fteqw/engine/common/net.h

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/*
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 enum {NA_INVALID, NA_LOOPBACK, NA_IP, NA_IPV6, NA_IPX, NA_BROADCAST_IP, NA_BROADCAST_IP6, NA_BROADCAST_IPX} netadrtype_t;
typedef enum {NS_CLIENT, NS_SERVER} netsrc_t;
typedef struct
{
netadrtype_t type;
union {
qbyte ip[4];
qbyte ip6[16];
qbyte ipx[10];
} address;
unsigned short port;
} netadr_t;
struct sockaddr_qstorage
{
short dontusesa_family;
unsigned char dontusesa_pad[6];
#if defined(_MSC_VER) || defined(MINGW)
__int64 sa_align;
#else
int sa_align[2];
#endif
unsigned char sa_pad2[112];
};
extern netadr_t net_local_sv_ipadr;
extern netadr_t net_local_sv_ip6adr;
extern netadr_t net_local_sv_ipxadr;
extern netadr_t net_local_sv_tcpipadr;
extern netadr_t net_local_cl_ipadr;
extern netadr_t net_from; // address of who sent the packet
extern sizebuf_t net_message;
//#define MAX_UDP_PACKET (MAX_MSGLEN*2) // one more than msg + header
#define MAX_UDP_PACKET 8192 // one more than msg + header
extern qbyte net_message_buffer[MAX_UDP_PACKET];
extern cvar_t hostname;
int TCP_OpenStream (netadr_t remoteaddr); //makes things easier
void NET_Init (void);
void NET_InitClient (void);
void NET_InitServer (void);
void NET_CloseServer (void);
void UDP_CloseSocket (int socket);
void NET_Shutdown (void);
qboolean NET_GetPacket (netsrc_t socket);
void NET_SendPacket (netsrc_t socket, 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_StringToSockaddr (char *s, struct sockaddr_qstorage *sadr);
qboolean NET_StringToAdr (char *s, netadr_t *a);
qboolean NET_IsClientLegal(netadr_t *adr);
qboolean NET_IsLoopBackAddress (netadr_t adr);
qboolean NET_StringToAdrMasked (char *s, netadr_t *a, netadr_t *amask);
char *NET_AdrToStringMasked (netadr_t a, netadr_t amask);
void NET_IntegerToMask (netadr_t *a, netadr_t *amask, int bits);
qboolean NET_CompareAdrMasked(netadr_t a, netadr_t b, netadr_t mask);
//============================================================================
#define OLD_AVG 0.99 // total = oldtotal*OLD_AVG + new*(1-OLD_AVG)
#define MAX_LATENT 32
typedef struct
{
qboolean fatal_error;
#ifdef NQPROT
qboolean isnqprotocol;
#endif
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;
netsrc_t sock;
int qport;
// bandwidth estimator
double cleartime; // if realtime > nc->cleartime, free to go
// double rate; // seconds / qbyte
// sequencing variables
int incoming_unreliable; //dictated by the other end.
int incoming_sequence;
int incoming_acknowledged;
int incoming_reliable_acknowledged; // single bit
int incoming_reliable_sequence; // single bit, maintained local
int outgoing_unreliable;
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
qbyte message_buf[MAX_OVERALLMSGLEN];
//nq has message truncation.
int reliable_length;
int reliable_start;
qbyte reliable_buf[MAX_OVERALLMSGLEN]; // unacked reliable message
// time and size data to calculate bandwidth
int outgoing_size[MAX_LATENT];
double outgoing_time[MAX_LATENT];
qboolean compress;
//nq servers must recieve truncated packets.
int in_fragment_length;
char in_fragment_buf[MAX_OVERALLMSGLEN];
int in_fragment_start;
} netchan_t;
extern int net_drop; // packets dropped before this one
void Netchan_Init (void);
void Netchan_Transmit (netchan_t *chan, int length, qbyte *data, int rate);
void Netchan_OutOfBand (netsrc_t sock, netadr_t adr, int length, qbyte *data);
void VARGS Netchan_OutOfBandPrint (netsrc_t sock, netadr_t adr, char *format, ...);
void VARGS Netchan_OutOfBandTPrintf (netsrc_t sock, netadr_t adr, int language, translation_t text, ...);
qboolean Netchan_Process (netchan_t *chan);
void Netchan_Setup (netsrc_t sock, netchan_t *chan, netadr_t adr, int qport);
qboolean Netchan_CanPacket (netchan_t *chan, int rate);
qboolean Netchan_CanReliable (netchan_t *chan, int rate);
#ifdef NQPROT
qboolean NQNetChan_Process(netchan_t *chan);
#endif
#ifdef HUFFNETWORK
int Huff_PreferedCompressionCRC (void);
void Huff_EncryptPacket(sizebuf_t *msg, int offset);
void Huff_DecryptPacket(sizebuf_t *msg, int offset);
qboolean Huff_CompressionCRC(int crc);
void Huff_CompressPacket(sizebuf_t *msg, int offset);
void Huff_DecompressPacket(sizebuf_t *msg, int offset);
int Huff_GetByte(qbyte *buffer, int *count);
void Huff_EmitByte(int ch, qbyte *buffer, int *count);
#endif
#ifdef NQPROT
//taken from nq's net.h
//refer to that for usage info. :)
#define NETFLAG_LENGTH_MASK 0x0000ffff
#define NETFLAG_DATA 0x00010000
#define NETFLAG_ACK 0x00020000
#define NETFLAG_NAK 0x00040000
#define NETFLAG_EOM 0x00080000
#define NETFLAG_UNRELIABLE 0x00100000
#define NETFLAG_CTL 0x80000000
#define NET_GAMENAME_NQ "QUAKE"
#define NET_PROTOCOL_VERSION 3
#define CCREQ_CONNECT 0x01
#define CCREQ_SERVER_INFO 0x02
#define CCREQ_PLAYER_INFO 0x03
#define CCREQ_RULE_INFO 0x04
#define CCREP_ACCEPT 0x81
#define CCREP_REJECT 0x82
#define CCREP_SERVER_INFO 0x83
#define CCREP_PLAYER_INFO 0x84
#define CCREP_RULE_INFO 0x85
//server->client protocol info
#define NQ_PROTOCOL_VERSION 15
#define DP5_PROTOCOL_VERSION 3502
#define DP6_PROTOCOL_VERSION 3503
#define DP7_PROTOCOL_VERSION 3504
#endif
int UDP_OpenSocket (int port, qboolean bcast);
int IPX_OpenSocket (int port, qboolean bcast);
int NetadrToSockadr (netadr_t *a, struct sockaddr_qstorage *s);
void SockadrToNetadr (struct sockaddr_qstorage *s, netadr_t *a);
qboolean NET_Sleep(int msec, qboolean stdinissocket);