172 cls.connect_remainingtries--;
1173 if (cls.connect_remainingtries <= -10)
1175 cls.connect_trying = false;
1176 M_Update_Return_Reason("Connect: Failed");
1179 // try challenge first (newer server)
1180 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
1181 // then try netquake as a fallback (old server, or netquake)
1182 SZ_Clear(&net_message);
1183 // save space for the header, filled in later
1184 MSG_WriteLong(&net_message, 0);
1185 MSG_WriteByte(&net_message, CCREQ_CONNECT);
1186 MSG_WriteString(&net_message, "QUAKE");
1187 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1188 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1189 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
1190 SZ_Clear(&net_message);
1192 for (i = 0;i < cl_numsockets;i++)
1193 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1194 NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
1195 if (cls.netcon && realtime > cls.netcon->timeout)
1197 Con_Print("Connection timed out\n");
1199 Host_ShutdownServer (false);
1201 for (conn = netconn_list;conn;conn = conn->next)
1202 NetConn_ReSendMessage(conn);
1205 #define MAX_CHALLENGES 128
1208 lhnetaddress_t address;
1212 challenge[MAX_CHALLENGES];
1214 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
1218 for (i = 0;i < bufferlength - 1;i++)
1222 c = rand () % (127 - 33) + 33;
1223 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
1229 int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, qbyte *data, int length, lhnetaddress_t *peeraddress)
1231 int i, n, ret, clientnum, responselength, best;
1235 char *s, *string, response[512], addressstring2[128], stringbuf[16384];
1239 if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1241 // received a command string - strip off the packaging and put it
1242 // into our string buffer with NULL termination
1245 length = min(length, (int)sizeof(stringbuf) - 1);
1246 memcpy(stringbuf, data, length);
1247 stringbuf[length] = 0;
1250 if (developer.integer)
1252 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1253 Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
1254 Com_HexDumpToConsole(data, length);
1257 if (length >= 12 && !memcmp(string, "getchallenge", 12))
1259 for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
1261 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
1263 if (besttime > challenge[i].time)
1264 besttime = challenge[best = i].time;
1266 // if we did not find an exact match, choose the oldest and
1267 // update address and string
1268 if (i == MAX_CHALLENGES)
1271 challenge[i].address = *peeraddress;
1272 NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
1274 challenge[i].time = realtime;
1275 // send the challenge
1276 NetConn_WriteString(mysocket, va("\377\377\377\377challenge %s", challenge[i].string), peeraddress);
1279 if (length > 8 && !memcmp(string, "connect\\", 8))
1283 if ((s = SearchInfostring(string, "challenge")))
1285 // validate the challenge
1286 for (i = 0;i < MAX_CHALLENGES;i++)
1287 if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
1289 if (i < MAX_CHALLENGES)
1291 // check engine protocol
1292 if (strcmp(SearchInfostring(string, "protocol"), "darkplaces 3"))
1294 if (developer.integer)
1295 Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
1296 NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
1300 // see if this is a duplicate connection request
1301 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1302 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1304 if (clientnum < svs.maxclients)
1306 // duplicate connection request
1307 if (realtime - client->connecttime < 2.0)
1309 // client is still trying to connect,
1310 // so we send a duplicate reply
1311 if (developer.integer)
1312 Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
1313 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1315 // only kick if old connection seems dead
1316 if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1318 // kick off connection and await retry
1319 client->deadsocket = true;
1324 // this is a new client, find a slot
1325 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1326 if (!client->active)
1328 if (clientnum < svs.maxclients)
1330 // prepare the client struct
1331 if ((conn = NetConn_Open(mysocket, peeraddress)))
1333 // allocated connection
1334 LHNETADDRESS_ToString(peeraddress, conn->address, sizeof(conn->address), true);
1335 if (developer.integer)
1336 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
1337 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
1338 // now set up the client
1339 SV_ConnectClient(clientnum, conn);
1340 NetConn_Heartbeat(1);
1346 if (developer.integer)
1347 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
1348 NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
1356 if (length >= 7 && !memcmp(string, "getinfo", 7))
1358 const char *challenge = NULL;
1359 // If there was a challenge in the getinfo message
1360 if (length > 8 && string[7] == ' ')
1361 challenge = string + 8;
1362 for (i = 0, n = 0;i < svs.maxclients;i++)
1363 if (svs.clients[i].active)
1365 responselength = dpsnprintf(response, sizeof(response), "\377\377\377\377infoResponse\x0A"
1366 "\\gamename\\%s\\modname\\%s\\sv_maxclients\\%d"
1367 "\\clients\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d%s%s",
1368 gamename, com_modname, svs.maxclients, n,
1369 sv.name, hostname.string, NET_PROTOCOL_VERSION, challenge ? "\\challenge\\" : "", challenge ? challenge : "");
1370 // does it fit in the buffer?
1371 if (responselength >= 0)
1373 if (developer.integer)
1374 Con_Printf("Sending reply to master %s - %s\n", addressstring2, response);
1375 NetConn_WriteString(mysocket, response, peeraddress);
1380 if (!strncmp(string, "ping", 4))
1382 if (developer.integer)
1383 Con_Printf("Received ping from %s, sending ack\n", UDP_AddrToString(readaddr));
1384 NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1387 if (!strncmp(string, "ack", 3))
1390 // we may not have liked the packet, but it was a command packet, so
1391 // we're done processing this packet now
1394 // LordHavoc: disabled netquake control packet support in server
1398 // netquake control packets, supported for compatibility only
1399 if (length >= 5 && (control = BigLong(*((int *)data))) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length)
1404 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1408 //if (developer.integer)
1409 Con_Printf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
1410 if (length >= (int)strlen("QUAKE") + 1 + 1)
1412 if (memcmp(data, "QUAKE", strlen("QUAKE") + 1) != 0 || (int)data[strlen("QUAKE") + 1] != NET_PROTOCOL_VERSION)
1414 if (developer.integer)
1415 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
1416 SZ_Clear(&net_message);
1417 // save space for the header, filled in later
1418 MSG_WriteLong(&net_message, 0);
1419 MSG_WriteByte(&net_message, CCREP_REJECT);
1420 MSG_WriteString(&net_message, "Incompatible version.\n");
1421 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1422 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1423 SZ_Clear(&net_message);
1427 // see if this is a duplicate connection request
1428 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1429 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
1431 if (clientnum < svs.maxclients)
1433 // duplicate connection request
1434 if (realtime - client->connecttime < 2.0)
1436 // client is still trying to connect,
1437 // so we send a duplicate reply
1438 if (developer.integer)
1439 Con_Printf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
1440 SZ_Clear(&net_message);
1441 // save space for the header, filled in later
1442 MSG_WriteLong(&net_message, 0);
1443 MSG_WriteByte(&net_message, CCREP_ACCEPT);
1444 MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
1445 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1446 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1447 SZ_Clear(&net_message);
1449 else if (realtime - client->netconnection->lastMessageTime >= net_messagerejointimeout.value)
1451 // the old client hasn't sent us anything
1452 // in quite a while, so kick off and let
1453 // the retry take care of it...
1454 client->deadsocket = true;
1459 // this is a new client, find a slot
1460 for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
1461 if (!client->active)
1463 if (clientnum < svs.maxclients && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
1465 // connect to the client
1466 // everything is allocated, just fill in the details
1467 strlcpy (conn->address, addressstring2, sizeof (conn->address));
1468 if (developer.integer)
1469 Con_Printf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
1470 // send back the info about the server connection
1471 SZ_Clear(&net_message);
1472 // save space for the header, filled in later
1473 MSG_WriteLong(&net_message, 0);
1474 MSG_WriteByte(&net_message, CCREP_ACCEPT);
1475 MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
1476 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1477 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1478 SZ_Clear(&net_message);
1479 // now set up the client struct
1480 SV_ConnectClient(clientnum, conn);
1481 NetConn_Heartbeat(1);
1485 //if (developer.integer)
1486 Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
1487 // no room; try to let player know
1488 SZ_Clear(&net_message);
1489 // save space for the header, filled in later
1490 MSG_WriteLong(&net_message, 0);
1491 MSG_WriteByte(&net_message, CCREP_REJECT);
1492 MSG_WriteString(&net_message, "Server is full.\n");
1493 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1494 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1495 SZ_Clear(&net_message);
1502 case CCREQ_SERVER_INFO:
1503 if (developer.integer)
1504 Con_Printf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
1505 if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
1507 if (developer.integer)
1508 Con_Printf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
1509 SZ_Clear(&net_message);
1510 // save space for the header, filled in later
1511 MSG_WriteLong(&net_message, 0);
1512 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
1513 UDP_GetSocketAddr(UDP_acceptSock, &newaddr);
1514 MSG_WriteString(&net_message, UDP_AddrToString(&newaddr));
1515 MSG_WriteString(&net_message, hostname.string);
1516 MSG_WriteString(&net_message, sv.name);
1517 MSG_WriteByte(&net_message, net_activeconnections);
1518 MSG_WriteByte(&net_message, svs.maxclients);
1519 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1520 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1521 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1522 SZ_Clear(&net_message);
1525 case CCREQ_PLAYER_INFO:
1526 if (developer.integer)
1527 Con_Printf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
1530 int playerNumber, activeNumber, clientNumber;
1533 playerNumber = MSG_ReadByte();
1535 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
1536 if (client->active && ++activeNumber == playerNumber)
1538 if (clientNumber != svs.maxclients)
1540 SZ_Clear(&net_message);
1541 // save space for the header, filled in later
1542 MSG_WriteLong(&net_message, 0);
1543 MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
1544 MSG_WriteByte(&net_message, playerNumber);
1545 MSG_WriteString(&net_message, client->name);
1546 MSG_WriteLong(&net_message, client->colors);
1547 MSG_WriteLong(&net_message, (int)client->edict->v->frags);
1548 MSG_WriteLong(&net_message, (int)(realtime - client->connecttime));
1549 MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient");
1550 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1551 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1552 SZ_Clear(&net_message);
1556 case CCREQ_RULE_INFO:
1557 if (developer.integer)
1558 Con_Printf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
1564 // find the search start location
1565 prevCvarName = MSG_ReadString();
1566 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
1568 // send the response
1569 SZ_Clear(&net_message);
1570 // save space for the header, filled in later
1571 MSG_WriteLong(&net_message, 0);
1572 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
1575 MSG_WriteString(&net_message, var->name);
1576 MSG_WriteString(&net_message, var->string);
1578 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1579 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
1580 SZ_Clear(&net_message);
1587 // we may not have liked the packet, but it was a valid control
1588 // packet, so we're done processing this packet now
1593 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1595 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
1597 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length)) == 2)
1598 SV_ReadClientMessage();
1606 void NetConn_ServerFrame(void)
1609 lhnetaddress_t peeraddress;
1611 NetConn_UpdateServerStuff();
1612 for (i = 0;i < sv_numsockets;i++)
1613 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
1614 NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
1615 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1617 // never timeout loopback connections
1618 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
1620 Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
1621 SV_DropClient(false);
1624 for (conn = netconn_list;conn;conn = conn->next)
1625 NetConn_ReSendMessage(conn);
1628 void NetConn_QueryMasters(void)
1632 lhnetaddress_t masteraddress;
1633 lhnetaddress_t broadcastaddress;
1636 if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
1639 // 26000 is the default quake server port, servers on other ports will not
1641 // note this is IPv4-only, I doubt there are IPv6-only LANs out there
1642 LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
1644 for (i = 0;i < cl_numsockets;i++)
1648 // search LAN for Quake servers
1649 SZ_Clear(&net_message);
1650 // save space for the header, filled in later
1651 MSG_WriteLong(&net_message, 0);
1652 MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
1653 MSG_WriteString(&net_message, "QUAKE");
1654 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1655 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1656 NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress);
1657 SZ_Clear(&net_message);
1659 // search LAN for DarkPlaces servers
1660 NetConn_WriteString(cl_sockets[i], "\377\377\377\377getinfo", &broadcastaddress);
1662 // build the getservers message to send to the master servers
1663 dpsnprintf(request, sizeof(request), "\377\377\377\377getservers %s %u empty full\x0A", gamename, NET_PROTOCOL_VERSION);
1666 for (masternum = 0;sv_masters[masternum].name;masternum++)
1668 if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
1671 NetConn_WriteString(cl_sockets[i], request, &masteraddress);
1676 if (!masterquerycount)
1678 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
1679 M_Update_Return_Reason("No network");
1683 void NetConn_Heartbeat(int priority)
1685 lhnetaddress_t masteraddress;
1687 lhnetsocket_t *mysocket;
1689 // if it's a state change (client connected), limit next heartbeat to no
1690 // more than 30 sec in the future
1691 if (priority == 1 && nextheartbeattime > realtime + 30.0)
1692 nextheartbeattime = realtime + 30.0;
1694 // limit heartbeatperiod to 30 to 270 second range,
1695 // lower limit is to avoid abusing master servers with excess traffic,
1696 // upper limit is to avoid timing out on the master server (which uses
1698 if (sv_heartbeatperiod.value < 30)
1699 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
1700 if (sv_heartbeatperiod.value > 270)
1701 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
1703 // make advertising optional and don't advertise singleplayer games, and
1704 // only send a heartbeat as often as the admin wants
1705 if (sv.active && sv_public.integer && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
1707 nextheartbeattime = realtime + sv_heartbeatperiod.value;
1708 for (masternum = 0;sv_masters[masternum].name;masternum++)
1709 if (sv_masters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, MASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
1710 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
1714 int NetConn_SendToAll(sizebuf_t *data, double blocktime)
1717 qbyte sent[MAX_SCOREBOARD];
1719 memset(sent, 0, sizeof(sent));
1721 // simultaneously wait for the first CanSendMessage and send the message,
1722 // then wait for a second CanSendMessage (verifying it was received), or
1723 // the client drops and is no longer counted
1724 // the loop aborts when either it runs out of clients to send to, or a
1726 blocktime += Sys_DoubleTime();
1730 NetConn_ClientFrame();
1731 NetConn_ServerFrame();
1732 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
1734 if (host_client->netconnection)
1736 if (NetConn_CanSendMessage(host_client->netconnection))
1739 NetConn_SendReliableMessage(host_client->netconnection, data);
1742 if (!NetConn_CanSendMessage(host_client->netconnection))
1747 while (count && Sys_DoubleTime() < blocktime);
1751 static void Net_Heartbeat_f(void)
1754 NetConn_Heartbeat(2);
1756 Con_Print("No server running, can not heartbeat to master server.\n");
1759 void PrintStats(netconn_t *conn)
1761 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, conn->canSend, conn->sendSequence, conn->receiveSequence);
1764 void Net_Stats_f(void)
1767 Con_Printf("unreliable messages sent = %i\n", unreliableMessagesSent);
1768 Con_Printf("unreliable messages recv = %i\n", unreliableMessagesReceived);
1769 Con_Printf("reliable messages sent = %i\n", reliableMessagesSent);
1770 Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
1771 Con_Printf("packetsSent = %i\n", packetsSent);
1772 Con_Printf("packetsReSent = %i\n", packetsReSent);
1773 Con_Printf("packetsReceived = %i\n", packetsReceived);
1774 Con_Printf("receivedDuplicateCount = %i\n", receivedDuplicateCount);
1775 Con_Printf("droppedDatagrams = %i\n", droppedDatagrams);
1776 Con_Print("connections =\n");
1777 for (conn = netconn_list;conn;conn = conn->next)
1781 void Net_Slist_f(void)
1783 ServerList_ResetMasks();
1784 serverlist_sortbyfield = SLIF_PING;
1785 serverlist_sortdescending = false;
1786 if (m_state != m_slist) {
1787 Con_Print("Sending requests to master servers\n");
1788 ServerList_QueryList();
1789 serverlist_consoleoutput = true;
1790 Con_Print("Listening for replies...\n");
1792 ServerList_QueryList();
1795 void NetConn_Init(void)
1798 lhnetaddress_t tempaddress;
1799 netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
1800 Cmd_AddCommand("net_stats", Net_Stats_f);
1801 Cmd_AddCommand("net_slist", Net_Slist_f);
1802 Cmd_AddCommand("heartbeat", Net_Heartbeat_f);
1803 Cvar_RegisterVariable(&net_messagetimeout);
1804 Cvar_RegisterVariable(&net_messagerejointimeout);
1805 Cvar_RegisterVariable(&net_connecttimeout);
1806 Cvar_RegisterVariable(&cl_netlocalping);
1807 Cvar_RegisterVariable(&cl_netpacketloss);
1808 Cvar_RegisterVariable(&hostname);
1809 Cvar_RegisterVariable(&developer_networking);
1810 Cvar_RegisterVariable(&cl_netport);
1811 Cvar_RegisterVariable(&sv_netport);
1812 Cvar_RegisterVariable(&net_address);
1813 //Cvar_RegisterVariable(&net_address_ipv6);
1814 Cvar_RegisterVariable(&sv_public);
1815 Cvar_RegisterVariable(&sv_heartbeatperiod);
1816 for (i = 0;sv_masters[i].name;i++)
1817 Cvar_RegisterVariable(&sv_masters[i]);
1818 // COMMANDLINEOPTION: Server: -ip <ipaddress> sets the ip address of this machine for purposes of networking (default 0.0.0.0 also known as INADDR_ANY), use only if you have multiple network adapters and need to choose one specifically.
1819 if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
1821 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
1823 Con_Printf("-ip option used, setting net_address to \"%s\"\n");
1824 Cvar_SetQuick(&net_address, com_argv[i + 1]);
1827 Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
1829 // COMMANDLINEOPTION: Server: -port <portnumber> sets the port to use for a server (default 26000, the same port as QUAKE itself), useful if you host multiple servers on your machine
1830 if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
1832 i = atoi(com_argv[i + 1]);
1833 if (i >= 0 && i < 65536)
1835 Con_Printf("-port option used, setting port cvar to %i\n", i);
1836 Cvar_SetValueQuick(&sv_netport, i);
1839 Con_Printf("-port option used, but %i is not a valid port number\n", i);
1843 net_message.data = net_message_buf;
1844 net_message.maxsize = sizeof(net_message_buf);
1845 net_message.cursize = 0;
1849 void NetConn_Shutdown(void)
1851 NetConn_CloseClientPorts();
1852 NetConn_CloseServerPorts();