402 lines
11 KiB
C
402 lines
11 KiB
C
/*
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net.h - interface to the networking layer
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1999,2000 contributors of the QuakeForge project
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Please see the file "AUTHORS" for a list of contributors
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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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#ifndef __NET_H
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#define __NET_H
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#include <qtypes.h>
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#include <common.h>
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#include <cvar.h>
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#include <render.h>
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#include <qstructs.h>
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#define PORT_ANY -1
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// Uncomment this line for IPv6 support
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//#define LINUX_IPV6
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struct qsockaddr
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{
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short sa_family;
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unsigned char sa_data[14];
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};
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typedef struct
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{
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#ifdef HAVE_IPV6
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unsigned int ip[4];
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#else
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byte ip[4];
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#endif
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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 int net_socket;
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#ifdef UQUAKE
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// This ifdef is for clarity, not compilability
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#define NET_NAMELEN 64
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#define NET_MAXMESSAGE 8192
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#define NET_HEADERSIZE (2 * sizeof(unsigned int))
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#define NET_DATAGRAMSIZE (MAX_DATAGRAM + NET_HEADERSIZE)
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// NetHeader flags
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#define NETFLAG_LENGTH_MASK 0x0000ffff
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#define NETFLAG_DATA 0x00010000
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#define NETFLAG_ACK 0x00020000
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#define NETFLAG_NAK 0x00040000
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#define NETFLAG_EOM 0x00080000
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#define NETFLAG_UNRELIABLE 0x00100000
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#define NETFLAG_CTL 0x80000000
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#define NET_PROTOCOL_VERSION 3
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#define CCREQ_CONNECT 0x01
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#define CCREQ_SERVER_INFO 0x02
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#define CCREQ_PLAYER_INFO 0x03
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#define CCREQ_RULE_INFO 0x04
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#define CCREP_ACCEPT 0x81
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#define CCREP_REJECT 0x82
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#define CCREP_SERVER_INFO 0x83
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#define CCREP_PLAYER_INFO 0x84
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#define CCREP_RULE_INFO 0x85
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typedef struct qsocket_s
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{
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struct qsocket_s *next;
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double connecttime;
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double lastMessageTime;
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double lastSendTime;
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qboolean disconnected;
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qboolean canSend;
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qboolean sendNext;
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int driver;
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int landriver;
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int socket;
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void *driverdata;
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unsigned int ackSequence;
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unsigned int sendSequence;
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unsigned int unreliableSendSequence;
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int sendMessageLength;
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byte sendMessage [NET_MAXMESSAGE];
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unsigned int receiveSequence;
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unsigned int unreliableReceiveSequence;
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int receiveMessageLength;
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byte receiveMessage [NET_MAXMESSAGE];
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struct qsockaddr addr;
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char address[NET_NAMELEN];
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} qsocket_t;
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extern qsocket_t *net_activeSockets;
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extern qsocket_t *net_freeSockets;
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extern int net_numsockets;
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typedef struct
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{
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char *name;
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qboolean initialized;
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int controlSock;
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int (*Init) (void);
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void (*Shutdown) (void);
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void (*Listen) (qboolean state);
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int (*OpenSocket) (int port);
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int (*CloseSocket) (int socket);
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int (*Connect) (int socket, struct qsockaddr *addr);
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int (*CheckNewConnections) (void);
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int (*Read) (int socket, byte *buf, int len, struct qsockaddr *addr);
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int (*Write) (int socket, byte *buf, int len, struct qsockaddr *addr);
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int (*Broadcast) (int socket, byte *buf, int len);
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char * (*AddrToString) (struct qsockaddr *addr);
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int (*StringToAddr) (char *string, struct qsockaddr *addr);
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int (*GetSocketAddr) (int socket, struct qsockaddr *addr);
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int (*GetNameFromAddr) (struct qsockaddr *addr, char *name);
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int (*GetAddrFromName) (char *name, struct qsockaddr *addr);
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int (*AddrCompare) (struct qsockaddr *addr1, struct qsockaddr *addr2);
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int (*GetSocketPort) (struct qsockaddr *addr);
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int (*SetSocketPort) (struct qsockaddr *addr, int port);
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} net_landriver_t;
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#define MAX_NET_DRIVERS 8
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extern int net_numlandrivers;
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extern net_landriver_t net_landrivers[MAX_NET_DRIVERS];
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typedef struct
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{
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char *name;
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qboolean initialized;
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int (*Init) (void);
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void (*Listen) (qboolean state);
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void (*SearchForHosts) (qboolean xmit);
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qsocket_t *(*Connect) (char *host);
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qsocket_t *(*CheckNewConnections) (void);
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int (*QGetMessage) (qsocket_t *sock);
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int (*QSendMessage) (qsocket_t *sock, sizebuf_t *data);
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int (*SendUnreliableMessage) (qsocket_t *sock, sizebuf_t *data);
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qboolean (*CanSendMessage) (qsocket_t *sock);
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qboolean (*CanSendUnreliableMessage) (qsocket_t *sock);
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void (*Close) (qsocket_t *sock);
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void (*Shutdown) (void);
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int controlSock;
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} net_driver_t;
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extern int net_numdrivers;
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extern net_driver_t net_drivers[MAX_NET_DRIVERS];
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extern int DEFAULTnet_hostport;
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extern int net_hostport;
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extern int net_driverlevel;
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extern char playername[];
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extern int playercolor;
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extern int messagesSent;
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extern int messagesReceived;
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extern int unreliableMessagesSent;
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extern int unreliableMessagesReceived;
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#endif // UQUAKE
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#ifdef QUAKEWORLD
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void NET_Init (int port);
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#endif
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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/good packets,
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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; // realtime > nc->cleartime
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// means we're 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, 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; // # of last send
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// reliable staging and holding areas
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sizebuf_t message; // write buffer
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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 msg
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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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#ifdef QUAKEWORLD
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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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#endif
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extern cvar_t hostname;
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#ifdef UQUAKE
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qsocket_t *NET_NewQSocket (void);
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void NET_FreeQSocket(qsocket_t *);
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double SetNetTime(void);
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#define HOSTCACHESIZE 8
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typedef struct
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{
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char name[16];
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char map[16];
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char cname[32];
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int users;
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int maxusers;
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int driver;
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int ldriver;
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struct qsockaddr addr;
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} hostcache_t;
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extern int hostCacheCount;
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extern hostcache_t hostcache[HOSTCACHESIZE];
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//============================================================================
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//
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// public network functions
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//
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//============================================================================
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extern double net_time;
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extern sizebuf_t net_message;
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extern int net_activeconnections;
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void NET_Init (void);
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void NET_Shutdown (void);
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struct qsocket_s *NET_CheckNewConnections (void);
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// returns a new connection number if there is one pending, else -1
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struct qsocket_s *NET_Connect (char *host);
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// called by client to connect to a host. Returns -1 if not able to
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qboolean NET_CanSendMessage (qsocket_t *sock);
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// Returns true or false if the given qsocket can currently accept a
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// message to be transmitted.
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int NET_GetMessage (struct qsocket_s *sock);
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// returns data in net_message sizebuf
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// returns 0 if no data is waiting
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// returns 1 if a message was received
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// returns 2 if an unreliable message was received
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// returns -1 if the connection died
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int NET_SendMessage (struct qsocket_s *sock, sizebuf_t *data);
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int NET_SendUnreliableMessage (struct qsocket_s *sock, sizebuf_t *data);
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// returns 0 if the message connot be delivered reliably, but the connection
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// is still considered valid
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// returns 1 if the message was sent properly
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// returns -1 if the connection died
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int NET_SendToAll(sizebuf_t *data, int blocktime);
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// This is a reliable *blocking* send to all attached clients.
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void NET_Close (struct qsocket_s *sock);
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// if a dead connection is returned by a get or send function, this function
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// should be called when it is convenient
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// Server calls when a client is kicked off for a game related misbehavior
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// like an illegal protocal conversation. Client calls when disconnecting
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// from a server.
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// A netcon_t number will not be reused until this function is called for it
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void NET_Poll(void);
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typedef struct _PollProcedure
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{
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struct _PollProcedure *next;
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double nextTime;
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void (*procedure)();
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void *arg;
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} PollProcedure;
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void SchedulePollProcedure(PollProcedure *pp, double timeOffset);
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extern qboolean serialAvailable;
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extern qboolean ipxAvailable;
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extern qboolean tcpipAvailable;
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extern char my_ipx_address[NET_NAMELEN];
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extern char my_tcpip_address[NET_NAMELEN];
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extern void (*GetComPortConfig) (int portNumber, int *port, int *irq, int *baud, qboolean *useModem);
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extern void (*SetComPortConfig) (int portNumber, int port, int irq, int baud, qboolean useModem);
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extern void (*GetModemConfig) (int portNumber, char *dialType, char *clear, char *init, char *hangup);
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extern void (*SetModemConfig) (int portNumber, char *dialType, char *clear, char *init, char *hangup);
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extern qboolean slistInProgress;
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extern qboolean slistSilent;
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extern qboolean slistLocal;
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void NET_Slist_f (void);
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#endif // UQUAKE
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#define MAX_PACKET_ENTITIES 64 // doesn't count nails
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typedef struct
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{
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int num_entities;
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entity_state_t entities[MAX_PACKET_ENTITIES];
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} packet_entities_t;
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typedef struct usercmd_s
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{
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byte msec;
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vec3_t angles;
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#ifdef UQUAKE
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float forwardmove, sidemove, upmove;
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#elif QUAKEWORLD
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short forwardmove, sidemove, upmove;
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#endif
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byte buttons;
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byte impulse;
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#ifdef QUAKE2
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byte lightlevel;
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#endif
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} usercmd_t;
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#endif // __NET_H
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