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Annotation of doom/i_neorig, revision 1.1

1.1     ! root        1: // Emacs style mode select   -*- C++ -*- 
        !             2: //-----------------------------------------------------------------------------
        !             3: //
        !             4: // $Id:$
        !             5: //
        !             6: // Copyright (C) 1993-1996 by id Software, Inc.
        !             7: //
        !             8: // This program is free software; you can redistribute it and/or
        !             9: // modify it under the terms of the GNU General Public License
        !            10: // as published by the Free Software Foundation; either version 2
        !            11: // of the License, or (at your option) any later version.
        !            12: //
        !            13: // This program is distributed in the hope that it will be useful,
        !            14: // but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            15: // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            16: // GNU General Public License for more details.
        !            17: //
        !            18: // $Log:$
        !            19: //
        !            20: // DESCRIPTION:
        !            21: //
        !            22: //-----------------------------------------------------------------------------
        !            23: 
        !            24: static const char
        !            25: rcsid[] = "$Id: m_bbox.c,v 1.1 1997/02/03 22:45:10 b1 Exp $";
        !            26: 
        !            27: #include <stdlib.h>
        !            28: #include <string.h>
        !            29: #include <stdio.h>
        !            30: 
        !            31: #include <sys/socket.h>
        !            32: #include <netinet/in.h>
        !            33: #include <arpa/inet.h>
        !            34: #include <errno.h>
        !            35: #include <unistd.h>
        !            36: #include <netdb.h>
        !            37: #include <sys/ioctl.h>
        !            38: 
        !            39: #include "i_system.h"
        !            40: #include "d_event.h"
        !            41: #include "d_net.h"
        !            42: #include "m_argv.h"
        !            43: 
        !            44: #include "doomstat.h"
        !            45: 
        !            46: #ifdef __GNUG__
        !            47: #pragma implementation "i_net.h"
        !            48: #endif
        !            49: #include "i_net.h"
        !            50: 
        !            51: 
        !            52: 
        !            53: 
        !            54: 
        !            55: // For some odd reason...
        !            56: #define ntohl(x) \
        !            57:         ((unsigned long int)((((unsigned long int)(x) & 0x000000ffU) << 24) | \
        !            58:                              (((unsigned long int)(x) & 0x0000ff00U) <<  8) | \
        !            59:                              (((unsigned long int)(x) & 0x00ff0000U) >>  8) | \
        !            60:                              (((unsigned long int)(x) & 0xff000000U) >> 24)))
        !            61: 
        !            62: #define ntohs(x) \
        !            63:         ((unsigned short int)((((unsigned short int)(x) & 0x00ff) << 8) | \
        !            64:                               (((unsigned short int)(x) & 0xff00) >> 8))) \
        !            65:          
        !            66: #define htonl(x) ntohl(x)
        !            67: #define htons(x) ntohs(x)
        !            68: 
        !            69: void   NetSend (void);
        !            70: boolean NetListen (void);
        !            71: 
        !            72: 
        !            73: //
        !            74: // NETWORKING
        !            75: //
        !            76: 
        !            77: int    DOOMPORT =      (IPPORT_USERRESERVED +0x1d );
        !            78: 
        !            79: int                    sendsocket;
        !            80: int                    insocket;
        !            81: 
        !            82: struct sockaddr_in     sendaddress[MAXNETNODES];
        !            83: 
        !            84: void   (*netget) (void);
        !            85: void   (*netsend) (void);
        !            86: 
        !            87: 
        !            88: //
        !            89: // UDPsocket
        !            90: //
        !            91: int UDPsocket (void)
        !            92: {
        !            93:     int        s;
        !            94:        
        !            95:     // allocate a socket
        !            96:     s = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
        !            97:     if (s<0)
        !            98:        I_Error ("can't create socket: %s",strerror(errno));
        !            99:                
        !           100:     return s;
        !           101: }
        !           102: 
        !           103: //
        !           104: // BindToLocalPort
        !           105: //
        !           106: void
        !           107: BindToLocalPort
        !           108: ( int  s,
        !           109:   int  port )
        !           110: {
        !           111:     int                        v;
        !           112:     struct sockaddr_in address;
        !           113:        
        !           114:     memset (&address, 0, sizeof(address));
        !           115:     address.sin_family = AF_INET;
        !           116:     address.sin_addr.s_addr = INADDR_ANY;
        !           117:     address.sin_port = port;
        !           118:                        
        !           119:     v = bind (s, (void *)&address, sizeof(address));
        !           120:     if (v == -1)
        !           121:        I_Error ("BindToPort: bind: %s", strerror(errno));
        !           122: }
        !           123: 
        !           124: 
        !           125: //
        !           126: // PacketSend
        !           127: //
        !           128: void PacketSend (void)
        !           129: {
        !           130:     int                c;
        !           131:     doomdata_t sw;
        !           132:                                
        !           133:     // byte swap
        !           134:     sw.checksum = htonl(netbuffer->checksum);
        !           135:     sw.player = netbuffer->player;
        !           136:     sw.retransmitfrom = netbuffer->retransmitfrom;
        !           137:     sw.starttic = netbuffer->starttic;
        !           138:     sw.numtics = netbuffer->numtics;
        !           139:     for (c=0 ; c< netbuffer->numtics ; c++)
        !           140:     {
        !           141:        sw.cmds[c].forwardmove = netbuffer->cmds[c].forwardmove;
        !           142:        sw.cmds[c].sidemove = netbuffer->cmds[c].sidemove;
        !           143:        sw.cmds[c].angleturn = htons(netbuffer->cmds[c].angleturn);
        !           144:        sw.cmds[c].consistancy = htons(netbuffer->cmds[c].consistancy);
        !           145:        sw.cmds[c].chatchar = netbuffer->cmds[c].chatchar;
        !           146:        sw.cmds[c].buttons = netbuffer->cmds[c].buttons;
        !           147:     }
        !           148:                
        !           149:     //printf ("sending %i\n",gametic);         
        !           150:     c = sendto (sendsocket , &sw, doomcom->datalength
        !           151:                ,0,(void *)&sendaddress[doomcom->remotenode]
        !           152:                ,sizeof(sendaddress[doomcom->remotenode]));
        !           153:        
        !           154:     // if (c == -1)
        !           155:     //         I_Error ("SendPacket error: %s",strerror(errno));
        !           156: }
        !           157: 
        !           158: 
        !           159: //
        !           160: // PacketGet
        !           161: //
        !           162: void PacketGet (void)
        !           163: {
        !           164:     int                        i;
        !           165:     int                        c;
        !           166:     struct sockaddr_in fromaddress;
        !           167:     int                        fromlen;
        !           168:     doomdata_t         sw;
        !           169:                                
        !           170:     fromlen = sizeof(fromaddress);
        !           171:     c = recvfrom (insocket, &sw, sizeof(sw), 0
        !           172:                  , (struct sockaddr *)&fromaddress, &fromlen );
        !           173:     if (c == -1 )
        !           174:     {
        !           175:        if (errno != EWOULDBLOCK)
        !           176:            I_Error ("GetPacket: %s",strerror(errno));
        !           177:        doomcom->remotenode = -1;               // no packet
        !           178:        return;
        !           179:     }
        !           180: 
        !           181:     {
        !           182:        static int first=1;
        !           183:        if (first)
        !           184:            printf("len=%d:p=[0x%x 0x%x] \n", c, *(int*)&sw, *((int*)&sw+1));
        !           185:        first = 0;
        !           186:     }
        !           187: 
        !           188:     // find remote node number
        !           189:     for (i=0 ; i<doomcom->numnodes ; i++)
        !           190:        if ( fromaddress.sin_addr.s_addr == sendaddress[i].sin_addr.s_addr )
        !           191:            break;
        !           192: 
        !           193:     if (i == doomcom->numnodes)
        !           194:     {
        !           195:        // packet is not from one of the players (new game broadcast)
        !           196:        doomcom->remotenode = -1;               // no packet
        !           197:        return;
        !           198:     }
        !           199:        
        !           200:     doomcom->remotenode = i;                   // good packet from a game player
        !           201:     doomcom->datalength = c;
        !           202:        
        !           203:     // byte swap
        !           204:     netbuffer->checksum = ntohl(sw.checksum);
        !           205:     netbuffer->player = sw.player;
        !           206:     netbuffer->retransmitfrom = sw.retransmitfrom;
        !           207:     netbuffer->starttic = sw.starttic;
        !           208:     netbuffer->numtics = sw.numtics;
        !           209: 
        !           210:     for (c=0 ; c< netbuffer->numtics ; c++)
        !           211:     {
        !           212:        netbuffer->cmds[c].forwardmove = sw.cmds[c].forwardmove;
        !           213:        netbuffer->cmds[c].sidemove = sw.cmds[c].sidemove;
        !           214:        netbuffer->cmds[c].angleturn = ntohs(sw.cmds[c].angleturn);
        !           215:        netbuffer->cmds[c].consistancy = ntohs(sw.cmds[c].consistancy);
        !           216:        netbuffer->cmds[c].chatchar = sw.cmds[c].chatchar;
        !           217:        netbuffer->cmds[c].buttons = sw.cmds[c].buttons;
        !           218:     }
        !           219: }
        !           220: 
        !           221: 
        !           222: 
        !           223: int GetLocalAddress (void)
        !           224: {
        !           225:     char               hostname[1024];
        !           226:     struct hostent*    hostentry;      // host information entry
        !           227:     int                        v;
        !           228: 
        !           229:     // get local address
        !           230:     v = gethostname (hostname, sizeof(hostname));
        !           231:     if (v == -1)
        !           232:        I_Error ("GetLocalAddress : gethostname: errno %d",errno);
        !           233:        
        !           234:     hostentry = gethostbyname (hostname);
        !           235:     if (!hostentry)
        !           236:        I_Error ("GetLocalAddress : gethostbyname: couldn't get local host");
        !           237:                
        !           238:     return *(int *)hostentry->h_addr_list[0];
        !           239: }
        !           240: 
        !           241: 
        !           242: //
        !           243: // I_InitNetwork
        !           244: //
        !           245: void I_InitNetwork (void)
        !           246: {
        !           247:     boolean            trueval = true;
        !           248:     int                        i;
        !           249:     int                        p;
        !           250:     struct hostent*    hostentry;      // host information entry
        !           251:        
        !           252:     doomcom = malloc (sizeof (*doomcom) );
        !           253:     memset (doomcom, 0, sizeof(*doomcom) );
        !           254:     
        !           255:     // set up for network
        !           256:     i = M_CheckParm ("-dup");
        !           257:     if (i && i< myargc-1)
        !           258:     {
        !           259:        doomcom->ticdup = myargv[i+1][0]-'0';
        !           260:        if (doomcom->ticdup < 1)
        !           261:            doomcom->ticdup = 1;
        !           262:        if (doomcom->ticdup > 9)
        !           263:            doomcom->ticdup = 9;
        !           264:     }
        !           265:     else
        !           266:        doomcom-> ticdup = 1;
        !           267:        
        !           268:     if (M_CheckParm ("-extratic"))
        !           269:        doomcom-> extratics = 1;
        !           270:     else
        !           271:        doomcom-> extratics = 0;
        !           272:                
        !           273:     p = M_CheckParm ("-port");
        !           274:     if (p && p<myargc-1)
        !           275:     {
        !           276:        DOOMPORT = atoi (myargv[p+1]);
        !           277:        printf ("using alternate port %i\n",DOOMPORT);
        !           278:     }
        !           279:     
        !           280:     // parse network game options,
        !           281:     //  -net <consoleplayer> <host> <host> ...
        !           282:     i = M_CheckParm ("-net");
        !           283:     if (!i)
        !           284:     {
        !           285:        // single player game
        !           286:        netgame = false;
        !           287:        doomcom->id = DOOMCOM_ID;
        !           288:        doomcom->numplayers = doomcom->numnodes = 1;
        !           289:        doomcom->deathmatch = false;
        !           290:        doomcom->consoleplayer = 0;
        !           291:        return;
        !           292:     }
        !           293: 
        !           294:     netsend = PacketSend;
        !           295:     netget = PacketGet;
        !           296:     netgame = true;
        !           297: 
        !           298:     // parse player number and host list
        !           299:     doomcom->consoleplayer = myargv[i+1][0]-'1';
        !           300: 
        !           301:     doomcom->numnodes = 1;     // this node for sure
        !           302:        
        !           303:     i++;
        !           304:     while (++i < myargc && myargv[i][0] != '-')
        !           305:     {
        !           306:        sendaddress[doomcom->numnodes].sin_family = AF_INET;
        !           307:        sendaddress[doomcom->numnodes].sin_port = htons(DOOMPORT);
        !           308:        if (myargv[i][0] == '.')
        !           309:        {
        !           310:            sendaddress[doomcom->numnodes].sin_addr.s_addr 
        !           311:                = inet_addr (myargv[i]+1);
        !           312:        }
        !           313:        else
        !           314:        {
        !           315:            hostentry = gethostbyname (myargv[i]);
        !           316:            if (!hostentry)
        !           317:                I_Error ("gethostbyname: couldn't find %s", myargv[i]);
        !           318:            sendaddress[doomcom->numnodes].sin_addr.s_addr 
        !           319:                = *(int *)hostentry->h_addr_list[0];
        !           320:        }
        !           321:        doomcom->numnodes++;
        !           322:     }
        !           323:        
        !           324:     doomcom->id = DOOMCOM_ID;
        !           325:     doomcom->numplayers = doomcom->numnodes;
        !           326:     
        !           327:     // build message to receive
        !           328:     insocket = UDPsocket ();
        !           329:     BindToLocalPort (insocket,htons(DOOMPORT));
        !           330:     ioctl (insocket, FIONBIO, &trueval);
        !           331: 
        !           332:     sendsocket = UDPsocket ();
        !           333: }
        !           334: 
        !           335: 
        !           336: void I_NetCmd (void)
        !           337: {
        !           338:     if (doomcom->command == CMD_SEND)
        !           339:     {
        !           340:        netsend ();
        !           341:     }
        !           342:     else if (doomcom->command == CMD_GET)
        !           343:     {
        !           344:        netget ();
        !           345:     }
        !           346:     else
        !           347:        I_Error ("Bad net cmd: %i\n",doomcom->command);
        !           348: }
        !           349: 

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