113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
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/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// net.h -- quake's interface to the networking layer
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#define PORT_ANY -1
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typedef struct
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{
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byte ip[4];
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unsigned short port;
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unsigned short pad;
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} netadr_t;
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extern netadr_t net_local_adr;
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extern netadr_t net_from; // address of who sent the packet
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extern sizebuf_t net_message;
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extern cvar_t hostname;
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extern int net_socket;
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void NET_Init (int port);
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void NET_Shutdown (void);
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qboolean NET_GetPacket (void);
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void NET_SendPacket (int length, void *data, netadr_t to);
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qboolean NET_CompareAdr (netadr_t a, netadr_t b);
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qboolean NET_CompareBaseAdr (netadr_t a, netadr_t b);
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char *NET_AdrToString (netadr_t a);
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char *NET_BaseAdrToString (netadr_t a);
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qboolean NET_StringToAdr (char *s, netadr_t *a);
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qboolean NET_IsClientLegal(netadr_t *adr);
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//============================================================================
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#define OLD_AVG 0.99 // total = oldtotal*OLD_AVG + new*(1-OLD_AVG)
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#define MAX_LATENT 32
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typedef struct
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{
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qboolean fatal_error;
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float last_received; // for timeouts
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// the statistics are cleared at each client begin, because
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// the server connecting process gives a bogus picture of the data
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float frame_latency; // rolling average
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float frame_rate;
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int drop_count; // dropped packets, cleared each level
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int good_count; // cleared each level
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netadr_t remote_address;
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int qport;
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// bandwidth estimator
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double cleartime; // if realtime > nc->cleartime, free to go
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double rate; // seconds / byte
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// sequencing variables
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int incoming_sequence;
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int incoming_acknowledged;
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int incoming_reliable_acknowledged; // single bit
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int incoming_reliable_sequence; // single bit, maintained local
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int outgoing_sequence;
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int reliable_sequence; // single bit
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int last_reliable_sequence; // sequence number of last send
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// reliable staging and holding areas
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sizebuf_t message; // writing buffer to send to server
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byte message_buf[MAX_MSGLEN];
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int reliable_length;
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byte reliable_buf[MAX_MSGLEN]; // unacked reliable message
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// time and size data to calculate bandwidth
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int outgoing_size[MAX_LATENT];
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double outgoing_time[MAX_LATENT];
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} netchan_t;
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extern int net_drop; // packets dropped before this one
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void Netchan_Init (void);
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void Netchan_Transmit (netchan_t *chan, int length, byte *data);
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void Netchan_OutOfBand (netadr_t adr, int length, byte *data);
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void Netchan_OutOfBandPrint (netadr_t adr, char *format, ...);
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qboolean Netchan_Process (netchan_t *chan);
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void Netchan_Setup (netchan_t *chan, netadr_t adr, int qport);
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qboolean Netchan_CanPacket (netchan_t *chan);
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qboolean Netchan_CanReliable (netchan_t *chan);
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