ref: 0d4b3504cc557b5ded1180e2fd00cd210c1024d7
dir: /QW/client/net.h/
/*
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// net.h -- quake's interface to the networking layer
#define PORT_ANY -1
typedef struct
{
byte ip[4];
unsigned short port;
unsigned short pad;
} netadr_t;
extern netadr_t net_local_adr;
extern netadr_t net_from; // address of who sent the packet
extern sizebuf_t net_message;
extern cvar_t hostname;
extern int net_socket;
void NET_Init (int port);
void NET_Shutdown (void);
qboolean NET_GetPacket (void);
void NET_SendPacket (int length, void *data, netadr_t to);
qboolean NET_CompareAdr (netadr_t a, netadr_t b);
qboolean NET_CompareBaseAdr (netadr_t a, netadr_t b);
char *NET_AdrToString (netadr_t a);
char *NET_BaseAdrToString (netadr_t a);
qboolean NET_StringToAdr (char *s, netadr_t *a);
qboolean NET_IsClientLegal(netadr_t *adr);
//============================================================================
#define OLD_AVG 0.99 // total = oldtotal*OLD_AVG + new*(1-OLD_AVG)
#define MAX_LATENT 32
typedef struct
{
qboolean fatal_error;
float last_received; // for timeouts
// the statistics are cleared at each client begin, because
// the server connecting process gives a bogus picture of the data
float frame_latency; // rolling average
float frame_rate;
int drop_count; // dropped packets, cleared each level
int good_count; // cleared each level
netadr_t remote_address;
int qport;
// bandwidth estimator
double cleartime; // if realtime > nc->cleartime, free to go
double rate; // seconds / byte
// sequencing variables
int incoming_sequence;
int incoming_acknowledged;
int incoming_reliable_acknowledged; // single bit
int incoming_reliable_sequence; // single bit, maintained local
int outgoing_sequence;
int reliable_sequence; // single bit
int last_reliable_sequence; // sequence number of last send
// reliable staging and holding areas
sizebuf_t message; // writing buffer to send to server
byte message_buf[MAX_MSGLEN];
int reliable_length;
byte reliable_buf[MAX_MSGLEN]; // unacked reliable message
// time and size data to calculate bandwidth
int outgoing_size[MAX_LATENT];
double outgoing_time[MAX_LATENT];
} netchan_t;
extern int net_drop; // packets dropped before this one
void Netchan_Init (void);
void Netchan_Transmit (netchan_t *chan, int length, byte *data);
void Netchan_OutOfBand (netadr_t adr, int length, byte *data);
void Netchan_OutOfBandPrint (netadr_t adr, char *format, ...);
qboolean Netchan_Process (netchan_t *chan);
void Netchan_Setup (netchan_t *chan, netadr_t adr, int qport);
qboolean Netchan_CanPacket (netchan_t *chan);
qboolean Netchan_CanReliable (netchan_t *chan);