main/netmisc.c

   1 /* $Id: netmisc.c,v 1.9 2003-10-04 19:13:32 btb Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 /*
  16  *
  17  * Misc routines for network.
  18  *
  19  * Old Log:
  20  * Revision 1.1  1995/05/16  15:28:41  allender
  21  * Initial revision
  22  *
  23  * Revision 2.0  1995/02/27  11:27:24  john
  24  * New version 2.0, which has no anonymous unions, builds with
  25  * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
  26  *
  27  * Revision 1.3  1994/11/19  15:19:34  mike
  28  * rip out unused code and data.
  29  *
  30  * Revision 1.2  1994/08/09  19:31:53  john
  31  * Networking changes.
  32  *
  33  * Revision 1.1  1994/08/08  11:06:07  john
  34  * Initial revision
  35  *
  36  *
  37  */
  38
  39 #ifdef HAVE_CONFIG_H
  40 #include <conf.h>
  41 #endif
  42
  43 #ifdef RCS
  44 static char rcsid[] = "$Id: netmisc.c,v 1.9 2003-10-04 19:13:32 btb Exp $";
  45 #endif
  46
  47 #include <stdio.h>
  48 #include <string.h>
  49
  50 #include "inferno.h"
  51 #include "pstypes.h"
  52 #include "mono.h"
  53
  54 #ifdef WORDS_BIGENDIAN
  55
  56 #include "byteswap.h"
  57 #include "segment.h"
  58 #include "gameseg.h"
  59
  60 // routine to calculate the checksum of the segments.  We add these specialized routines
  61 // since the current way is byte order dependent.
  62
  63 void mac_do_checksum_calc(ubyte *b, int len, unsigned int *s1, unsigned int *s2)
  64 {
  65
  66         while(len--) {
  67                 *s1 += *b++;
  68                 if (*s1 >= 255) *s1 -= 255;
  69                 *s2 += *s1;
  70         }
  71 }
  72
  73 ushort mac_calc_segment_checksum()
  74 {
  75         int i, j, k;
  76         unsigned int sum1,sum2;
  77         short s;
  78         int t;
  79
  80         sum1 = sum2 = 0;
  81         for (i = 0; i < Highest_segment_index + 1; i++) {
  82                 for (j = 0; j < MAX_SIDES_PER_SEGMENT; j++) {
  83                         mac_do_checksum_calc(&(Segments[i].sides[j].type), 1, &sum1, &sum2);
  84                         mac_do_checksum_calc(&(Segments[i].sides[j].pad), 1, &sum1, &sum2);
  85                         s = INTEL_SHORT(Segments[i].sides[j].wall_num);
  86                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
  87                         s = INTEL_SHORT(Segments[i].sides[j].tmap_num);
  88                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
  89                         s = INTEL_SHORT(Segments[i].sides[j].tmap_num2);
  90                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
  91                         for (k = 0; k < 4; k++) {
  92                                 t = INTEL_INT(((int)Segments[i].sides[j].uvls[k].u));
  93                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  94                                 t = INTEL_INT(((int)Segments[i].sides[j].uvls[k].v));
  95                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  96                                 t = INTEL_INT(((int)Segments[i].sides[j].uvls[k].l));
  97                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  98                         }
  99                         for (k = 0; k < 2; k++) {
 100                                 t = INTEL_INT(((int)Segments[i].sides[j].normals[k].x));
 101                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
 102                                 t = INTEL_INT(((int)Segments[i].sides[j].normals[k].y));
 103                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
 104                                 t = INTEL_INT(((int)Segments[i].sides[j].normals[k].z));
 105                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
 106                         }
 107                 }
 108                 for (j = 0; j < MAX_SIDES_PER_SEGMENT; j++) {
 109                         s = INTEL_SHORT(Segments[i].children[j]);
 110                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
 111                 }
 112                 for (j = 0; j < MAX_VERTICES_PER_SEGMENT; j++) {
 113                         s = INTEL_SHORT(Segments[i].verts[j]);
 114                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
 115                 }
 116                 t = INTEL_INT(Segments[i].objects);
 117                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
 118         }
 119         sum2 %= 255;
 120         return ((sum1<<8)+ sum2);
 121 }
 122
 123 // this routine totally and completely relies on the fact that the network
 124 //  checksum must be calculated on the segments!!!!!
 125
 126 ushort netmisc_calc_checksum(void * vptr, int len)
 127 {
 128         vptr = vptr;
 129         len = len;
 130         return mac_calc_segment_checksum();
 131 }
 132
 133 // following are routine for macintosh only that will swap the elements of
 134 // structures send through the networking code.  The structures and
 135 // this code must be kept in total sync
 136
 137 #include "ipx.h"
 138 #include "multi.h"
 139 #ifdef NETWORK
 140 #include "network.h"
 141 #endif
 142 #include "object.h"
 143 #include "powerup.h"
 144 #include "error.h"
 145
 146 sbyte out_buffer[IPX_MAX_DATA_SIZE];    // used for tmp netgame packets as well as sending object data
 147
 148 void receive_netplayer_info(ubyte *data, netplayer_info *info)
 149 {
 150         int loc = 0;
 151
 152         memcpy(info->callsign, &(data[loc]), CALLSIGN_LEN+1);       loc += CALLSIGN_LEN+1;
 153         memcpy(&(info->network.ipx.server), &(data[loc]), 4);       loc += 4;
 154         memcpy(&(info->network.ipx.node), &(data[loc]), 6);         loc += 6;
 155         info->version_major = data[loc];                            loc++;
 156         info->version_minor = data[loc];                            loc++;
 157         memcpy(&(info->computer_type), &(data[loc]), 1);            loc++;      // memcpy to avoid compile time warning about enum
 158         info->connected = data[loc];                                loc++;
 159         memcpy(&(info->socket), &(data[loc]), 2);                   loc += 2;
 160         memcpy (&(info->rank),&(data[loc]),1);                      loc++;
 161         // MWA don't think we need to swap this because we need it in high
 162         // order  info->socket = INTEL_SHORT(info->socket);
 163 }
 164
 165 void send_netplayers_packet(ubyte *server, ubyte *node)
 166 {
 167         int i, tmpi;
 168         int loc = 0;
 169         short tmps;
 170
 171         memset(out_buffer, 0, sizeof(out_buffer));
 172         out_buffer[0] = NetPlayers.type;                            loc++;
 173         tmpi = INTEL_INT(NetPlayers.Security);
 174         memcpy(&(out_buffer[loc]), &tmpi, 4);                       loc += 4;
 175         for (i = 0; i < MAX_PLAYERS+4; i++) {
 176                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].callsign, CALLSIGN_LEN+1); loc += CALLSIGN_LEN+1;
 177                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].network.ipx.server, 4);    loc += 4;
 178                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].network.ipx.node, 6);      loc += 6;
 179                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].version_major), 1);      loc++;
 180                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].version_minor), 1);      loc++;
 181                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].computer_type), 1);      loc++;
 182                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].connected), 1);          loc++;
 183                 tmps = INTEL_SHORT(NetPlayers.players[i].socket);
 184                 memcpy(&(out_buffer[loc]), &tmps, 2);                                       loc += 2;
 185                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].rank), 1);               loc++;
 186         }
 187
 188         if ((server == NULL) && (node == NULL))
 189                 ipx_send_broadcast_packet_data(out_buffer, loc);
 190         else
 191                 ipx_send_internetwork_packet_data(out_buffer, loc, server, node);
 192
 193 }
 194
 195 void receive_netplayers_packet(ubyte *data, AllNetPlayers_info *pinfo)
 196 {
 197         int i, loc = 0;
 198
 199         pinfo->type = data[loc];                            loc++;
 200         memcpy(&(pinfo->Security), &(data[loc]), 4);        loc += 4;
 201         pinfo->Security = INTEL_INT(pinfo->Security);
 202         for (i = 0; i < MAX_PLAYERS+4; i++) {
 203                 receive_netplayer_info(&(data[loc]), &(pinfo->players[i]));
 204                 loc += 26;          // sizeof(netplayer_info) on the PC
 205         }
 206 }
 207
 208 void send_sequence_packet(sequence_packet seq, ubyte *server, ubyte *node, ubyte *net_address)
 209 {
 210         short tmps;
 211         int loc, tmpi;
 212
 213         loc = 0;
 214         memset(out_buffer, 0, sizeof(out_buffer));
 215         out_buffer[0] = seq.type;                                       loc++;
 216         tmpi = INTEL_INT(seq.Security);
 217         memcpy(&(out_buffer[loc]), &tmpi, 4);                           loc += 4;       loc += 3;
 218         memcpy(&(out_buffer[loc]), seq.player.callsign, CALLSIGN_LEN+1);loc += CALLSIGN_LEN+1;
 219         memcpy(&(out_buffer[loc]), seq.player.network.ipx.server, 4);   loc += 4;
 220         memcpy(&(out_buffer[loc]), seq.player.network.ipx.node, 6);     loc += 6;
 221         out_buffer[loc] = seq.player.version_major;                     loc++;
 222         out_buffer[loc] = seq.player.version_minor;                     loc++;
 223         out_buffer[loc] = seq.player.computer_type;                     loc++;
 224         out_buffer[loc] = seq.player.connected;                         loc++;
 225         tmps = INTEL_SHORT(seq.player.socket);
 226         memcpy(&(out_buffer[loc]), &tmps, 2);                           loc += 2;
 227         out_buffer[loc]=seq.player.rank;                                loc++;      // for pad byte
 228         if (net_address != NULL)
 229                 ipx_send_packet_data(out_buffer, loc, server, node, net_address);
 230         else if ((server == NULL) && (node == NULL))
 231                 ipx_send_broadcast_packet_data(out_buffer, loc);
 232         else
 233                 ipx_send_internetwork_packet_data(out_buffer, loc, server, node);
 234 }
 235
 236 void receive_sequence_packet(ubyte *data, sequence_packet *seq)
 237 {
 238         int loc = 0;
 239
 240         seq->type = data[0];                        loc++;
 241         memcpy(&(seq->Security), &(data[loc]), 4);  loc += 4;   loc += 3;   // +3 for pad byte
 242         seq->Security = INTEL_INT(seq->Security);
 243         receive_netplayer_info(&(data[loc]), &(seq->player));
 244 }
 245
 246 void send_netgame_packet(ubyte *server, ubyte *node, ubyte *net_address, int lite_flag)     // lite says shorter netgame packets
 247 {
 248         uint tmpi;
 249         ushort tmps; // p;
 250         int i, j;
 251         int loc = 0;
 252
 253         memset(out_buffer, 0, IPX_MAX_DATA_SIZE);
 254         memcpy(&(out_buffer[loc]), &(Netgame.type), 1);                 loc++;
 255         tmpi = INTEL_INT(Netgame.Security);
 256         memcpy(&(out_buffer[loc]), &tmpi, 4);                           loc += 4;
 257         memcpy(&(out_buffer[loc]), Netgame.game_name, NETGAME_NAME_LEN+1);  loc += (NETGAME_NAME_LEN+1);
 258         memcpy(&(out_buffer[loc]), Netgame.mission_title, MISSION_NAME_LEN+1);  loc += (MISSION_NAME_LEN+1);
 259         memcpy(&(out_buffer[loc]), Netgame.mission_name, 9);            loc += 9;
 260         tmpi = INTEL_INT(Netgame.levelnum);
 261         memcpy(&(out_buffer[loc]), &tmpi, 4);                           loc += 4;
 262         memcpy(&(out_buffer[loc]), &(Netgame.gamemode), 1);             loc++;
 263         memcpy(&(out_buffer[loc]), &(Netgame.RefusePlayers), 1);        loc++;
 264         memcpy(&(out_buffer[loc]), &(Netgame.difficulty), 1);           loc++;
 265         memcpy(&(out_buffer[loc]), &(Netgame.game_status), 1);          loc++;
 266         memcpy(&(out_buffer[loc]), &(Netgame.numplayers), 1);           loc++;
 267         memcpy(&(out_buffer[loc]), &(Netgame.max_numplayers), 1);       loc++;
 268         memcpy(&(out_buffer[loc]), &(Netgame.numconnected), 1);         loc++;
 269         memcpy(&(out_buffer[loc]), &(Netgame.game_flags), 1);           loc++;
 270         memcpy(&(out_buffer[loc]), &(Netgame.protocol_version), 1);     loc++;
 271         memcpy(&(out_buffer[loc]), &(Netgame.version_major), 1);        loc++;
 272         memcpy(&(out_buffer[loc]), &(Netgame.version_minor), 1);        loc++;
 273         memcpy(&(out_buffer[loc]), &(Netgame.team_vector), 1);          loc++;
 274
 275         if (lite_flag)
 276                 goto do_send;
 277
 278 // will this work -- damn bitfields -- totally bogus when trying to do
 279 // this type of stuff
 280 // Watcom makes bitfields from left to right.  CW7 on the mac goes
 281 // from right to left.  then they are endian swapped
 282
 283         tmps = *(ushort *)((ubyte *)(&Netgame.team_vector) + 1);    // get the values for the first short bitfield
 284         tmps = INTEL_SHORT(tmps);
 285         memcpy(&(out_buffer[loc]), &tmps, 2);                           loc += 2;
 286
 287         tmps = *(ushort *)((ubyte *)(&Netgame.team_vector) + 3);    // get the values for the second short bitfield
 288         tmps = INTEL_SHORT(tmps);
 289         memcpy(&(out_buffer[loc]), &tmps, 2);                           loc += 2;
 290
 291 #if 0       // removed since I reordered bitfields on mac
 292         p = *(ushort *)((ubyte *)(&Netgame.team_vector) + 1);       // get the values for the first short bitfield
 293         tmps = 0;
 294         for (i = 15; i >= 0; i--) {
 295                 if (p & (1 << i))
 296                         tmps |= (1 << (15 - i));
 297         }
 298         tmps = INTEL_SHORT(tmps);
 299         memcpy(&(out_buffer[loc]), &tmps, 2);                           loc += 2;
 300         p = *(ushort *)((ubyte *)(&Netgame.team_vector) + 3);       // get the values for the second short bitfield
 301         tmps = 0;
 302         for (i = 15; i >= 0; i--) {
 303                 if (p & (1 << i))
 304                         tmps |= (1 << (15 - i));
 305         }
 306         tmps = INTEL_SHORT(tmps);
 307         memcpy(&(out_buffer[loc]), &tmps, 2);                           loc += 2;
 308 #endif
 309
 310         memcpy(&(out_buffer[loc]), Netgame.team_name, 2*(CALLSIGN_LEN+1)); loc += 2*(CALLSIGN_LEN+1);
 311         for (i = 0; i < MAX_PLAYERS; i++) {
 312                 tmpi = INTEL_INT(Netgame.locations[i]);
 313                 memcpy(&(out_buffer[loc]), &tmpi, 4);       loc += 4;   // SWAP HERE!!!
 314         }
 315
 316         for (i = 0; i < MAX_PLAYERS; i++) {
 317                 for (j = 0; j < MAX_PLAYERS; j++) {
 318                         tmps = INTEL_SHORT(Netgame.kills[i][j]);
 319                         memcpy(&(out_buffer[loc]), &tmps, 2);   loc += 2;   // SWAP HERE!!!
 320                 }
 321         }
 322
 323         tmps = INTEL_SHORT(Netgame.segments_checksum);
 324         memcpy(&(out_buffer[loc]), &tmps, 2);           loc += 2;   // SWAP_HERE
 325         tmps = INTEL_SHORT(Netgame.team_kills[0]);
 326         memcpy(&(out_buffer[loc]), &tmps, 2);           loc += 2;   // SWAP_HERE
 327         tmps = INTEL_SHORT(Netgame.team_kills[1]);
 328         memcpy(&(out_buffer[loc]), &tmps, 2);           loc += 2;   // SWAP_HERE
 329         for (i = 0; i < MAX_PLAYERS; i++) {
 330                 tmps = INTEL_SHORT(Netgame.killed[i]);
 331                 memcpy(&(out_buffer[loc]), &tmps, 2);       loc += 2;   // SWAP HERE!!!
 332         }
 333         for (i = 0; i < MAX_PLAYERS; i++) {
 334                 tmps = INTEL_SHORT(Netgame.player_kills[i]);
 335                 memcpy(&(out_buffer[loc]), &tmps, 2);       loc += 2;   // SWAP HERE!!!
 336         }
 337
 338         tmpi = INTEL_INT(Netgame.KillGoal);
 339         memcpy(&(out_buffer[loc]), &tmpi, 4);           loc += 4;   // SWAP_HERE
 340         tmpi = INTEL_INT(Netgame.PlayTimeAllowed);
 341         memcpy(&(out_buffer[loc]), &tmpi, 4);           loc += 4;   // SWAP_HERE
 342         tmpi = INTEL_INT(Netgame.level_time);
 343         memcpy(&(out_buffer[loc]), &tmpi, 4);           loc += 4;   // SWAP_HERE
 344         tmpi = INTEL_INT(Netgame.control_invul_time);
 345         memcpy(&(out_buffer[loc]), &tmpi, 4);           loc += 4;   // SWAP_HERE
 346         tmpi = INTEL_INT(Netgame.monitor_vector);
 347         memcpy(&(out_buffer[loc]), &tmpi, 4);           loc += 4;   // SWAP_HERE
 348         for (i = 0; i < MAX_PLAYERS; i++) {
 349                 tmpi = INTEL_INT(Netgame.player_score[i]);
 350                 memcpy(&(out_buffer[loc]), &tmpi, 4);       loc += 4;   // SWAP_HERE
 351         }
 352         for (i = 0; i < MAX_PLAYERS; i++) {
 353                 memcpy(&(out_buffer[loc]), &(Netgame.player_flags[i]), 1); loc++;
 354         }
 355         tmps = INTEL_SHORT(Netgame.PacketsPerSec);
 356         memcpy(&(out_buffer[loc]), &tmps, 2);                   loc += 2;
 357         memcpy(&(out_buffer[loc]), &(Netgame.ShortPackets), 1); loc ++;
 358
 359 do_send:
 360         if (net_address != NULL)
 361                 ipx_send_packet_data(out_buffer, loc, server, node, net_address);
 362         else if ((server == NULL) && (node == NULL))
 363                 ipx_send_broadcast_packet_data(out_buffer, loc);
 364         else
 365                 ipx_send_internetwork_packet_data(out_buffer, loc, server, node);
 366 }
 367
 368 void receive_netgame_packet(ubyte *data, netgame_info *netgame, int lite_flag)
 369 {
 370         int i, j;
 371         int loc = 0;
 372         short bitfield; // new_field;
 373
 374         memcpy(&(netgame->type), &(data[loc]), 1);                      loc++;
 375         memcpy(&(netgame->Security), &(data[loc]), 4);                  loc += 4;
 376         netgame->Security = INTEL_INT(netgame->Security);
 377         memcpy(netgame->game_name, &(data[loc]), NETGAME_NAME_LEN+1);   loc += (NETGAME_NAME_LEN+1);
 378         memcpy(netgame->mission_title, &(data[loc]), MISSION_NAME_LEN+1); loc += (MISSION_NAME_LEN+1);
 379         memcpy(netgame->mission_name, &(data[loc]), 9);                 loc += 9;
 380         memcpy(&(netgame->levelnum), &(data[loc]), 4);                  loc += 4;
 381         netgame->levelnum = INTEL_INT(netgame->levelnum);
 382         memcpy(&(netgame->gamemode), &(data[loc]), 1);                  loc++;
 383         memcpy(&(netgame->RefusePlayers), &(data[loc]), 1);             loc++;
 384         memcpy(&(netgame->difficulty), &(data[loc]), 1);                loc++;
 385         memcpy(&(netgame->game_status), &(data[loc]), 1);               loc++;
 386         memcpy(&(netgame->numplayers), &(data[loc]), 1);                loc++;
 387         memcpy(&(netgame->max_numplayers), &(data[loc]), 1);            loc++;
 388         memcpy(&(netgame->numconnected), &(data[loc]), 1);              loc++;
 389         memcpy(&(netgame->game_flags), &(data[loc]), 1);                loc++;
 390         memcpy(&(netgame->protocol_version), &(data[loc]), 1);          loc++;
 391         memcpy(&(netgame->version_major), &(data[loc]), 1);             loc++;
 392         memcpy(&(netgame->version_minor), &(data[loc]), 1);             loc++;
 393         memcpy(&(netgame->team_vector), &(data[loc]), 1);               loc++;
 394
 395         if (lite_flag)
 396                 return;
 397
 398         memcpy(&bitfield, &(data[loc]), 2);                             loc += 2;
 399         bitfield = INTEL_SHORT(bitfield);
 400         memcpy(((ubyte *)(&netgame->team_vector) + 1), &bitfield, 2);
 401
 402         memcpy(&bitfield, &(data[loc]), 2);                             loc += 2;
 403         bitfield = INTEL_SHORT(bitfield);
 404         memcpy(((ubyte *)(&netgame->team_vector) + 3), &bitfield, 2);
 405
 406 #if 0       // not used since reordering mac bitfields
 407         memcpy(&bitfield, &(data[loc]), 2);                             loc += 2;
 408         new_field = 0;
 409         for (i = 15; i >= 0; i--) {
 410                 if (bitfield & (1 << i))
 411                         new_field |= (1 << (15 - i));
 412         }
 413         new_field = INTEL_SHORT(new_field);
 414         memcpy(((ubyte *)(&netgame->team_vector) + 1), &new_field, 2);
 415
 416         memcpy(&bitfield, &(data[loc]), 2);                             loc += 2;
 417         new_field = 0;
 418         for (i = 15; i >= 0; i--) {
 419                 if (bitfield & (1 << i))
 420                         new_field |= (1 << (15 - i));
 421         }
 422         new_field = INTEL_SHORT(new_field);
 423         memcpy(((ubyte *)(&netgame->team_vector) + 3), &new_field, 2);
 424 #endif
 425
 426         memcpy(netgame->team_name, &(data[loc]), 2*(CALLSIGN_LEN+1));   loc += 2*(CALLSIGN_LEN+1);
 427         for (i = 0; i < MAX_PLAYERS; i++) {
 428                 memcpy(&(netgame->locations[i]), &(data[loc]), 4);          loc += 4;
 429                 netgame->locations[i] = INTEL_INT(netgame->locations[i]);
 430         }
 431
 432         for (i = 0; i < MAX_PLAYERS; i++) {
 433                 for (j = 0; j < MAX_PLAYERS; j++) {
 434                         memcpy(&(netgame->kills[i][j]), &(data[loc]), 2);       loc += 2;
 435                         netgame->kills[i][j] = INTEL_SHORT(netgame->kills[i][j]);
 436                 }
 437         }
 438
 439         memcpy(&(netgame->segments_checksum), &(data[loc]), 2);         loc += 2;
 440         netgame->segments_checksum = INTEL_SHORT(netgame->segments_checksum);
 441         memcpy(&(netgame->team_kills[0]), &(data[loc]), 2);             loc += 2;
 442         netgame->team_kills[0] = INTEL_SHORT(netgame->team_kills[0]);
 443         memcpy(&(netgame->team_kills[1]), &(data[loc]), 2);             loc += 2;
 444         netgame->team_kills[1] = INTEL_SHORT(netgame->team_kills[1]);
 445         for (i = 0; i < MAX_PLAYERS; i++) {
 446                 memcpy(&(netgame->killed[i]), &(data[loc]), 2);             loc += 2;
 447                 netgame->killed[i] = INTEL_SHORT(netgame->killed[i]);
 448         }
 449         for (i = 0; i < MAX_PLAYERS; i++) {
 450                 memcpy(&(netgame->player_kills[i]), &(data[loc]), 2);       loc += 2;
 451                 netgame->player_kills[i] = INTEL_SHORT(netgame->player_kills[i]);
 452         }
 453         memcpy(&(netgame->KillGoal), &(data[loc]), 4);                  loc += 4;
 454         netgame->KillGoal = INTEL_INT(netgame->KillGoal);
 455         memcpy(&(netgame->PlayTimeAllowed), &(data[loc]), 4);           loc += 4;
 456         netgame->PlayTimeAllowed = INTEL_INT(netgame->PlayTimeAllowed);
 457
 458         memcpy(&(netgame->level_time), &(data[loc]), 4);                loc += 4;
 459         netgame->level_time = INTEL_INT(netgame->level_time);
 460         memcpy(&(netgame->control_invul_time), &(data[loc]), 4);        loc += 4;
 461         netgame->control_invul_time = INTEL_INT(netgame->control_invul_time);
 462         memcpy(&(netgame->monitor_vector), &(data[loc]), 4);            loc += 4;
 463         netgame->monitor_vector = INTEL_INT(netgame->monitor_vector);
 464         for (i = 0; i < MAX_PLAYERS; i++) {
 465                 memcpy(&(netgame->player_score[i]), &(data[loc]), 4);       loc += 4;
 466                 netgame->player_score[i] = INTEL_INT(netgame->player_score[i]);
 467         }
 468         for (i = 0; i < MAX_PLAYERS; i++) {
 469                 memcpy(&(netgame->player_flags[i]), &(data[loc]), 1);       loc++;
 470         }
 471         memcpy(&(netgame->PacketsPerSec), &(data[loc]), 2);             loc += 2;
 472         netgame->PacketsPerSec = INTEL_SHORT(netgame->PacketsPerSec);
 473         memcpy(&(netgame->ShortPackets), &(data[loc]), 1);              loc ++;
 474
 475 }
 476
 477 void swap_object(object *obj)
 478 {
 479         // swap the short and int entries for this object
 480         obj->signature     = INTEL_INT(obj->signature);
 481         obj->next          = INTEL_SHORT(obj->next);
 482         obj->prev          = INTEL_SHORT(obj->prev);
 483         obj->segnum        = INTEL_SHORT(obj->segnum);
 484         obj->pos.x         = INTEL_INT(obj->pos.x);
 485         obj->pos.y         = INTEL_INT(obj->pos.y);
 486         obj->pos.z         = INTEL_INT(obj->pos.z);
 487
 488         obj->orient.rvec.x = INTEL_INT(obj->orient.rvec.x);
 489         obj->orient.rvec.y = INTEL_INT(obj->orient.rvec.y);
 490         obj->orient.rvec.z = INTEL_INT(obj->orient.rvec.z);
 491         obj->orient.fvec.x = INTEL_INT(obj->orient.fvec.x);
 492         obj->orient.fvec.y = INTEL_INT(obj->orient.fvec.y);
 493         obj->orient.fvec.z = INTEL_INT(obj->orient.fvec.z);
 494         obj->orient.uvec.x = INTEL_INT(obj->orient.uvec.x);
 495         obj->orient.uvec.y = INTEL_INT(obj->orient.uvec.y);
 496         obj->orient.uvec.z = INTEL_INT(obj->orient.uvec.z);
 497
 498         obj->size          = INTEL_INT(obj->size);
 499         obj->shields       = INTEL_INT(obj->shields);
 500
 501         obj->last_pos.x    = INTEL_INT(obj->last_pos.x);
 502         obj->last_pos.y    = INTEL_INT(obj->last_pos.y);
 503         obj->last_pos.z    = INTEL_INT(obj->last_pos.z);
 504
 505         obj->lifeleft      = INTEL_INT(obj->lifeleft);
 506
 507         switch (obj->movement_type) {
 508
 509         case MT_PHYSICS:
 510
 511                 obj->mtype.phys_info.velocity.x = INTEL_INT(obj->mtype.phys_info.velocity.x);
 512                 obj->mtype.phys_info.velocity.y = INTEL_INT(obj->mtype.phys_info.velocity.y);
 513                 obj->mtype.phys_info.velocity.z = INTEL_INT(obj->mtype.phys_info.velocity.z);
 514
 515                 obj->mtype.phys_info.thrust.x   = INTEL_INT(obj->mtype.phys_info.thrust.x);
 516                 obj->mtype.phys_info.thrust.y   = INTEL_INT(obj->mtype.phys_info.thrust.y);
 517                 obj->mtype.phys_info.thrust.z   = INTEL_INT(obj->mtype.phys_info.thrust.z);
 518
 519                 obj->mtype.phys_info.mass       = INTEL_INT(obj->mtype.phys_info.mass);
 520                 obj->mtype.phys_info.drag       = INTEL_INT(obj->mtype.phys_info.drag);
 521                 obj->mtype.phys_info.brakes     = INTEL_INT(obj->mtype.phys_info.brakes);
 522
 523                 obj->mtype.phys_info.rotvel.x   = INTEL_INT(obj->mtype.phys_info.rotvel.x);
 524                 obj->mtype.phys_info.rotvel.y   = INTEL_INT(obj->mtype.phys_info.rotvel.y);
 525                 obj->mtype.phys_info.rotvel.z   = INTEL_INT(obj->mtype.phys_info.rotvel.z);
 526
 527                 obj->mtype.phys_info.rotthrust.x = INTEL_INT(obj->mtype.phys_info.rotthrust.x);
 528                 obj->mtype.phys_info.rotthrust.y = INTEL_INT(obj->mtype.phys_info.rotthrust.y);
 529                 obj->mtype.phys_info.rotthrust.z = INTEL_INT(obj->mtype.phys_info.rotthrust.z);
 530
 531                 obj->mtype.phys_info.turnroll   = INTEL_INT(obj->mtype.phys_info.turnroll);
 532                 obj->mtype.phys_info.flags      = INTEL_SHORT(obj->mtype.phys_info.flags);
 533
 534                 break;
 535
 536         case MT_SPINNING:
 537
 538                 obj->mtype.spin_rate.x = INTEL_INT(obj->mtype.spin_rate.x);
 539                 obj->mtype.spin_rate.y = INTEL_INT(obj->mtype.spin_rate.y);
 540                 obj->mtype.spin_rate.z = INTEL_INT(obj->mtype.spin_rate.z);
 541                 break;
 542         }
 543
 544         switch (obj->control_type) {
 545
 546         case CT_WEAPON:
 547                 obj->ctype.laser_info.parent_type       = INTEL_SHORT(obj->ctype.laser_info.parent_type);
 548                 obj->ctype.laser_info.parent_num        = INTEL_SHORT(obj->ctype.laser_info.parent_num);
 549                 obj->ctype.laser_info.parent_signature  = INTEL_INT(obj->ctype.laser_info.parent_signature);
 550                 obj->ctype.laser_info.creation_time     = INTEL_INT(obj->ctype.laser_info.creation_time);
 551                 obj->ctype.laser_info.last_hitobj       = INTEL_SHORT(obj->ctype.laser_info.last_hitobj);
 552                 obj->ctype.laser_info.track_goal        = INTEL_SHORT(obj->ctype.laser_info.track_goal);
 553                 obj->ctype.laser_info.multiplier        = INTEL_INT(obj->ctype.laser_info.multiplier);
 554                 break;
 555
 556         case CT_EXPLOSION:
 557                 obj->ctype.expl_info.spawn_time     = INTEL_INT(obj->ctype.expl_info.spawn_time);
 558                 obj->ctype.expl_info.delete_time    = INTEL_INT(obj->ctype.expl_info.delete_time);
 559                 obj->ctype.expl_info.delete_objnum  = INTEL_SHORT(obj->ctype.expl_info.delete_objnum);
 560                 obj->ctype.expl_info.attach_parent  = INTEL_SHORT(obj->ctype.expl_info.attach_parent);
 561                 obj->ctype.expl_info.prev_attach    = INTEL_SHORT(obj->ctype.expl_info.prev_attach);
 562                 obj->ctype.expl_info.next_attach    = INTEL_SHORT(obj->ctype.expl_info.next_attach);
 563                 break;
 564
 565         case CT_AI:
 566                 obj->ctype.ai_info.hide_segment         = INTEL_SHORT(obj->ctype.ai_info.hide_segment);
 567                 obj->ctype.ai_info.hide_index           = INTEL_SHORT(obj->ctype.ai_info.hide_index);
 568                 obj->ctype.ai_info.path_length          = INTEL_SHORT(obj->ctype.ai_info.path_length);
 569                 obj->ctype.ai_info.danger_laser_num     = INTEL_SHORT(obj->ctype.ai_info.danger_laser_num);
 570                 obj->ctype.ai_info.danger_laser_signature = INTEL_INT(obj->ctype.ai_info.danger_laser_signature);
 571                 obj->ctype.ai_info.dying_start_time     = INTEL_INT(obj->ctype.ai_info.dying_start_time);
 572                 break;
 573
 574         case CT_LIGHT:
 575                 obj->ctype.light_info.intensity = INTEL_INT(obj->ctype.light_info.intensity);
 576                 break;
 577
 578         case CT_POWERUP:
 579                 obj->ctype.powerup_info.count = INTEL_INT(obj->ctype.powerup_info.count);
 580                 obj->ctype.powerup_info.creation_time = INTEL_INT(obj->ctype.powerup_info.creation_time);
 581                 // Below commented out 5/2/96 by Matt.  I asked Allender why it was
 582                 // here, and he didn't know, and it looks like it doesn't belong.
 583                 // if (obj->id == POW_VULCAN_WEAPON)
 584                 // obj->ctype.powerup_info.count = VULCAN_WEAPON_AMMO_AMOUNT;
 585                 break;
 586
 587         }
 588
 589         switch (obj->render_type) {
 590
 591         case RT_MORPH:
 592         case RT_POLYOBJ: {
 593                 int i;
 594
 595                 obj->rtype.pobj_info.model_num      = INTEL_INT(obj->rtype.pobj_info.model_num);
 596
 597                 for (i=0;i<MAX_SUBMODELS;i++) {
 598                         obj->rtype.pobj_info.anim_angles[i].p = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].p);
 599                         obj->rtype.pobj_info.anim_angles[i].b = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].b);
 600                         obj->rtype.pobj_info.anim_angles[i].h = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].h);
 601                 }
 602
 603                 obj->rtype.pobj_info.subobj_flags   = INTEL_INT(obj->rtype.pobj_info.subobj_flags);
 604                 obj->rtype.pobj_info.tmap_override  = INTEL_INT(obj->rtype.pobj_info.tmap_override);
 605                 obj->rtype.pobj_info.alt_textures   = INTEL_INT(obj->rtype.pobj_info.alt_textures);
 606                 break;
 607         }
 608
 609         case RT_WEAPON_VCLIP:
 610         case RT_HOSTAGE:
 611         case RT_POWERUP:
 612         case RT_FIREBALL:
 613                 obj->rtype.vclip_info.vclip_num = INTEL_INT(obj->rtype.vclip_info.vclip_num);
 614                 obj->rtype.vclip_info.frametime = INTEL_INT(obj->rtype.vclip_info.frametime);
 615                 break;
 616
 617         case RT_LASER:
 618                 break;
 619
 620         }
 621 //  END OF SWAPPING OBJECT STRUCTURE
 622
 623 }
 624
 625 #else /* !WORDS_BIGENDIAN */
 626
 627
 628 // Calculates the checksum of a block of memory.
 629 ushort netmisc_calc_checksum(void * vptr, int len)
 630 {
 631         ubyte *ptr = (ubyte *)vptr;
 632         unsigned int sum1,sum2;
 633
 634         sum1 = sum2 = 0;
 635
 636         while(len--) {
 637                 sum1 += *ptr++;
 638                 if (sum1 >= 255) sum1 -= 255;
 639                 sum2 += sum1;
 640         }
 641         sum2 %= 255;
 642
 643         return ((sum1<<8)+ sum2);
 644 }
 645
 646 #endif /* WORDS_BIGENDIAN */
 647
 648 //--unused-- //Finds the difference between block1 and block2.  Fills in diff_buffer and
 649 //--unused-- //returns the size of diff_buffer.
 650 //--unused-- int netmisc_find_diff(void *block1, void *block2, int block_size, void *diff_buffer)
 651 //--unused-- {
 652 //--unused--    int mode;
 653 //--unused--    ushort *c1, *c2, *diff_start, *c3;
 654 //--unused--    int i, j, size, diff, n , same;
 655 //--unused--
 656 //--unused--    size=(block_size+1)/sizeof(ushort);
 657 //--unused--    c1 = (ushort *)block1;
 658 //--unused--    c2 = (ushort *)block2;
 659 //--unused--    c3 = (ushort *)diff_buffer;
 660 //--unused--
 661 //--unused--    mode = same = diff = n = 0;
 662 //--unused--
 663 //--unused--    //mprintf(0, "=================================\n");
 664 //--unused--
 665 //--unused--    for (i=0; i<size; i++, c1++, c2++) {
 666 //--unused--            if (*c1 != *c2) {
 667 //--unused--                    if (mode==0) {
 668 //--unused--                            mode = 1;
 669 //--unused--                            //mprintf(0, "%ds ", same);
 670 //--unused--                            c3[n++] = same;
 671 //--unused--                            same=0; diff=0;
 672 //--unused--                            diff_start = c2;
 673 //--unused--                    }
 674 //--unused--                    *c1 = *c2;
 675 //--unused--                    diff++;
 676 //--unused--                    if (diff==65535) {
 677 //--unused--                            mode = 0;
 678 //--unused--                            // send how many diff ones.
 679 //--unused--                            //mprintf(0, "%dd ", diff);
 680 //--unused--                            c3[n++]=diff;
 681 //--unused--                            // send all the diff ones.
 682 //--unused--                            for (j=0; j<diff; j++)
 683 //--unused--                                    c3[n++] = diff_start[j];
 684 //--unused--                            same=0; diff=0;
 685 //--unused--                            diff_start = c2;
 686 //--unused--                    }
 687 //--unused--            } else {
 688 //--unused--                    if (mode==1) {
 689 //--unused--                            mode=0;
 690 //--unused--                            // send how many diff ones.
 691 //--unused--                            //mprintf(0, "%dd ", diff);
 692 //--unused--                            c3[n++]=diff;
 693 //--unused--                            // send all the diff ones.
 694 //--unused--                            for (j=0; j<diff; j++)
 695 //--unused--                                    c3[n++] = diff_start[j];
 696 //--unused--                            same=0; diff=0;
 697 //--unused--                            diff_start = c2;
 698 //--unused--                    }
 699 //--unused--                    same++;
 700 //--unused--                    if (same==65535) {
 701 //--unused--                            mode=1;
 702 //--unused--                            // send how many the same
 703 //--unused--                            //mprintf(0, "%ds ", same);
 704 //--unused--                            c3[n++] = same;
 705 //--unused--                            same=0; diff=0;
 706 //--unused--                            diff_start = c2;
 707 //--unused--                    }
 708 //--unused--            }
 709 //--unused--
 710 //--unused--    }
 711 //--unused--    if (mode==0) {
 712 //--unused--            // send how many the same
 713 //--unused--            //mprintf(0, "%ds ", same);
 714 //--unused--            c3[n++] = same;
 715 //--unused--    } else {
 716 //--unused--            // send how many diff ones.
 717 //--unused--            //mprintf(0, "%dd ", diff);
 718 //--unused--            c3[n++]=diff;
 719 //--unused--            // send all the diff ones.
 720 //--unused--            for (j=0; j<diff; j++)
 721 //--unused--                    c3[n++] = diff_start[j];
 722 //--unused--    }
 723 //--unused--
 724 //--unused--    //mprintf(0, "=================================\n");
 725 //--unused--
 726 //--unused--    return n*2;
 727 //--unused-- }
 728
 729 //--unused-- //Applies diff_buffer to block1 to create a new block1.  Returns the final
 730 //--unused-- //size of block1.
 731 //--unused-- int netmisc_apply_diff(void *block1, void *diff_buffer, int diff_size)
 732 //--unused-- {
 733 //--unused--    unsigned int i, j, n, size;
 734 //--unused--    ushort *c1, *c2;
 735 //--unused--
 736 //--unused--    //mprintf(0, "=================================\n");
 737 //--unused--    c1 = (ushort *)diff_buffer;
 738 //--unused--    c2 = (ushort *)block1;
 739 //--unused--
 740 //--unused--    size = diff_size/2;
 741 //--unused--
 742 //--unused--    i=j=0;
 743 //--unused--    while (1) {
 744 //--unused--            j += c1[i];         // Same
 745 //--unused--            //mprintf(0, "%ds ", c1[i]);
 746 //--unused--            i++;
 747 //--unused--            if (i>=size) break;
 748 //--unused--            n = c1[i];          // ndiff
 749 //--unused--            //mprintf(0, "%dd ", c1[i]);
 750 //--unused--            i++;
 751 //--unused--            if (n>0) {
 752 //--unused--                    //Assert(n* < 256);
 753 //--unused--                    memcpy(&c2[j], &c1[i], n*2);
 754 //--unused--                    i += n;
 755 //--unused--                    j += n;
 756 //--unused--            }
 757 //--unused--            if (i>=size) break;
 758 //--unused--    }
 759 //--unused--    //mprintf(0, "=================================\n");
 760 //--unused--
 761 //--unused--    return j*2;
 762 //--unused-- }