2 Copyright (C) 1996-1997 Id Software, Inc.
3 Copyright (C) 2003 Forest Hale
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 See the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 #define NET_HEADERSIZE (2 * sizeof(unsigned int))
30 #define NETFLAG_LENGTH_MASK 0x0000ffff
31 #define NETFLAG_DATA 0x00010000
32 #define NETFLAG_ACK 0x00020000
33 #define NETFLAG_NAK 0x00040000
34 #define NETFLAG_EOM 0x00080000
35 #define NETFLAG_UNRELIABLE 0x00100000
36 #define NETFLAG_CTL 0x80000000
37 #define NETFLAG_CRYPTO 0x40000000
40 #define NET_PROTOCOL_VERSION 3
41 #define NET_EXTRESPONSE_MAX 16
43 /// \page netconn The network info/connection protocol.
44 /// It is used to find Quake
45 /// servers, get info about them, and connect to them. Once connected, the
46 /// Quake game protocol (documented elsewhere) is used.
49 /// General notes:\code
50 /// game_name is currently always "QUAKE", but is there so this same protocol
51 /// can be used for future games as well; can you say Quake2?
54 /// string game_name "QUAKE"
55 /// byte net_protocol_version NET_PROTOCOL_VERSION
58 /// string game_name "QUAKE"
59 /// byte net_protocol_version NET_PROTOCOL_VERSION
62 /// byte player_number
80 /// string server_address
83 /// byte current_players
85 /// byte protocol_version NET_PROTOCOL_VERSION
88 /// byte player_number
103 /// There are two address forms used above. The short form is just a
104 /// port number. The address that goes along with the port is defined as
105 /// "whatever address you receive this reponse from". This lets us use
106 /// the host OS to solve the problem of multiple host addresses (possibly
107 /// with no routing between them); the host will use the right address
108 /// when we reply to the inbound connection request. The long from is
109 /// a full address and port in a string. It is used for returning the
110 /// address of a server that is not running locally.
112 #define CCREQ_CONNECT 0x01
113 #define CCREQ_SERVER_INFO 0x02
114 #define CCREQ_PLAYER_INFO 0x03
115 #define CCREQ_RULE_INFO 0x04
116 #define CCREQ_RCON 0x05 // RocketGuy: ProQuake rcon support
118 #define CCREP_ACCEPT 0x81
119 #define CCREP_REJECT 0x82
120 #define CCREP_SERVER_INFO 0x83
121 #define CCREP_PLAYER_INFO 0x84
122 #define CCREP_RULE_INFO 0x85
123 #define CCREP_RCON 0x86 // RocketGuy: ProQuake rcon support
125 typedef struct netgraphitem_s
134 typedef struct netconn_s
136 struct netconn_s *next;
138 lhnetsocket_t *mysocket;
139 lhnetaddress_t peeraddress;
141 // this is mostly identical to qsocket_t from quake
143 /// if this time is reached, kick off peer
146 double lastMessageTime;
149 /// writing buffer to send to peer as the next reliable message
150 /// can be added to at any time, copied into sendMessage buffer when it is
151 /// possible to send a reliable message and then cleared
154 unsigned char messagedata[NET_MAXMESSAGE];
157 /// reliable message that is currently sending
158 /// (for building fragments)
159 int sendMessageLength;
160 unsigned char sendMessage[NET_MAXMESSAGE];
162 /// reliable message that is currently being received
163 /// (for putting together fragments)
164 int receiveMessageLength;
165 unsigned char receiveMessage[NET_MAXMESSAGE];
167 /// used by both NQ and QW protocols
168 unsigned int outgoing_unreliable_sequence;
172 unsigned int ackSequence;
173 unsigned int sendSequence;
175 unsigned int receiveSequence;
176 unsigned int unreliableReceiveSequence;
182 qboolean fatal_error;
184 float last_received; // for timeouts
186 // the statistics are cleared at each client begin, because
187 // the server connecting process gives a bogus picture of the data
188 float frame_latency; // rolling average
191 int drop_count; ///< dropped packets, cleared each level
192 int good_count; ///< cleared each level
196 // sequencing variables
197 int incoming_sequence;
198 int incoming_acknowledged;
199 int incoming_reliable_acknowledged; ///< single bit
201 int incoming_reliable_sequence; ///< single bit, maintained local
203 int reliable_sequence; ///< single bit
204 int last_reliable_sequence; ///< sequence number of last send
208 // bandwidth estimator
209 double cleartime; // if realtime > nc->cleartime, free to go
211 // this tracks packet loss and packet sizes on the most recent packets
212 // used by shownetgraph feature
213 #define NETGRAPH_PACKETS 256
214 #define NETGRAPH_NOPACKET 0
215 #define NETGRAPH_LOSTPACKET -1
216 #define NETGRAPH_CHOKEDPACKET -2
217 int incoming_packetcounter;
218 netgraphitem_t incoming_netgraph[NETGRAPH_PACKETS];
219 int outgoing_packetcounter;
220 netgraphitem_t outgoing_netgraph[NETGRAPH_PACKETS];
226 extern netconn_t *netconn_list;
227 extern mempool_t *netconn_mempool;
229 extern cvar_t hostname;
230 extern cvar_t developer_networking;
232 #define SERVERLIST_VIEWLISTSIZE SERVERLIST_TOTALSIZE
234 typedef enum serverlist_maskop_e
236 // SLMO_CONTAINS is the default for strings
237 // SLMO_GREATEREQUAL is the default for numbers (also used when OP == CONTAINS or NOTCONTAINS
249 } serverlist_maskop_t;
251 /// struct with all fields that you can search for or sort by
252 typedef struct serverlist_info_s
254 /// address for connecting
256 /// ping time for sorting servers
264 /// name of the session
266 /// qc-defined short status string
268 /// frags/ping/name list (if they fit in the packet)
270 /// max client number
272 /// number of currently connected players (including bots)
274 /// number of currently connected players that are bots
276 /// number of currently connected players that are not bots
278 /// number of free slots
282 /// game data version
283 /// (an integer that is used for filtering incompatible servers,
284 /// not filterable by QC)
286 /// favorite server flag
308 } serverlist_infofield_t;
313 SLSF_FAVORITESFIRST = 2
314 } serverlist_sortflags_t;
323 } serverlist_query_state;
325 typedef struct serverlist_entry_s
327 /// used to determine whether this entry should be included into the final view
328 serverlist_query_state query;
329 /// used to count the number of times the host has tried to query this server already
330 unsigned querycounter;
331 /// used to calculate ping when update comes in
333 /// query protocol to use on this server, may be PROTOCOL_QUAKEWORLD or PROTOCOL_DARKPLACES7
336 serverlist_info_t info;
341 } serverlist_entry_t;
343 typedef struct serverlist_mask_s
346 serverlist_maskop_t tests[SLIF_COUNT];
347 serverlist_info_t info;
350 #define ServerList_GetCacheEntry(x) (&serverlist_cache[(x)])
351 #define ServerList_GetViewEntry(x) (ServerList_GetCacheEntry(serverlist_viewlist[(x)]))
353 extern serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
354 extern serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
356 extern serverlist_infofield_t serverlist_sortbyfield;
357 extern int serverlist_sortflags; // not using the enum, as it is a bitmask
359 #if SERVERLIST_TOTALSIZE > 65536
360 #error too many servers, change type of index array
362 extern int serverlist_viewcount;
363 extern unsigned short serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
365 extern int serverlist_cachecount;
366 extern serverlist_entry_t *serverlist_cache;
368 extern qboolean serverlist_consoleoutput;
370 void ServerList_GetPlayerStatistics(int *numplayerspointer, int *maxplayerspointer);
372 //============================================================================
374 // public network functions
376 //============================================================================
378 extern char cl_net_extresponse[NET_EXTRESPONSE_MAX][1400];
379 extern int cl_net_extresponse_count;
380 extern int cl_net_extresponse_last;
382 extern char sv_net_extresponse[NET_EXTRESPONSE_MAX][1400];
383 extern int sv_net_extresponse_count;
384 extern int sv_net_extresponse_last;
386 extern double masterquerytime;
387 extern int masterquerycount;
388 extern int masterreplycount;
389 extern int serverquerycount;
390 extern int serverreplycount;
392 extern sizebuf_t net_message;
394 extern cvar_t sv_public;
396 extern cvar_t cl_netlocalping;
398 extern cvar_t cl_netport;
399 extern cvar_t sv_netport;
400 extern cvar_t net_address;
401 extern cvar_t net_address_ipv6;
403 qboolean NetConn_CanSend(netconn_t *conn);
404 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol, int rate, qboolean quakesignon_suppressreliables);
405 qboolean NetConn_HaveClientPorts(void);
406 qboolean NetConn_HaveServerPorts(void);
407 void NetConn_CloseClientPorts(void);
408 void NetConn_OpenClientPorts(void);
409 void NetConn_CloseServerPorts(void);
410 void NetConn_OpenServerPorts(int opennetports);
411 void NetConn_UpdateSockets(void);
412 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address);
413 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address);
414 void NetConn_Init(void);
415 void NetConn_Shutdown(void);
416 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress);
417 void NetConn_Close(netconn_t *conn);
418 void NetConn_Listen(qboolean state);
419 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress);
420 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress);
421 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress);
422 int NetConn_IsLocalGame(void);
423 void NetConn_ClientFrame(void);
424 void NetConn_ServerFrame(void);
425 void NetConn_SleepMicroseconds(int microseconds);
426 void NetConn_QueryMasters(qboolean querydp, qboolean queryqw);
427 void NetConn_Heartbeat(int priority);
428 void NetConn_QueryQueueFrame(void);
429 void Net_Stats_f(void);
430 void Net_Slist_f(void);
431 void Net_SlistQW_f(void);
432 void Net_Refresh_f(void);
434 /// ServerList interface (public)
435 /// manually refresh the view set, do this after having changed the mask or any other flag
436 void ServerList_RebuildViewList(void);
437 void ServerList_ResetMasks(void);
438 void ServerList_QueryList(qboolean resetcache, qboolean querydp, qboolean queryqw, qboolean consoleoutput);
440 /// called whenever net_slist_favorites changes
441 void NetConn_UpdateFavorites(void);
443 #define MAX_CHALLENGES 128
444 typedef struct challenge_s
446 lhnetaddress_t address;
452 extern challenge_t challenge[MAX_CHALLENGES];