i_net.c
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上传用户:xuyinpeng
上传日期:2021-05-12
资源大小:455k
文件大小:9k
源码类别:
射击游戏
开发平台:
Visual C++
- // Emacs style mode select -*- C++ -*-
- //-----------------------------------------------------------------------------
- //
- // $Id:$
- //
- // Copyright (C) 1993-1996 by id Software, Inc.
- //
- // This source is available for distribution and/or modification
- // only under the terms of the DOOM Source Code License as
- // published by id Software. All rights reserved.
- //
- // The source is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
- // for more details.
- //
- // $Log:$
- //
- // DESCRIPTION:
- //
- //-----------------------------------------------------------------------------
- static const char
- rcsid[] = "$Id: m_bbox.c,v 1.1 1997/02/03 22:45:10 b1 Exp $";
- #include <stdlib.h>
- #include <string.h>
- #include <stdio.h>
- //#include <sys/socket.h>
- //#include <netinet/in.h>
- //#include <arpa/inet.h>
- #include <errno.h>
- //#include <unistd.h>
- //#include <netdb.h>
- //#include <sys/ioctl.h>
- #include "i_system.h"
- #include "d_event.h"
- #include "d_net.h"
- #include "m_argv.h"
- #include "doomstat.h"
- #ifdef __GNUG__
- #pragma implementation "i_net.h"
- #endif
- #include "i_net.h"
- // For some odd reason...
- #define ntohl(x)
- ((unsigned long int)((((unsigned long int)(x) & 0x000000ffU) << 24) |
- (((unsigned long int)(x) & 0x0000ff00U) << 8) |
- (((unsigned long int)(x) & 0x00ff0000U) >> 8) |
- (((unsigned long int)(x) & 0xff000000U) >> 24)))
- #define ntohs(x)
- ((unsigned short int)((((unsigned short int)(x) & 0x00ff) << 8) |
- (((unsigned short int)(x) & 0xff00) >> 8)))
- #define htonl(x) ntohl(x)
- #define htons(x) ntohs(x)
- void NetSend (void);
- boolean NetListen (void);
- char MsgText[2048];
- void WriteDebug(char *);
- //
- // NETWORKING
- //
- // FIXME
- #define IPPORT_USERRESERVED 26000
- int DOOMPORT = (IPPORT_USERRESERVED +0x1d );
- int sendsocket;
- int insocket;
- struct sockaddr_in sendaddress[MAXNETNODES];
- void (*netget) (void);
- void (*netsend) (void);
- //
- // UDPsocket
- //
- int UDPsocket (void)
- {
- int s;
- // allocate a socket
- s = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
- if (s < 0)
- {
- sprintf(MsgText, "ERROR:Can't create socket:%08X %sn", errno, strerror(errno));
- I_Error(MsgText);
- }
- return s;
- }
- //
- // BindToLocalPort
- //
- void BindToLocalPort( int s, int port )
- {
- int v;
- struct sockaddr_in address;
- memset (&address, 0, sizeof(address));
- address.sin_family = AF_INET;
- address.sin_addr.s_addr = INADDR_ANY;
- address.sin_port = port;
- v = bind(s, (void *)&address, sizeof(address));
- if (v == -1)
- I_Error ("BindToPort: bind: %s", strerror(errno));
- }
- //
- // PacketSend
- //
- void PacketSend (void)
- {
- int c;
- doomdata_t sw;
- // byte swap
- sw.checksum = htonl(netbuffer->checksum);
- sw.player = netbuffer->player;
- sw.retransmitfrom = netbuffer->retransmitfrom;
- sw.starttic = netbuffer->starttic;
- sw.numtics = netbuffer->numtics;
- for (c=0 ; c< netbuffer->numtics ; c++)
- {
- sw.cmds[c].forwardmove = netbuffer->cmds[c].forwardmove;
- sw.cmds[c].sidemove = netbuffer->cmds[c].sidemove;
- sw.cmds[c].angleturn = htons(netbuffer->cmds[c].angleturn);
- sw.cmds[c].consistancy = htons(netbuffer->cmds[c].consistancy);
- sw.cmds[c].chatchar = netbuffer->cmds[c].chatchar;
- sw.cmds[c].buttons = netbuffer->cmds[c].buttons;
- }
- //printf ("sending %in",gametic);
- c = sendto (sendsocket , (const char far *)&sw, doomcom->datalength
- ,0,(void *)&sendaddress[doomcom->remotenode]
- ,sizeof(sendaddress[doomcom->remotenode]));
- // if (c == -1)
- // I_Error ("SendPacket error: %s",strerror(errno));
- }
- //
- // PacketGet
- //
- void PacketGet (void)
- {
- int i;
- int c;
- struct sockaddr_in fromaddress;
- int fromlen;
- doomdata_t sw;
- fromlen = sizeof(fromaddress);
- c = recvfrom (insocket, (char far *)&sw, sizeof(sw),0,(struct sockaddr *)&fromaddress, &fromlen );
- if (c == SOCKET_ERROR )
- {
- c = WSAGetLastError();
- if (c != WSAEWOULDBLOCK)
- I_Error ("GetPacket: Network error.");
- doomcom->remotenode = -1; // no packet
- return;
- }
- {
- static int first=1;
- if (first)
- {
- sprintf(MsgText,"len=%d:p=[0x%x 0x%x] n", c, *(int*)&sw, *((int*)&sw+1));
- WriteDebug(MsgText);
- }
- first = 0;
- }
- // find remote node number
- for (i=0 ; i<doomcom->numnodes ; i++)
- if ( fromaddress.sin_addr.s_addr == sendaddress[i].sin_addr.s_addr )
- break;
- if (i == doomcom->numnodes)
- {
- // packet is not from one of the players (new game broadcast)
- doomcom->remotenode = -1; // no packet
- return;
- }
- doomcom->remotenode = i; // good packet from a game player
- doomcom->datalength = c;
- // byte swap
- netbuffer->checksum = ntohl(sw.checksum);
- netbuffer->player = sw.player;
- netbuffer->retransmitfrom = sw.retransmitfrom;
- netbuffer->starttic = sw.starttic;
- netbuffer->numtics = sw.numtics;
- for (c=0 ; c< netbuffer->numtics ; c++)
- {
- netbuffer->cmds[c].forwardmove = sw.cmds[c].forwardmove;
- netbuffer->cmds[c].sidemove = sw.cmds[c].sidemove;
- netbuffer->cmds[c].angleturn = ntohs(sw.cmds[c].angleturn);
- netbuffer->cmds[c].consistancy = ntohs(sw.cmds[c].consistancy);
- netbuffer->cmds[c].chatchar = sw.cmds[c].chatchar;
- netbuffer->cmds[c].buttons = sw.cmds[c].buttons;
- }
- }
- int GetLocalAddress (void)
- {
- char hostname[1024];
- struct hostent* hostentry; // host information entry
- int v;
- // get local address
- v = gethostname (hostname, sizeof(hostname));
- if (v == -1)
- I_Error ("GetLocalAddress : gethostname: errno %d",errno);
- hostentry = gethostbyname (hostname);
- if (!hostentry)
- I_Error ("GetLocalAddress : gethostbyname: couldn't get local host");
- return *(int *)hostentry->h_addr_list[0];
- }
- //
- // I_InitNetwork
- //
- void I_InitNetwork (void)
- {
- boolean trueval = true;
- int i, err;
- int p;
- struct hostent* hostentry; // host information entry
- WORD wVersionRequested;
- WSADATA wsaData;
- doomcom = malloc (sizeof (*doomcom) );
- memset (doomcom, 0, sizeof(*doomcom) );
- // set up for network
- i = M_CheckParm ("-dup");
- if (i && i< myargc-1)
- {
- doomcom->ticdup = myargv[i+1][0]-'0';
- if (doomcom->ticdup < 1)
- doomcom->ticdup = 1;
- if (doomcom->ticdup > 9)
- doomcom->ticdup = 9;
- }
- else
- doomcom-> ticdup = 1;
- if (M_CheckParm ("-extratic"))
- doomcom-> extratics = 1;
- else
- doomcom-> extratics = 0;
- p = M_CheckParm ("-port");
- if (p && p<myargc-1)
- {
- DOOMPORT = atoi (myargv[p+1]);
- //printf ("using alternate port %in",DOOMPORT);
- sprintf (MsgText, "using alternate port %in",DOOMPORT);
- WriteDebug(MsgText);
- }
- // parse network game options,
- // -net <consoleplayer> <host> <host> ...
- i = M_CheckParm ("-net");
- if (!i)
- {
- // single player game
- netgame = false;
- doomcom->id = DOOMCOM_ID;
- doomcom->numplayers = doomcom->numnodes = 1;
- doomcom->deathmatch = false;
- doomcom->consoleplayer = 0;
- return;
- }
- wVersionRequested = MAKEWORD(2,2);
- err = WSAStartup(wVersionRequested, &wsaData);
- netsend = PacketSend;
- netget = PacketGet;
- netgame = true;
- // parse player number and host list
- doomcom->consoleplayer = myargv[i+1][0]-'1';
- sprintf(MsgText, "console player number : %dn", doomcom->consoleplayer);
- WriteDebug(MsgText);
- doomcom->numnodes = 1; // this node for sure
- i++;
- while (++i < myargc && myargv[i][0] != '-')
- {
- sendaddress[doomcom->numnodes].sin_family = AF_INET;
- sendaddress[doomcom->numnodes].sin_port = htons(DOOMPORT);
- if (myargv[i][0] == '.')
- {
- sprintf(MsgText, "Node number %d address %sn", doomcom->numnodes, myargv[i]+1);
- WriteDebug(MsgText);
- sendaddress[doomcom->numnodes].sin_addr.s_addr = inet_addr(myargv[i]+1);
- }
- else
- {
- sprintf(MsgText, "Node number %d hostname %sn", doomcom->numnodes, myargv[i]);
- WriteDebug(MsgText);
- hostentry = gethostbyname(myargv[i]);
- if (!hostentry)
- I_Error ("gethostbyname: couldn't find %s", myargv[i]);
- sendaddress[doomcom->numnodes].sin_addr.s_addr = *(int *)hostentry->h_addr_list[0];
- }
- doomcom->numnodes++;
- }
- sprintf(MsgText, "Total number of players : %dn", (doomcom->numnodes-1));
- WriteDebug(MsgText);
- doomcom->id = DOOMCOM_ID;
- doomcom->numplayers = doomcom->numnodes;
- // build message to receive
- insocket = UDPsocket();
- BindToLocalPort(insocket,htons(DOOMPORT));
- ioctlsocket(insocket, FIONBIO, &trueval);
- sendsocket = UDPsocket();
- }
- void I_NetCmd (void)
- {
- if (doomcom->command == CMD_SEND)
- {
- netsend ();
- }
- else if (doomcom->command == CMD_GET)
- {
- netget ();
- }
- else
- I_Error ("Bad net cmd: %in",doomcom->command);
- }