main/netmisc.c

   1 /*
   2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   3 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   4 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   5 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   6 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   7 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   8 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
   9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  11 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 #ifdef HAVE_CONFIG_H
  15 #include <conf.h>
  16 #endif
  17
  18 #ifdef RCS
  19 static char rcsid[] = "$Id: netmisc.c,v 1.7 2002-12-31 23:19:42 btb Exp $";
  20 #endif
  21
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 #include "inferno.h"
  26 #include "pstypes.h"
  27 #include "mono.h"
  28
  29 #ifdef WORDS_BIGENDIAN
  30
  31 #include "byteswap.h"
  32 #include "segment.h"
  33 #include "gameseg.h"
  34
  35 // routine to calculate the checksum of the segments.  We add these specialized routines
  36 // since the current way is byte order dependent.
  37
  38 void mac_do_checksum_calc(ubyte *b, int len, unsigned int *s1, unsigned int *s2)
  39 {
  40
  41         while(len--)    {
  42                 *s1 += *b++;
  43                 if (*s1 >= 255 ) *s1 -= 255;
  44                 *s2 += *s1;
  45         }
  46 }
  47
  48 ushort mac_calc_segment_checksum()
  49 {
  50         int i, j, k;
  51         unsigned int sum1,sum2;
  52         short s;
  53         int t;
  54
  55         sum1 = sum2 = 0;
  56         for (i = 0; i < Highest_segment_index + 1; i++) {
  57                 for (j = 0; j < MAX_SIDES_PER_SEGMENT; j++) {
  58                         mac_do_checksum_calc(&(Segments[i].sides[j].type), 1, &sum1, &sum2);
  59                         mac_do_checksum_calc(&(Segments[i].sides[j].pad), 1, &sum1, &sum2);
  60                         s = INTEL_SHORT(Segments[i].sides[j].wall_num);
  61                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
  62                         s = INTEL_SHORT(Segments[i].sides[j].tmap_num);
  63                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
  64                         s = INTEL_SHORT(Segments[i].sides[j].tmap_num2);
  65                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
  66                         for (k = 0; k < 4; k++) {
  67                                 t = INTEL_INT(((int)Segments[i].sides[j].uvls[k].u));
  68                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  69                                 t = INTEL_INT(((int)Segments[i].sides[j].uvls[k].v));
  70                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  71                                 t = INTEL_INT(((int)Segments[i].sides[j].uvls[k].l));
  72                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  73                         }
  74                         for (k = 0; k < 2; k++) {
  75                                 t = INTEL_INT(((int)Segments[i].sides[j].normals[k].x));
  76                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  77                                 t = INTEL_INT(((int)Segments[i].sides[j].normals[k].y));
  78                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  79                                 t = INTEL_INT(((int)Segments[i].sides[j].normals[k].z));
  80                                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  81                         }
  82                 }
  83                 for (j = 0; j < MAX_SIDES_PER_SEGMENT; j++) {
  84                         s = INTEL_SHORT(Segments[i].children[j]);
  85                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
  86                 }
  87                 for (j = 0; j < MAX_VERTICES_PER_SEGMENT; j++) {
  88                         s = INTEL_SHORT(Segments[i].verts[j]);
  89                         mac_do_checksum_calc((ubyte *)&s, 2, &sum1, &sum2);
  90                 }
  91                 t = INTEL_INT(Segments[i].objects);
  92                 mac_do_checksum_calc((ubyte *)&t, 4, &sum1, &sum2);
  93         }
  94         sum2 %= 255;
  95         return ((sum1<<8)+ sum2);
  96 }
  97
  98 // this routine totally and completely relies on the fact that the network
  99 //  checksum must be calculated on the segments!!!!!
 100
 101 ushort netmisc_calc_checksum( void * vptr, int len )
 102 {
 103         vptr = vptr;
 104         len = len;
 105         return mac_calc_segment_checksum();
 106 }
 107
 108 // Calculates the checksum of a block of memory.
 109 ushort netmisc_calc_checksum_pc( void * vptr, int len )
 110 {
 111         ubyte * ptr = (ubyte *)vptr;
 112         unsigned int sum1,sum2;
 113
 114         sum1 = sum2 = 0;
 115
 116         while(len--)    {
 117                 sum1 += *ptr++;
 118                 if (sum1 >= 255 ) sum1 -= 255;
 119                 sum2 += sum1;
 120         }
 121         sum2 %= 255;
 122
 123         return ((sum1<<8)+ sum2);
 124 }
 125
 126 // following are routine for macintosh only that will swap the elements of
 127 // structures send through the networking code.  The structures and
 128 // this code must be kept in total sync
 129
 130 #include "ipx.h"
 131 #include "multi.h"
 132 #ifdef NETWORK
 133 #include "network.h"
 134 #endif
 135 #include "object.h"
 136 #include "powerup.h"
 137 #include "error.h"
 138
 139 byte out_buffer[IPX_MAX_DATA_SIZE];             // used for tmp netgame packets as well as sending object data
 140
 141 void receive_netplayer_info(ubyte *data, netplayer_info *info)
 142 {
 143         int loc = 0;
 144
 145         memcpy(info->callsign, &(data[loc]), CALLSIGN_LEN+1);       loc += CALLSIGN_LEN+1;
 146         memcpy(&(info->network.ipx.server), &(data[loc]), 4);       loc += 4;
 147         memcpy(&(info->network.ipx.node), &(data[loc]), 6);         loc += 6;
 148         info->version_major = data[loc];                            loc++;
 149         info->version_minor = data[loc];                            loc++;
 150         memcpy(&(info->computer_type), &(data[loc]), 1);            loc++;      // memcpy to avoid compile time warning about enum
 151         info->connected = data[loc];                                loc++;
 152         memcpy(&(info->socket), &(data[loc]), 2);                   loc += 2;
 153         memcpy (&(info->rank),&(data[loc]),1);                      loc++;
 154 //MWA  don't think we need to swap this because we need it in high order    info->socket = INTEL_SHORT(info->socket);
 155 }
 156
 157 void send_netplayers_packet(ubyte *server, ubyte *node)
 158 {
 159         int i, tmpi;
 160         int loc = 0;
 161         short tmps;
 162
 163         memset(out_buffer, 0, sizeof(out_buffer));
 164         out_buffer[0] = NetPlayers.type;                                                loc++;
 165         tmpi = INTEL_INT(NetPlayers.Security);
 166         memcpy(&(out_buffer[loc]), &tmpi, 4);                                   loc += 4;
 167         for (i = 0; i < MAX_PLAYERS+4; i++) {
 168                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].callsign, CALLSIGN_LEN+1);     loc += CALLSIGN_LEN+1;
 169                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].network.ipx.server, 4);                                loc += 4;
 170                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].network.ipx.node, 6);                                  loc += 6;
 171                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].version_major), 1);          loc++;
 172                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].version_minor), 1);          loc++;
 173                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].computer_type), 1);          loc++;
 174                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].connected), 1);                      loc++;
 175                 tmps = INTEL_SHORT(NetPlayers.players[i].socket);
 176                 memcpy(&(out_buffer[loc]), &tmps, 2);                                                                           loc += 2;
 177                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].rank), 1);                   loc++;
 178         }
 179
 180         if ((server == NULL) && (node == NULL))
 181                 ipx_send_broadcast_packet_data( out_buffer, loc );
 182         else
 183                 ipx_send_internetwork_packet_data( out_buffer, loc, server, node);
 184
 185 }
 186
 187 void receive_netplayers_packet(ubyte *data, AllNetPlayers_info *pinfo)
 188 {
 189         int i, loc = 0;
 190
 191         pinfo->type = data[loc];                                                        loc++;
 192         memcpy(&(pinfo->Security), &(data[loc]), 4);            loc += 4;
 193         pinfo->Security = INTEL_INT(pinfo->Security);
 194         for (i = 0; i < MAX_PLAYERS+4; i++) {
 195                 receive_netplayer_info(&(data[loc]), &(pinfo->players[i]));
 196                 loc += 26;                      // sizeof(netplayer_info) on the PC
 197         }
 198 }
 199
 200 void send_sequence_packet(sequence_packet seq, ubyte *server, ubyte *node, ubyte *net_address)
 201 {
 202         short tmps;
 203         int loc, tmpi;
 204
 205         loc = 0;
 206         memset(out_buffer, 0, sizeof(out_buffer));
 207         out_buffer[0] = seq.type;                                                                               loc++;
 208         tmpi = INTEL_INT(seq.Security);
 209         memcpy(&(out_buffer[loc]), &tmpi, 4);                                                   loc += 4;               loc += 3;
 210         memcpy(&(out_buffer[loc]), seq.player.callsign, CALLSIGN_LEN+1);loc += CALLSIGN_LEN+1;
 211         memcpy(&(out_buffer[loc]), seq.player.network.ipx.server, 4);                           loc += 4;
 212         memcpy(&(out_buffer[loc]), seq.player.network.ipx.node, 6);                                     loc += 6;
 213         out_buffer[loc] = seq.player.version_major;                                             loc++;
 214         out_buffer[loc] = seq.player.version_minor;                                             loc++;
 215         out_buffer[loc] = seq.player.computer_type;                                             loc++;
 216         out_buffer[loc] = seq.player.connected;                                                 loc++;
 217         tmps = INTEL_SHORT(seq.player.socket);
 218         memcpy(&(out_buffer[loc]), &tmps, 2);                                                   loc += 2;
 219    out_buffer[loc]=seq.player.rank;                                                                     loc++;          // for pad byte
 220         if (net_address != NULL)
 221                 ipx_send_packet_data( out_buffer, loc, server, node, net_address);
 222         else if ((server == NULL) && (node == NULL))
 223                 ipx_send_broadcast_packet_data( out_buffer, loc );
 224         else
 225                 ipx_send_internetwork_packet_data( out_buffer, loc, server, node);
 226 }
 227
 228 void receive_sequence_packet(ubyte *data, sequence_packet *seq)
 229 {
 230         int loc = 0;
 231
 232         seq->type = data[0];                                            loc++;
 233         memcpy(&(seq->Security), &(data[loc]), 4);      loc += 4;       loc += 3;               // +3 for pad byte
 234         seq->Security = INTEL_INT(seq->Security);
 235         receive_netplayer_info(&(data[loc]), &(seq->player));
 236 }
 237
 238 void send_netgame_packet(ubyte *server, ubyte *node, ubyte *net_address, int lite_flag)         // lite says shorter netgame packets
 239 {
 240         uint tmpi;
 241         ushort tmps; // p;
 242         int i, j;
 243         int loc = 0;
 244
 245         memset(out_buffer, 0, IPX_MAX_DATA_SIZE);
 246         memcpy(&(out_buffer[loc]), &(Netgame.type), 1); loc++;
 247         tmpi = INTEL_INT(Netgame.Security);
 248         memcpy(&(out_buffer[loc]), &tmpi, 4);           loc += 4;
 249         memcpy(&(out_buffer[loc]), Netgame.game_name, NETGAME_NAME_LEN+1); loc += (NETGAME_NAME_LEN+1);
 250         memcpy(&(out_buffer[loc]), Netgame.mission_title, MISSION_NAME_LEN+1);  loc += (MISSION_NAME_LEN+1);
 251         memcpy(&(out_buffer[loc]), Netgame.mission_name, 9);                    loc += 9;
 252         tmpi = INTEL_INT(Netgame.levelnum);
 253         memcpy(&(out_buffer[loc]), &tmpi, 4);                                                   loc += 4;
 254         memcpy(&(out_buffer[loc]), &(Netgame.gamemode), 1);                             loc++;
 255         memcpy(&(out_buffer[loc]), &(Netgame.RefusePlayers), 1);                loc++;
 256         memcpy(&(out_buffer[loc]), &(Netgame.difficulty), 1);                   loc++;
 257         memcpy(&(out_buffer[loc]), &(Netgame.game_status), 1);                  loc++;
 258         memcpy(&(out_buffer[loc]), &(Netgame.numplayers), 1);                   loc++;
 259         memcpy(&(out_buffer[loc]), &(Netgame.max_numplayers), 1);               loc++;
 260         memcpy(&(out_buffer[loc]), &(Netgame.numconnected), 1);                 loc++;
 261         memcpy(&(out_buffer[loc]), &(Netgame.game_flags), 1);                   loc++;
 262         memcpy(&(out_buffer[loc]), &(Netgame.protocol_version), 1);             loc++;
 263         memcpy(&(out_buffer[loc]), &(Netgame.version_major), 1);                loc++;
 264         memcpy(&(out_buffer[loc]), &(Netgame.version_minor), 1);                loc++;
 265         memcpy(&(out_buffer[loc]), &(Netgame.team_vector), 1);                  loc++;
 266
 267         if (lite_flag)
 268                 goto do_send;
 269
 270 // will this work -- damn bitfields -- totally bogus when trying to do this type of stuff
 271 // Watcom makes bitfields from left to right.  CW7 on the mac goes from right to left.
 272 // then they are endian swapped
 273
 274         tmps = *(ushort *)((ubyte *)(&Netgame.team_vector) + 1);                        // get the values for the first short bitfield
 275         tmps = INTEL_SHORT(tmps);
 276         memcpy(&(out_buffer[loc]), &tmps, 2);           loc += 2;
 277
 278         tmps = *(ushort *)((ubyte *)(&Netgame.team_vector) + 3);                        // get the values for the second short bitfield
 279         tmps = INTEL_SHORT(tmps);
 280         memcpy(&(out_buffer[loc]), &tmps, 2);           loc += 2;
 281
 282 #if 0           // removed since I reordered bitfields on mac
 283         p = *(ushort *)((ubyte *)(&Netgame.team_vector) + 1);                   // get the values for the first short bitfield
 284         tmps = 0;
 285         for (i = 15; i >= 0; i--) {
 286                 if ( p & (1 << i) )
 287                         tmps |= (1 << (15 - i));
 288         }
 289         tmps = INTEL_SHORT(tmps);
 290         memcpy(&(out_buffer[loc]), &tmps, 2);                                                   loc += 2;
 291         p = *(ushort *)((ubyte *)(&Netgame.team_vector) + 3);                   // get the values for the second short bitfield
 292         tmps = 0;
 293         for (i = 15; i >= 0; i--) {
 294                 if ( p & (1 << i) )
 295                         tmps |= (1 << (15 - i));
 296         }
 297         tmps = INTEL_SHORT(tmps);
 298         memcpy(&(out_buffer[loc]), &tmps, 2);                                                   loc += 2;
 299 #endif
 300
 301         memcpy(&(out_buffer[loc]), Netgame.team_name, 2*(CALLSIGN_LEN+1)); loc += 2*(CALLSIGN_LEN+1);
 302         for (i = 0; i < MAX_PLAYERS; i++) {
 303                 tmpi = INTEL_INT(Netgame.locations[i]);
 304                 memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                 // SWAP HERE!!!
 305         }
 306
 307         for (i = 0; i < MAX_PLAYERS; i++) {
 308                 for (j = 0; j < MAX_PLAYERS; j++) {
 309                         tmps = INTEL_SHORT(Netgame.kills[i][j]);
 310                         memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                 // SWAP HERE!!!
 311                 }
 312         }
 313
 314         tmps = INTEL_SHORT(Netgame.segments_checksum);
 315         memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                         // SWAP_HERE
 316         tmps = INTEL_SHORT(Netgame.team_kills[0]);
 317         memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                         // SWAP_HERE
 318         tmps = INTEL_SHORT(Netgame.team_kills[1]);
 319         memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                         // SWAP_HERE
 320         for (i = 0; i < MAX_PLAYERS; i++) {
 321                 tmps = INTEL_SHORT(Netgame.killed[i]);
 322                 memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                 // SWAP HERE!!!
 323         }
 324         for (i = 0; i < MAX_PLAYERS; i++) {
 325                 tmps = INTEL_SHORT(Netgame.player_kills[i]);
 326                 memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                 // SWAP HERE!!!
 327         }
 328
 329         tmpi = INTEL_INT(Netgame.KillGoal);
 330         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 331         tmpi = INTEL_INT(Netgame.PlayTimeAllowed);
 332         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 333         tmpi = INTEL_INT(Netgame.level_time);
 334         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 335         tmpi = INTEL_INT(Netgame.control_invul_time);
 336         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 337         tmpi = INTEL_INT(Netgame.monitor_vector);
 338         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 339         for (i = 0; i < MAX_PLAYERS; i++) {
 340                 tmpi = INTEL_INT(Netgame.player_score[i]);
 341                 memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 342         }
 343         for (i = 0; i < MAX_PLAYERS; i++) {
 344                 memcpy(&(out_buffer[loc]), &(Netgame.player_flags[i]), 1); loc++;
 345         }
 346         tmps = INTEL_SHORT(Netgame.PacketsPerSec);
 347         memcpy(&(out_buffer[loc]), &tmps, 2);                                   loc += 2;
 348         memcpy(&(out_buffer[loc]), &(Netgame.ShortPackets), 1); loc ++;
 349
 350 do_send:
 351         if (net_address != NULL)
 352                 ipx_send_packet_data( out_buffer, loc, server, node, net_address);
 353         else if ((server == NULL) && (node == NULL))
 354                 ipx_send_broadcast_packet_data( out_buffer, loc );
 355         else
 356                 ipx_send_internetwork_packet_data( out_buffer, loc, server, node);
 357 }
 358
 359 void receive_netgame_packet(ubyte *data, netgame_info *netgame, int lite_flag)
 360 {
 361         int i, j;
 362         int loc = 0;
 363         short bitfield; // new_field;
 364
 365         memcpy(&(netgame->type), &(data[loc]), 1);                                              loc++;
 366         memcpy(&(netgame->Security), &(data[loc]), 4);                                  loc += 4;
 367         netgame->Security = INTEL_INT(netgame->Security);
 368         memcpy(netgame->game_name, &(data[loc]), NETGAME_NAME_LEN+1);   loc += (NETGAME_NAME_LEN+1);
 369         memcpy(netgame->mission_title, &(data[loc]), MISSION_NAME_LEN+1); loc += (MISSION_NAME_LEN+1);
 370         memcpy(netgame->mission_name, &(data[loc]), 9);                                 loc += 9;
 371         memcpy(&(netgame->levelnum), &(data[loc]), 4);                                  loc += 4;
 372         netgame->levelnum = INTEL_INT(netgame->levelnum);
 373         memcpy(&(netgame->gamemode), &(data[loc]), 1);                                  loc++;
 374         memcpy(&(netgame->RefusePlayers), &(data[loc]), 1);                             loc++;
 375         memcpy(&(netgame->difficulty), &(data[loc]), 1);                                loc++;
 376         memcpy(&(netgame->game_status), &(data[loc]), 1);                               loc++;
 377         memcpy(&(netgame->numplayers), &(data[loc]), 1);                                loc++;
 378         memcpy(&(netgame->max_numplayers), &(data[loc]), 1);                    loc++;
 379         memcpy(&(netgame->numconnected), &(data[loc]), 1);                              loc++;
 380         memcpy(&(netgame->game_flags), &(data[loc]), 1);                                loc++;
 381         memcpy(&(netgame->protocol_version), &(data[loc]), 1);                  loc++;
 382         memcpy(&(netgame->version_major), &(data[loc]), 1);                             loc++;
 383         memcpy(&(netgame->version_minor), &(data[loc]), 1);                             loc++;
 384         memcpy(&(netgame->team_vector), &(data[loc]), 1);                               loc++;
 385
 386         if (lite_flag)
 387                 return;
 388
 389         memcpy(&bitfield, &(data[loc]), 2);     loc += 2;
 390         bitfield = INTEL_SHORT(bitfield);
 391         memcpy(((ubyte *)(&netgame->team_vector) + 1), &bitfield, 2);
 392
 393         memcpy(&bitfield, &(data[loc]), 2);     loc += 2;
 394         bitfield = INTEL_SHORT(bitfield);
 395         memcpy(((ubyte *)(&netgame->team_vector) + 3), &bitfield, 2);
 396
 397 #if 0           // not used since reordering mac bitfields
 398         memcpy(&bitfield, &(data[loc]), 2);                                                             loc += 2;
 399         new_field = 0;
 400         for (i = 15; i >= 0; i--) {
 401                 if ( bitfield & (1 << i) )
 402                         new_field |= (1 << (15 - i));
 403         }
 404         new_field = INTEL_SHORT(new_field);
 405         memcpy(((ubyte *)(&netgame->team_vector) + 1), &new_field, 2);
 406
 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) + 3), &new_field, 2);
 415 #endif
 416
 417         memcpy(netgame->team_name, &(data[loc]), 2*(CALLSIGN_LEN+1));           loc += 2*(CALLSIGN_LEN+1);
 418         for (i = 0; i < MAX_PLAYERS; i++) {
 419                 memcpy(&(netgame->locations[i]), &(data[loc]), 4);                              loc += 4;
 420                 netgame->locations[i] = INTEL_INT(netgame->locations[i]);
 421         }
 422
 423         for (i = 0; i < MAX_PLAYERS; i++) {
 424                 for (j = 0; j < MAX_PLAYERS; j++) {
 425                         memcpy(&(netgame->kills[i][j]), &(data[loc]), 2);                       loc += 2;
 426                         netgame->kills[i][j] = INTEL_SHORT(netgame->kills[i][j]);
 427                 }
 428         }
 429
 430         memcpy(&(netgame->segments_checksum), &(data[loc]), 2);                         loc += 2;
 431         netgame->segments_checksum = INTEL_SHORT(netgame->segments_checksum);
 432         memcpy(&(netgame->team_kills[0]), &(data[loc]), 2);                             loc += 2;
 433         netgame->team_kills[0] = INTEL_SHORT(netgame->team_kills[0]);
 434         memcpy(&(netgame->team_kills[1]), &(data[loc]), 2);                                     loc += 2;
 435         netgame->team_kills[1] = INTEL_SHORT(netgame->team_kills[1]);
 436         for (i = 0; i < MAX_PLAYERS; i++) {
 437                 memcpy(&(netgame->killed[i]), &(data[loc]), 2);                                 loc += 2;
 438                 netgame->killed[i] = INTEL_SHORT(netgame->killed[i]);
 439         }
 440         for (i = 0; i < MAX_PLAYERS; i++) {
 441                 memcpy(&(netgame->player_kills[i]), &(data[loc]), 2);                   loc += 2;
 442                 netgame->player_kills[i] = INTEL_SHORT(netgame->player_kills[i]);
 443         }
 444         memcpy(&(netgame->KillGoal), &(data[loc]), 4);                                          loc += 4;
 445         netgame->KillGoal = INTEL_INT(netgame->KillGoal);
 446         memcpy(&(netgame->PlayTimeAllowed), &(data[loc]), 4);                           loc += 4;
 447         netgame->PlayTimeAllowed = INTEL_INT(netgame->PlayTimeAllowed);
 448
 449         memcpy(&(netgame->level_time), &(data[loc]), 4);                                        loc += 4;
 450         netgame->level_time = INTEL_INT(netgame->level_time);
 451         memcpy(&(netgame->control_invul_time), &(data[loc]), 4);                        loc += 4;
 452         netgame->control_invul_time = INTEL_INT(netgame->control_invul_time);
 453         memcpy(&(netgame->monitor_vector), &(data[loc]), 4);                            loc += 4;
 454         netgame->monitor_vector = INTEL_INT(netgame->monitor_vector);
 455         for (i = 0; i < MAX_PLAYERS; i++) {
 456                 memcpy(&(netgame->player_score[i]), &(data[loc]), 4);                   loc += 4;
 457                 netgame->player_score[i] = INTEL_INT(netgame->player_score[i]);
 458         }
 459         for (i = 0; i < MAX_PLAYERS; i++) {
 460                 memcpy(&(netgame->player_flags[i]), &(data[loc]), 1); loc++;
 461         }
 462         memcpy(&(netgame->PacketsPerSec), &(data[loc]), 2);                                     loc += 2;
 463         netgame->PacketsPerSec = INTEL_SHORT(netgame->PacketsPerSec);
 464         memcpy(&(netgame->ShortPackets), &(data[loc]), 1);                                      loc ++;
 465
 466 }
 467
 468 void swap_object(object *obj)
 469 {
 470 // swap the short and int entries for this object
 471         obj->signature                  = INTEL_INT(obj->signature);
 472         obj->next                               = INTEL_SHORT(obj->next);
 473         obj->prev                               = INTEL_SHORT(obj->prev);
 474         obj->segnum                             = INTEL_SHORT(obj->segnum);
 475         obj->pos.x                              = INTEL_INT(obj->pos.x);
 476         obj->pos.y                              = INTEL_INT(obj->pos.y);
 477         obj->pos.z                              = INTEL_INT(obj->pos.z);
 478
 479         obj->orient.rvec.x              = INTEL_INT(obj->orient.rvec.x);
 480         obj->orient.rvec.y              = INTEL_INT(obj->orient.rvec.y);
 481         obj->orient.rvec.z              = INTEL_INT(obj->orient.rvec.z);
 482         obj->orient.fvec.x              = INTEL_INT(obj->orient.fvec.x);
 483         obj->orient.fvec.y              = INTEL_INT(obj->orient.fvec.y);
 484         obj->orient.fvec.z              = INTEL_INT(obj->orient.fvec.z);
 485         obj->orient.uvec.x              = INTEL_INT(obj->orient.uvec.x);
 486         obj->orient.uvec.y              = INTEL_INT(obj->orient.uvec.y);
 487         obj->orient.uvec.z              = INTEL_INT(obj->orient.uvec.z);
 488
 489         obj->size                               = INTEL_INT(obj->size);
 490         obj->shields                    = INTEL_INT(obj->shields);
 491
 492         obj->last_pos.x                 = INTEL_INT(obj->last_pos.x);
 493         obj->last_pos.y                 = INTEL_INT(obj->last_pos.y);
 494         obj->last_pos.z                 = INTEL_INT(obj->last_pos.z);
 495
 496         obj->lifeleft                   = INTEL_INT(obj->lifeleft);
 497
 498         switch (obj->movement_type) {
 499
 500         case MT_PHYSICS:
 501
 502                 obj->mtype.phys_info.velocity.x = INTEL_INT(obj->mtype.phys_info.velocity.x);
 503                 obj->mtype.phys_info.velocity.y = INTEL_INT(obj->mtype.phys_info.velocity.y);
 504                 obj->mtype.phys_info.velocity.z = INTEL_INT(obj->mtype.phys_info.velocity.z);
 505
 506                 obj->mtype.phys_info.thrust.x   = INTEL_INT(obj->mtype.phys_info.thrust.x);
 507                 obj->mtype.phys_info.thrust.y   = INTEL_INT(obj->mtype.phys_info.thrust.y);
 508                 obj->mtype.phys_info.thrust.z   = INTEL_INT(obj->mtype.phys_info.thrust.z);
 509
 510                 obj->mtype.phys_info.mass               = INTEL_INT(obj->mtype.phys_info.mass);
 511                 obj->mtype.phys_info.drag               = INTEL_INT(obj->mtype.phys_info.drag);
 512                 obj->mtype.phys_info.brakes             = INTEL_INT(obj->mtype.phys_info.brakes);
 513
 514                 obj->mtype.phys_info.rotvel.x   = INTEL_INT(obj->mtype.phys_info.rotvel.x);
 515                 obj->mtype.phys_info.rotvel.y   = INTEL_INT(obj->mtype.phys_info.rotvel.y);
 516                 obj->mtype.phys_info.rotvel.z   = INTEL_INT(obj->mtype.phys_info.rotvel.z);
 517
 518                 obj->mtype.phys_info.rotthrust.x = INTEL_INT(obj->mtype.phys_info.rotthrust.x);
 519                 obj->mtype.phys_info.rotthrust.y = INTEL_INT(obj->mtype.phys_info.rotthrust.y);
 520                 obj->mtype.phys_info.rotthrust.z = INTEL_INT(obj->mtype.phys_info.rotthrust.z);
 521
 522                 obj->mtype.phys_info.turnroll   = INTEL_INT(obj->mtype.phys_info.turnroll);
 523                 obj->mtype.phys_info.flags              = INTEL_SHORT(obj->mtype.phys_info.flags);
 524
 525                 break;
 526
 527         case MT_SPINNING:
 528
 529                 obj->mtype.spin_rate.x = INTEL_INT(obj->mtype.spin_rate.x);
 530                 obj->mtype.spin_rate.y = INTEL_INT(obj->mtype.spin_rate.y);
 531                 obj->mtype.spin_rate.z = INTEL_INT(obj->mtype.spin_rate.z);
 532                 break;
 533         }
 534
 535         switch (obj->control_type) {
 536
 537         case CT_WEAPON:
 538                 obj->ctype.laser_info.parent_type               = INTEL_SHORT(obj->ctype.laser_info.parent_type);
 539                 obj->ctype.laser_info.parent_num                = INTEL_SHORT(obj->ctype.laser_info.parent_num);
 540                 obj->ctype.laser_info.parent_signature  = INTEL_INT(obj->ctype.laser_info.parent_signature);
 541                 obj->ctype.laser_info.creation_time             = INTEL_INT(obj->ctype.laser_info.creation_time);
 542                 obj->ctype.laser_info.last_hitobj               = INTEL_SHORT(obj->ctype.laser_info.last_hitobj);
 543                 obj->ctype.laser_info.track_goal                = INTEL_SHORT(obj->ctype.laser_info.track_goal);
 544                 obj->ctype.laser_info.multiplier                = INTEL_INT(obj->ctype.laser_info.multiplier);
 545                 break;
 546
 547         case CT_EXPLOSION:
 548                 obj->ctype.expl_info.spawn_time         = INTEL_INT(obj->ctype.expl_info.spawn_time);
 549                 obj->ctype.expl_info.delete_time        = INTEL_INT(obj->ctype.expl_info.delete_time);
 550                 obj->ctype.expl_info.delete_objnum      = INTEL_SHORT(obj->ctype.expl_info.delete_objnum);
 551                 obj->ctype.expl_info.attach_parent      = INTEL_SHORT(obj->ctype.expl_info.attach_parent);
 552                 obj->ctype.expl_info.prev_attach        = INTEL_SHORT(obj->ctype.expl_info.prev_attach);
 553                 obj->ctype.expl_info.next_attach        = INTEL_SHORT(obj->ctype.expl_info.next_attach);
 554                 break;
 555
 556         case CT_AI:
 557                 obj->ctype.ai_info.hide_segment                 = INTEL_SHORT(obj->ctype.ai_info.hide_segment);
 558                 obj->ctype.ai_info.hide_index                   = INTEL_SHORT(obj->ctype.ai_info.hide_index);
 559                 obj->ctype.ai_info.path_length                  = INTEL_SHORT(obj->ctype.ai_info.path_length);
 560                 obj->ctype.ai_info.danger_laser_num             = INTEL_SHORT(obj->ctype.ai_info.danger_laser_num);
 561                 obj->ctype.ai_info.danger_laser_signature = INTEL_INT(obj->ctype.ai_info.danger_laser_signature);
 562                 obj->ctype.ai_info.dying_start_time     = INTEL_INT(obj->ctype.ai_info.dying_start_time);
 563                 break;
 564
 565         case CT_LIGHT:
 566                 obj->ctype.light_info.intensity = INTEL_INT(obj->ctype.light_info.intensity);
 567                 break;
 568
 569         case CT_POWERUP:
 570                 obj->ctype.powerup_info.count = INTEL_INT(obj->ctype.powerup_info.count);
 571                 obj->ctype.powerup_info.creation_time = INTEL_INT(obj->ctype.powerup_info.creation_time);
 572                 //Below commented out 5/2/96 by Matt.  I asked Allender why it was
 573                 //here, and he didn't know, and it looks like it doesn't belong.
 574                 //if (obj->id == POW_VULCAN_WEAPON)
 575                 //      obj->ctype.powerup_info.count = VULCAN_WEAPON_AMMO_AMOUNT;
 576                 break;
 577
 578         }
 579
 580         switch (obj->render_type) {
 581
 582         case RT_MORPH:
 583         case RT_POLYOBJ: {
 584                 int i;
 585
 586                 obj->rtype.pobj_info.model_num          = INTEL_INT(obj->rtype.pobj_info.model_num);
 587
 588                 for (i=0;i<MAX_SUBMODELS;i++) {
 589                         obj->rtype.pobj_info.anim_angles[i].p = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].p);
 590                         obj->rtype.pobj_info.anim_angles[i].b = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].b);
 591                         obj->rtype.pobj_info.anim_angles[i].h = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].h);
 592                 }
 593
 594                 obj->rtype.pobj_info.subobj_flags       = INTEL_INT(obj->rtype.pobj_info.subobj_flags);
 595                 obj->rtype.pobj_info.tmap_override      = INTEL_INT(obj->rtype.pobj_info.tmap_override);
 596                 obj->rtype.pobj_info.alt_textures       = INTEL_INT(obj->rtype.pobj_info.alt_textures);
 597                 break;
 598         }
 599
 600         case RT_WEAPON_VCLIP:
 601         case RT_HOSTAGE:
 602         case RT_POWERUP:
 603         case RT_FIREBALL:
 604                 obj->rtype.vclip_info.vclip_num = INTEL_INT(obj->rtype.vclip_info.vclip_num);
 605                 obj->rtype.vclip_info.frametime = INTEL_INT(obj->rtype.vclip_info.frametime);
 606                 break;
 607
 608         case RT_LASER:
 609                 break;
 610
 611         }
 612 //  END OF SWAPPING OBJECT STRUCTURE
 613
 614 }
 615
 616 #else
 617
 618
 619 // Calculates the checksum of a block of memory.
 620 ushort netmisc_calc_checksum( void * vptr, int len )
 621 {
 622         ubyte * ptr = (ubyte *)vptr;
 623         unsigned int sum1,sum2;
 624
 625         sum1 = sum2 = 0;
 626
 627         while(len--)    {
 628                 sum1 += *ptr++;
 629                 if (sum1 >= 255 ) sum1 -= 255;
 630                 sum2 += sum1;
 631         }
 632         sum2 %= 255;
 633
 634         return ((sum1<<8)+ sum2);
 635 }
 636
 637 #endif
 638 //--unused-- //Finds the difference between block1 and block2.  Fills in diff_buffer and
 639 //--unused-- //returns the size of diff_buffer.
 640 //--unused-- int netmisc_find_diff( void *block1, void *block2, int block_size, void *diff_buffer )
 641 //--unused-- {
 642 //--unused--    int mode;
 643 //--unused--    ushort *c1, *c2, *diff_start, *c3;
 644 //--unused--    int i, j, size, diff, n , same;
 645 //--unused--
 646 //--unused--    size=(block_size+1)/sizeof(ushort);
 647 //--unused--    c1 = (ushort *)block1;
 648 //--unused--    c2 = (ushort *)block2;
 649 //--unused--    c3 = (ushort *)diff_buffer;
 650 //--unused--
 651 //--unused--    mode = same = diff = n = 0;
 652 //--unused--
 653 //--unused--    //mprintf( 0, "=================================\n" );
 654 //--unused--
 655 //--unused--    for (i=0; i<size; i++, c1++, c2++ )     {
 656 //--unused--            if (*c1 != *c2 ) {
 657 //--unused--                    if (mode==0)    {
 658 //--unused--                            mode = 1;
 659 //--unused--                            //mprintf( 0, "%ds ", same );
 660 //--unused--                            c3[n++] = same;
 661 //--unused--                            same=0; diff=0;
 662 //--unused--                            diff_start = c2;
 663 //--unused--                    }
 664 //--unused--                    *c1 = *c2;
 665 //--unused--                    diff++;
 666 //--unused--                    if (diff==65535) {
 667 //--unused--                            mode = 0;
 668 //--unused--                            // send how many diff ones.
 669 //--unused--                            //mprintf( 0, "%dd ", diff );
 670 //--unused--                            c3[n++]=diff;
 671 //--unused--                            // send all the diff ones.
 672 //--unused--                            for (j=0; j<diff; j++ )
 673 //--unused--                                    c3[n++] = diff_start[j];
 674 //--unused--                            same=0; diff=0;
 675 //--unused--                            diff_start = c2;
 676 //--unused--                    }
 677 //--unused--            } else {
 678 //--unused--                    if (mode==1)    {
 679 //--unused--                            mode=0;
 680 //--unused--                            // send how many diff ones.
 681 //--unused--                            //mprintf( 0, "%dd ", diff );
 682 //--unused--                            c3[n++]=diff;
 683 //--unused--                            // send all the diff ones.
 684 //--unused--                            for (j=0; j<diff; j++ )
 685 //--unused--                                    c3[n++] = diff_start[j];
 686 //--unused--                            same=0; diff=0;
 687 //--unused--                            diff_start = c2;
 688 //--unused--                    }
 689 //--unused--                    same++;
 690 //--unused--                    if (same==65535)        {
 691 //--unused--                            mode=1;
 692 //--unused--                            // send how many the same
 693 //--unused--                            //mprintf( 0, "%ds ", same );
 694 //--unused--                            c3[n++] = same;
 695 //--unused--                            same=0; diff=0;
 696 //--unused--                            diff_start = c2;
 697 //--unused--                    }
 698 //--unused--            }
 699 //--unused--
 700 //--unused--    }
 701 //--unused--    if (mode==0)    {
 702 //--unused--            // send how many the same
 703 //--unused--            //mprintf( 0, "%ds ", same );
 704 //--unused--            c3[n++] = same;
 705 //--unused--    } else {
 706 //--unused--            // send how many diff ones.
 707 //--unused--            //mprintf( 0, "%dd ", diff );
 708 //--unused--            c3[n++]=diff;
 709 //--unused--            // send all the diff ones.
 710 //--unused--            for (j=0; j<diff; j++ )
 711 //--unused--                    c3[n++] = diff_start[j];
 712 //--unused--    }
 713 //--unused--
 714 //--unused--    //mprintf( 0, "=================================\n" );
 715 //--unused--
 716 //--unused--    return n*2;
 717 //--unused-- }
 718
 719 //--unused-- //Applies diff_buffer to block1 to create a new block1.  Returns the final
 720 //--unused-- //size of block1.
 721 //--unused-- int netmisc_apply_diff(void *block1, void *diff_buffer, int diff_size )
 722 //--unused-- {
 723 //--unused--    unsigned int i, j, n, size;
 724 //--unused--    ushort *c1, *c2;
 725 //--unused--
 726 //--unused--    //mprintf( 0, "=================================\n" );
 727 //--unused--    c1 = (ushort *)diff_buffer;
 728 //--unused--    c2 = (ushort *)block1;
 729 //--unused--
 730 //--unused--    size = diff_size/2;
 731 //--unused--
 732 //--unused--    i=j=0;
 733 //--unused--    while (1)       {
 734 //--unused--            j += c1[i];                     // Same
 735 //--unused--            //mprintf( 0, "%ds ", c1[i] );
 736 //--unused--            i++;
 737 //--unused--            if ( i>=size) break;
 738 //--unused--            n = c1[i];                      // ndiff
 739 //--unused--            //mprintf( 0, "%dd ", c1[i] );
 740 //--unused--            i++;
 741 //--unused--            if (n>0)        {
 742 //--unused--                    //Assert( n* < 256 );
 743 //--unused--                    memcpy( &c2[j], &c1[i], n*2 );
 744 //--unused--                    i += n;
 745 //--unused--                    j += n;
 746 //--unused--            }
 747 //--unused--            if ( i>=size) break;
 748 //--unused--    }
 749 //--unused--    //mprintf( 0, "=================================\n" );
 750 //--unused--
 751 //--unused--    return j*2;
 752 //--unused-- }
 753