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 1.8 2003-10-03 03:19:03 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 // following are routine for macintosh only that will swap the elements of
 109 // structures send through the networking code.  The structures and
 110 // this code must be kept in total sync
 111
 112 #include "ipx.h"
 113 #include "multi.h"
 114 #ifdef NETWORK
 115 #include "network.h"
 116 #endif
 117 #include "object.h"
 118 #include "powerup.h"
 119 #include "error.h"
 120
 121 byte out_buffer[IPX_MAX_DATA_SIZE];             // used for tmp netgame packets as well as sending object data
 122
 123 void receive_netplayer_info(ubyte *data, netplayer_info *info)
 124 {
 125         int loc = 0;
 126
 127         memcpy(info->callsign, &(data[loc]), CALLSIGN_LEN+1);       loc += CALLSIGN_LEN+1;
 128         memcpy(&(info->network.ipx.server), &(data[loc]), 4);       loc += 4;
 129         memcpy(&(info->network.ipx.node), &(data[loc]), 6);         loc += 6;
 130         info->version_major = data[loc];                            loc++;
 131         info->version_minor = data[loc];                            loc++;
 132         memcpy(&(info->computer_type), &(data[loc]), 1);            loc++;      // memcpy to avoid compile time warning about enum
 133         info->connected = data[loc];                                loc++;
 134         memcpy(&(info->socket), &(data[loc]), 2);                   loc += 2;
 135         memcpy (&(info->rank),&(data[loc]),1);                      loc++;
 136 //MWA  don't think we need to swap this because we need it in high order    info->socket = INTEL_SHORT(info->socket);
 137 }
 138
 139 void send_netplayers_packet(ubyte *server, ubyte *node)
 140 {
 141         int i, tmpi;
 142         int loc = 0;
 143         short tmps;
 144
 145         memset(out_buffer, 0, sizeof(out_buffer));
 146         out_buffer[0] = NetPlayers.type;                                                loc++;
 147         tmpi = INTEL_INT(NetPlayers.Security);
 148         memcpy(&(out_buffer[loc]), &tmpi, 4);                                   loc += 4;
 149         for (i = 0; i < MAX_PLAYERS+4; i++) {
 150                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].callsign, CALLSIGN_LEN+1);     loc += CALLSIGN_LEN+1;
 151                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].network.ipx.server, 4);                                loc += 4;
 152                 memcpy(&(out_buffer[loc]), NetPlayers.players[i].network.ipx.node, 6);                                  loc += 6;
 153                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].version_major), 1);          loc++;
 154                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].version_minor), 1);          loc++;
 155                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].computer_type), 1);          loc++;
 156                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].connected), 1);                      loc++;
 157                 tmps = INTEL_SHORT(NetPlayers.players[i].socket);
 158                 memcpy(&(out_buffer[loc]), &tmps, 2);                                                                           loc += 2;
 159                 memcpy(&(out_buffer[loc]), &(NetPlayers.players[i].rank), 1);                   loc++;
 160         }
 161
 162         if ((server == NULL) && (node == NULL))
 163                 ipx_send_broadcast_packet_data( out_buffer, loc );
 164         else
 165                 ipx_send_internetwork_packet_data( out_buffer, loc, server, node);
 166
 167 }
 168
 169 void receive_netplayers_packet(ubyte *data, AllNetPlayers_info *pinfo)
 170 {
 171         int i, loc = 0;
 172
 173         pinfo->type = data[loc];                                                        loc++;
 174         memcpy(&(pinfo->Security), &(data[loc]), 4);            loc += 4;
 175         pinfo->Security = INTEL_INT(pinfo->Security);
 176         for (i = 0; i < MAX_PLAYERS+4; i++) {
 177                 receive_netplayer_info(&(data[loc]), &(pinfo->players[i]));
 178                 loc += 26;                      // sizeof(netplayer_info) on the PC
 179         }
 180 }
 181
 182 void send_sequence_packet(sequence_packet seq, ubyte *server, ubyte *node, ubyte *net_address)
 183 {
 184         short tmps;
 185         int loc, tmpi;
 186
 187         loc = 0;
 188         memset(out_buffer, 0, sizeof(out_buffer));
 189         out_buffer[0] = seq.type;                                                                               loc++;
 190         tmpi = INTEL_INT(seq.Security);
 191         memcpy(&(out_buffer[loc]), &tmpi, 4);                                                   loc += 4;               loc += 3;
 192         memcpy(&(out_buffer[loc]), seq.player.callsign, CALLSIGN_LEN+1);loc += CALLSIGN_LEN+1;
 193         memcpy(&(out_buffer[loc]), seq.player.network.ipx.server, 4);                           loc += 4;
 194         memcpy(&(out_buffer[loc]), seq.player.network.ipx.node, 6);                                     loc += 6;
 195         out_buffer[loc] = seq.player.version_major;                                             loc++;
 196         out_buffer[loc] = seq.player.version_minor;                                             loc++;
 197         out_buffer[loc] = seq.player.computer_type;                                             loc++;
 198         out_buffer[loc] = seq.player.connected;                                                 loc++;
 199         tmps = INTEL_SHORT(seq.player.socket);
 200         memcpy(&(out_buffer[loc]), &tmps, 2);                                                   loc += 2;
 201    out_buffer[loc]=seq.player.rank;                                                                     loc++;          // for pad byte
 202         if (net_address != NULL)
 203                 ipx_send_packet_data( out_buffer, loc, server, node, net_address);
 204         else if ((server == NULL) && (node == NULL))
 205                 ipx_send_broadcast_packet_data( out_buffer, loc );
 206         else
 207                 ipx_send_internetwork_packet_data( out_buffer, loc, server, node);
 208 }
 209
 210 void receive_sequence_packet(ubyte *data, sequence_packet *seq)
 211 {
 212         int loc = 0;
 213
 214         seq->type = data[0];                                            loc++;
 215         memcpy(&(seq->Security), &(data[loc]), 4);      loc += 4;       loc += 3;               // +3 for pad byte
 216         seq->Security = INTEL_INT(seq->Security);
 217         receive_netplayer_info(&(data[loc]), &(seq->player));
 218 }
 219
 220 void send_netgame_packet(ubyte *server, ubyte *node, ubyte *net_address, int lite_flag)         // lite says shorter netgame packets
 221 {
 222         uint tmpi;
 223         ushort tmps; // p;
 224         int i, j;
 225         int loc = 0;
 226
 227         memset(out_buffer, 0, IPX_MAX_DATA_SIZE);
 228         memcpy(&(out_buffer[loc]), &(Netgame.type), 1); loc++;
 229         tmpi = INTEL_INT(Netgame.Security);
 230         memcpy(&(out_buffer[loc]), &tmpi, 4);           loc += 4;
 231         memcpy(&(out_buffer[loc]), Netgame.game_name, NETGAME_NAME_LEN+1); loc += (NETGAME_NAME_LEN+1);
 232         memcpy(&(out_buffer[loc]), Netgame.mission_title, MISSION_NAME_LEN+1);  loc += (MISSION_NAME_LEN+1);
 233         memcpy(&(out_buffer[loc]), Netgame.mission_name, 9);                    loc += 9;
 234         tmpi = INTEL_INT(Netgame.levelnum);
 235         memcpy(&(out_buffer[loc]), &tmpi, 4);                                                   loc += 4;
 236         memcpy(&(out_buffer[loc]), &(Netgame.gamemode), 1);                             loc++;
 237         memcpy(&(out_buffer[loc]), &(Netgame.RefusePlayers), 1);                loc++;
 238         memcpy(&(out_buffer[loc]), &(Netgame.difficulty), 1);                   loc++;
 239         memcpy(&(out_buffer[loc]), &(Netgame.game_status), 1);                  loc++;
 240         memcpy(&(out_buffer[loc]), &(Netgame.numplayers), 1);                   loc++;
 241         memcpy(&(out_buffer[loc]), &(Netgame.max_numplayers), 1);               loc++;
 242         memcpy(&(out_buffer[loc]), &(Netgame.numconnected), 1);                 loc++;
 243         memcpy(&(out_buffer[loc]), &(Netgame.game_flags), 1);                   loc++;
 244         memcpy(&(out_buffer[loc]), &(Netgame.protocol_version), 1);             loc++;
 245         memcpy(&(out_buffer[loc]), &(Netgame.version_major), 1);                loc++;
 246         memcpy(&(out_buffer[loc]), &(Netgame.version_minor), 1);                loc++;
 247         memcpy(&(out_buffer[loc]), &(Netgame.team_vector), 1);                  loc++;
 248
 249         if (lite_flag)
 250                 goto do_send;
 251
 252 // will this work -- damn bitfields -- totally bogus when trying to do this type of stuff
 253 // Watcom makes bitfields from left to right.  CW7 on the mac goes from right to left.
 254 // then they are endian swapped
 255
 256         tmps = *(ushort *)((ubyte *)(&Netgame.team_vector) + 1);                        // get the values for the first short bitfield
 257         tmps = INTEL_SHORT(tmps);
 258         memcpy(&(out_buffer[loc]), &tmps, 2);           loc += 2;
 259
 260         tmps = *(ushort *)((ubyte *)(&Netgame.team_vector) + 3);                        // get the values for the second short bitfield
 261         tmps = INTEL_SHORT(tmps);
 262         memcpy(&(out_buffer[loc]), &tmps, 2);           loc += 2;
 263
 264 #if 0           // removed since I reordered bitfields on mac
 265         p = *(ushort *)((ubyte *)(&Netgame.team_vector) + 1);                   // get the values for the first short bitfield
 266         tmps = 0;
 267         for (i = 15; i >= 0; i--) {
 268                 if ( p & (1 << i) )
 269                         tmps |= (1 << (15 - i));
 270         }
 271         tmps = INTEL_SHORT(tmps);
 272         memcpy(&(out_buffer[loc]), &tmps, 2);                                                   loc += 2;
 273         p = *(ushort *)((ubyte *)(&Netgame.team_vector) + 3);                   // get the values for the second short bitfield
 274         tmps = 0;
 275         for (i = 15; i >= 0; i--) {
 276                 if ( p & (1 << i) )
 277                         tmps |= (1 << (15 - i));
 278         }
 279         tmps = INTEL_SHORT(tmps);
 280         memcpy(&(out_buffer[loc]), &tmps, 2);                                                   loc += 2;
 281 #endif
 282
 283         memcpy(&(out_buffer[loc]), Netgame.team_name, 2*(CALLSIGN_LEN+1)); loc += 2*(CALLSIGN_LEN+1);
 284         for (i = 0; i < MAX_PLAYERS; i++) {
 285                 tmpi = INTEL_INT(Netgame.locations[i]);
 286                 memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                 // SWAP HERE!!!
 287         }
 288
 289         for (i = 0; i < MAX_PLAYERS; i++) {
 290                 for (j = 0; j < MAX_PLAYERS; j++) {
 291                         tmps = INTEL_SHORT(Netgame.kills[i][j]);
 292                         memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                 // SWAP HERE!!!
 293                 }
 294         }
 295
 296         tmps = INTEL_SHORT(Netgame.segments_checksum);
 297         memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                         // SWAP_HERE
 298         tmps = INTEL_SHORT(Netgame.team_kills[0]);
 299         memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                         // SWAP_HERE
 300         tmps = INTEL_SHORT(Netgame.team_kills[1]);
 301         memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                         // SWAP_HERE
 302         for (i = 0; i < MAX_PLAYERS; i++) {
 303                 tmps = INTEL_SHORT(Netgame.killed[i]);
 304                 memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                 // SWAP HERE!!!
 305         }
 306         for (i = 0; i < MAX_PLAYERS; i++) {
 307                 tmps = INTEL_SHORT(Netgame.player_kills[i]);
 308                 memcpy(&(out_buffer[loc]), &tmps, 2); loc += 2;                 // SWAP HERE!!!
 309         }
 310
 311         tmpi = INTEL_INT(Netgame.KillGoal);
 312         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 313         tmpi = INTEL_INT(Netgame.PlayTimeAllowed);
 314         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 315         tmpi = INTEL_INT(Netgame.level_time);
 316         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 317         tmpi = INTEL_INT(Netgame.control_invul_time);
 318         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 319         tmpi = INTEL_INT(Netgame.monitor_vector);
 320         memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 321         for (i = 0; i < MAX_PLAYERS; i++) {
 322                 tmpi = INTEL_INT(Netgame.player_score[i]);
 323                 memcpy(&(out_buffer[loc]), &tmpi, 4); loc += 4;                         // SWAP_HERE
 324         }
 325         for (i = 0; i < MAX_PLAYERS; i++) {
 326                 memcpy(&(out_buffer[loc]), &(Netgame.player_flags[i]), 1); loc++;
 327         }
 328         tmps = INTEL_SHORT(Netgame.PacketsPerSec);
 329         memcpy(&(out_buffer[loc]), &tmps, 2);                                   loc += 2;
 330         memcpy(&(out_buffer[loc]), &(Netgame.ShortPackets), 1); loc ++;
 331
 332 do_send:
 333         if (net_address != NULL)
 334                 ipx_send_packet_data( out_buffer, loc, server, node, net_address);
 335         else if ((server == NULL) && (node == NULL))
 336                 ipx_send_broadcast_packet_data( out_buffer, loc );
 337         else
 338                 ipx_send_internetwork_packet_data( out_buffer, loc, server, node);
 339 }
 340
 341 void receive_netgame_packet(ubyte *data, netgame_info *netgame, int lite_flag)
 342 {
 343         int i, j;
 344         int loc = 0;
 345         short bitfield; // new_field;
 346
 347         memcpy(&(netgame->type), &(data[loc]), 1);                                              loc++;
 348         memcpy(&(netgame->Security), &(data[loc]), 4);                                  loc += 4;
 349         netgame->Security = INTEL_INT(netgame->Security);
 350         memcpy(netgame->game_name, &(data[loc]), NETGAME_NAME_LEN+1);   loc += (NETGAME_NAME_LEN+1);
 351         memcpy(netgame->mission_title, &(data[loc]), MISSION_NAME_LEN+1); loc += (MISSION_NAME_LEN+1);
 352         memcpy(netgame->mission_name, &(data[loc]), 9);                                 loc += 9;
 353         memcpy(&(netgame->levelnum), &(data[loc]), 4);                                  loc += 4;
 354         netgame->levelnum = INTEL_INT(netgame->levelnum);
 355         memcpy(&(netgame->gamemode), &(data[loc]), 1);                                  loc++;
 356         memcpy(&(netgame->RefusePlayers), &(data[loc]), 1);                             loc++;
 357         memcpy(&(netgame->difficulty), &(data[loc]), 1);                                loc++;
 358         memcpy(&(netgame->game_status), &(data[loc]), 1);                               loc++;
 359         memcpy(&(netgame->numplayers), &(data[loc]), 1);                                loc++;
 360         memcpy(&(netgame->max_numplayers), &(data[loc]), 1);                    loc++;
 361         memcpy(&(netgame->numconnected), &(data[loc]), 1);                              loc++;
 362         memcpy(&(netgame->game_flags), &(data[loc]), 1);                                loc++;
 363         memcpy(&(netgame->protocol_version), &(data[loc]), 1);                  loc++;
 364         memcpy(&(netgame->version_major), &(data[loc]), 1);                             loc++;
 365         memcpy(&(netgame->version_minor), &(data[loc]), 1);                             loc++;
 366         memcpy(&(netgame->team_vector), &(data[loc]), 1);                               loc++;
 367
 368         if (lite_flag)
 369                 return;
 370
 371         memcpy(&bitfield, &(data[loc]), 2);     loc += 2;
 372         bitfield = INTEL_SHORT(bitfield);
 373         memcpy(((ubyte *)(&netgame->team_vector) + 1), &bitfield, 2);
 374
 375         memcpy(&bitfield, &(data[loc]), 2);     loc += 2;
 376         bitfield = INTEL_SHORT(bitfield);
 377         memcpy(((ubyte *)(&netgame->team_vector) + 3), &bitfield, 2);
 378
 379 #if 0           // not used since reordering mac bitfields
 380         memcpy(&bitfield, &(data[loc]), 2);                                                             loc += 2;
 381         new_field = 0;
 382         for (i = 15; i >= 0; i--) {
 383                 if ( bitfield & (1 << i) )
 384                         new_field |= (1 << (15 - i));
 385         }
 386         new_field = INTEL_SHORT(new_field);
 387         memcpy(((ubyte *)(&netgame->team_vector) + 1), &new_field, 2);
 388
 389         memcpy(&bitfield, &(data[loc]), 2);                                                             loc += 2;
 390         new_field = 0;
 391         for (i = 15; i >= 0; i--) {
 392                 if ( bitfield & (1 << i) )
 393                         new_field |= (1 << (15 - i));
 394         }
 395         new_field = INTEL_SHORT(new_field);
 396         memcpy(((ubyte *)(&netgame->team_vector) + 3), &new_field, 2);
 397 #endif
 398
 399         memcpy(netgame->team_name, &(data[loc]), 2*(CALLSIGN_LEN+1));           loc += 2*(CALLSIGN_LEN+1);
 400         for (i = 0; i < MAX_PLAYERS; i++) {
 401                 memcpy(&(netgame->locations[i]), &(data[loc]), 4);                              loc += 4;
 402                 netgame->locations[i] = INTEL_INT(netgame->locations[i]);
 403         }
 404
 405         for (i = 0; i < MAX_PLAYERS; i++) {
 406                 for (j = 0; j < MAX_PLAYERS; j++) {
 407                         memcpy(&(netgame->kills[i][j]), &(data[loc]), 2);                       loc += 2;
 408                         netgame->kills[i][j] = INTEL_SHORT(netgame->kills[i][j]);
 409                 }
 410         }
 411
 412         memcpy(&(netgame->segments_checksum), &(data[loc]), 2);                         loc += 2;
 413         netgame->segments_checksum = INTEL_SHORT(netgame->segments_checksum);
 414         memcpy(&(netgame->team_kills[0]), &(data[loc]), 2);                             loc += 2;
 415         netgame->team_kills[0] = INTEL_SHORT(netgame->team_kills[0]);
 416         memcpy(&(netgame->team_kills[1]), &(data[loc]), 2);                                     loc += 2;
 417         netgame->team_kills[1] = INTEL_SHORT(netgame->team_kills[1]);
 418         for (i = 0; i < MAX_PLAYERS; i++) {
 419                 memcpy(&(netgame->killed[i]), &(data[loc]), 2);                                 loc += 2;
 420                 netgame->killed[i] = INTEL_SHORT(netgame->killed[i]);
 421         }
 422         for (i = 0; i < MAX_PLAYERS; i++) {
 423                 memcpy(&(netgame->player_kills[i]), &(data[loc]), 2);                   loc += 2;
 424                 netgame->player_kills[i] = INTEL_SHORT(netgame->player_kills[i]);
 425         }
 426         memcpy(&(netgame->KillGoal), &(data[loc]), 4);                                          loc += 4;
 427         netgame->KillGoal = INTEL_INT(netgame->KillGoal);
 428         memcpy(&(netgame->PlayTimeAllowed), &(data[loc]), 4);                           loc += 4;
 429         netgame->PlayTimeAllowed = INTEL_INT(netgame->PlayTimeAllowed);
 430
 431         memcpy(&(netgame->level_time), &(data[loc]), 4);                                        loc += 4;
 432         netgame->level_time = INTEL_INT(netgame->level_time);
 433         memcpy(&(netgame->control_invul_time), &(data[loc]), 4);                        loc += 4;
 434         netgame->control_invul_time = INTEL_INT(netgame->control_invul_time);
 435         memcpy(&(netgame->monitor_vector), &(data[loc]), 4);                            loc += 4;
 436         netgame->monitor_vector = INTEL_INT(netgame->monitor_vector);
 437         for (i = 0; i < MAX_PLAYERS; i++) {
 438                 memcpy(&(netgame->player_score[i]), &(data[loc]), 4);                   loc += 4;
 439                 netgame->player_score[i] = INTEL_INT(netgame->player_score[i]);
 440         }
 441         for (i = 0; i < MAX_PLAYERS; i++) {
 442                 memcpy(&(netgame->player_flags[i]), &(data[loc]), 1); loc++;
 443         }
 444         memcpy(&(netgame->PacketsPerSec), &(data[loc]), 2);                                     loc += 2;
 445         netgame->PacketsPerSec = INTEL_SHORT(netgame->PacketsPerSec);
 446         memcpy(&(netgame->ShortPackets), &(data[loc]), 1);                                      loc ++;
 447
 448 }
 449
 450 void swap_object(object *obj)
 451 {
 452 // swap the short and int entries for this object
 453         obj->signature                  = INTEL_INT(obj->signature);
 454         obj->next                               = INTEL_SHORT(obj->next);
 455         obj->prev                               = INTEL_SHORT(obj->prev);
 456         obj->segnum                             = INTEL_SHORT(obj->segnum);
 457         obj->pos.x                              = INTEL_INT(obj->pos.x);
 458         obj->pos.y                              = INTEL_INT(obj->pos.y);
 459         obj->pos.z                              = INTEL_INT(obj->pos.z);
 460
 461         obj->orient.rvec.x              = INTEL_INT(obj->orient.rvec.x);
 462         obj->orient.rvec.y              = INTEL_INT(obj->orient.rvec.y);
 463         obj->orient.rvec.z              = INTEL_INT(obj->orient.rvec.z);
 464         obj->orient.fvec.x              = INTEL_INT(obj->orient.fvec.x);
 465         obj->orient.fvec.y              = INTEL_INT(obj->orient.fvec.y);
 466         obj->orient.fvec.z              = INTEL_INT(obj->orient.fvec.z);
 467         obj->orient.uvec.x              = INTEL_INT(obj->orient.uvec.x);
 468         obj->orient.uvec.y              = INTEL_INT(obj->orient.uvec.y);
 469         obj->orient.uvec.z              = INTEL_INT(obj->orient.uvec.z);
 470
 471         obj->size                               = INTEL_INT(obj->size);
 472         obj->shields                    = INTEL_INT(obj->shields);
 473
 474         obj->last_pos.x                 = INTEL_INT(obj->last_pos.x);
 475         obj->last_pos.y                 = INTEL_INT(obj->last_pos.y);
 476         obj->last_pos.z                 = INTEL_INT(obj->last_pos.z);
 477
 478         obj->lifeleft                   = INTEL_INT(obj->lifeleft);
 479
 480         switch (obj->movement_type) {
 481
 482         case MT_PHYSICS:
 483
 484                 obj->mtype.phys_info.velocity.x = INTEL_INT(obj->mtype.phys_info.velocity.x);
 485                 obj->mtype.phys_info.velocity.y = INTEL_INT(obj->mtype.phys_info.velocity.y);
 486                 obj->mtype.phys_info.velocity.z = INTEL_INT(obj->mtype.phys_info.velocity.z);
 487
 488                 obj->mtype.phys_info.thrust.x   = INTEL_INT(obj->mtype.phys_info.thrust.x);
 489                 obj->mtype.phys_info.thrust.y   = INTEL_INT(obj->mtype.phys_info.thrust.y);
 490                 obj->mtype.phys_info.thrust.z   = INTEL_INT(obj->mtype.phys_info.thrust.z);
 491
 492                 obj->mtype.phys_info.mass               = INTEL_INT(obj->mtype.phys_info.mass);
 493                 obj->mtype.phys_info.drag               = INTEL_INT(obj->mtype.phys_info.drag);
 494                 obj->mtype.phys_info.brakes             = INTEL_INT(obj->mtype.phys_info.brakes);
 495
 496                 obj->mtype.phys_info.rotvel.x   = INTEL_INT(obj->mtype.phys_info.rotvel.x);
 497                 obj->mtype.phys_info.rotvel.y   = INTEL_INT(obj->mtype.phys_info.rotvel.y);
 498                 obj->mtype.phys_info.rotvel.z   = INTEL_INT(obj->mtype.phys_info.rotvel.z);
 499
 500                 obj->mtype.phys_info.rotthrust.x = INTEL_INT(obj->mtype.phys_info.rotthrust.x);
 501                 obj->mtype.phys_info.rotthrust.y = INTEL_INT(obj->mtype.phys_info.rotthrust.y);
 502                 obj->mtype.phys_info.rotthrust.z = INTEL_INT(obj->mtype.phys_info.rotthrust.z);
 503
 504                 obj->mtype.phys_info.turnroll   = INTEL_INT(obj->mtype.phys_info.turnroll);
 505                 obj->mtype.phys_info.flags              = INTEL_SHORT(obj->mtype.phys_info.flags);
 506
 507                 break;
 508
 509         case MT_SPINNING:
 510
 511                 obj->mtype.spin_rate.x = INTEL_INT(obj->mtype.spin_rate.x);
 512                 obj->mtype.spin_rate.y = INTEL_INT(obj->mtype.spin_rate.y);
 513                 obj->mtype.spin_rate.z = INTEL_INT(obj->mtype.spin_rate.z);
 514                 break;
 515         }
 516
 517         switch (obj->control_type) {
 518
 519         case CT_WEAPON:
 520                 obj->ctype.laser_info.parent_type               = INTEL_SHORT(obj->ctype.laser_info.parent_type);
 521                 obj->ctype.laser_info.parent_num                = INTEL_SHORT(obj->ctype.laser_info.parent_num);
 522                 obj->ctype.laser_info.parent_signature  = INTEL_INT(obj->ctype.laser_info.parent_signature);
 523                 obj->ctype.laser_info.creation_time             = INTEL_INT(obj->ctype.laser_info.creation_time);
 524                 obj->ctype.laser_info.last_hitobj               = INTEL_SHORT(obj->ctype.laser_info.last_hitobj);
 525                 obj->ctype.laser_info.track_goal                = INTEL_SHORT(obj->ctype.laser_info.track_goal);
 526                 obj->ctype.laser_info.multiplier                = INTEL_INT(obj->ctype.laser_info.multiplier);
 527                 break;
 528
 529         case CT_EXPLOSION:
 530                 obj->ctype.expl_info.spawn_time         = INTEL_INT(obj->ctype.expl_info.spawn_time);
 531                 obj->ctype.expl_info.delete_time        = INTEL_INT(obj->ctype.expl_info.delete_time);
 532                 obj->ctype.expl_info.delete_objnum      = INTEL_SHORT(obj->ctype.expl_info.delete_objnum);
 533                 obj->ctype.expl_info.attach_parent      = INTEL_SHORT(obj->ctype.expl_info.attach_parent);
 534                 obj->ctype.expl_info.prev_attach        = INTEL_SHORT(obj->ctype.expl_info.prev_attach);
 535                 obj->ctype.expl_info.next_attach        = INTEL_SHORT(obj->ctype.expl_info.next_attach);
 536                 break;
 537
 538         case CT_AI:
 539                 obj->ctype.ai_info.hide_segment                 = INTEL_SHORT(obj->ctype.ai_info.hide_segment);
 540                 obj->ctype.ai_info.hide_index                   = INTEL_SHORT(obj->ctype.ai_info.hide_index);
 541                 obj->ctype.ai_info.path_length                  = INTEL_SHORT(obj->ctype.ai_info.path_length);
 542                 obj->ctype.ai_info.danger_laser_num             = INTEL_SHORT(obj->ctype.ai_info.danger_laser_num);
 543                 obj->ctype.ai_info.danger_laser_signature = INTEL_INT(obj->ctype.ai_info.danger_laser_signature);
 544                 obj->ctype.ai_info.dying_start_time     = INTEL_INT(obj->ctype.ai_info.dying_start_time);
 545                 break;
 546
 547         case CT_LIGHT:
 548                 obj->ctype.light_info.intensity = INTEL_INT(obj->ctype.light_info.intensity);
 549                 break;
 550
 551         case CT_POWERUP:
 552                 obj->ctype.powerup_info.count = INTEL_INT(obj->ctype.powerup_info.count);
 553                 obj->ctype.powerup_info.creation_time = INTEL_INT(obj->ctype.powerup_info.creation_time);
 554                 //Below commented out 5/2/96 by Matt.  I asked Allender why it was
 555                 //here, and he didn't know, and it looks like it doesn't belong.
 556                 //if (obj->id == POW_VULCAN_WEAPON)
 557                 //      obj->ctype.powerup_info.count = VULCAN_WEAPON_AMMO_AMOUNT;
 558                 break;
 559
 560         }
 561
 562         switch (obj->render_type) {
 563
 564         case RT_MORPH:
 565         case RT_POLYOBJ: {
 566                 int i;
 567
 568                 obj->rtype.pobj_info.model_num          = INTEL_INT(obj->rtype.pobj_info.model_num);
 569
 570                 for (i=0;i<MAX_SUBMODELS;i++) {
 571                         obj->rtype.pobj_info.anim_angles[i].p = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].p);
 572                         obj->rtype.pobj_info.anim_angles[i].b = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].b);
 573                         obj->rtype.pobj_info.anim_angles[i].h = INTEL_INT(obj->rtype.pobj_info.anim_angles[i].h);
 574                 }
 575
 576                 obj->rtype.pobj_info.subobj_flags       = INTEL_INT(obj->rtype.pobj_info.subobj_flags);
 577                 obj->rtype.pobj_info.tmap_override      = INTEL_INT(obj->rtype.pobj_info.tmap_override);
 578                 obj->rtype.pobj_info.alt_textures       = INTEL_INT(obj->rtype.pobj_info.alt_textures);
 579                 break;
 580         }
 581
 582         case RT_WEAPON_VCLIP:
 583         case RT_HOSTAGE:
 584         case RT_POWERUP:
 585         case RT_FIREBALL:
 586                 obj->rtype.vclip_info.vclip_num = INTEL_INT(obj->rtype.vclip_info.vclip_num);
 587                 obj->rtype.vclip_info.frametime = INTEL_INT(obj->rtype.vclip_info.frametime);
 588                 break;
 589
 590         case RT_LASER:
 591                 break;
 592
 593         }
 594 //  END OF SWAPPING OBJECT STRUCTURE
 595
 596 }
 597
 598 #else /* !WORDS_BIGENDIAN */
 599
 600
 601 // Calculates the checksum of a block of memory.
 602 ushort netmisc_calc_checksum( void * vptr, int len )
 603 {
 604         ubyte * ptr = (ubyte *)vptr;
 605         unsigned int sum1,sum2;
 606
 607         sum1 = sum2 = 0;
 608
 609         while(len--)    {
 610                 sum1 += *ptr++;
 611                 if (sum1 >= 255 ) sum1 -= 255;
 612                 sum2 += sum1;
 613         }
 614         sum2 %= 255;
 615
 616         return ((sum1<<8)+ sum2);
 617 }
 618
 619 #endif /* WORDS_BIGENDIAN */
 620
 621 //--unused-- //Finds the difference between block1 and block2.  Fills in diff_buffer and
 622 //--unused-- //returns the size of diff_buffer.
 623 //--unused-- int netmisc_find_diff( void *block1, void *block2, int block_size, void *diff_buffer )
 624 //--unused-- {
 625 //--unused--    int mode;
 626 //--unused--    ushort *c1, *c2, *diff_start, *c3;
 627 //--unused--    int i, j, size, diff, n , same;
 628 //--unused--
 629 //--unused--    size=(block_size+1)/sizeof(ushort);
 630 //--unused--    c1 = (ushort *)block1;
 631 //--unused--    c2 = (ushort *)block2;
 632 //--unused--    c3 = (ushort *)diff_buffer;
 633 //--unused--
 634 //--unused--    mode = same = diff = n = 0;
 635 //--unused--
 636 //--unused--    //mprintf( 0, "=================================\n" );
 637 //--unused--
 638 //--unused--    for (i=0; i<size; i++, c1++, c2++ )     {
 639 //--unused--            if (*c1 != *c2 ) {
 640 //--unused--                    if (mode==0)    {
 641 //--unused--                            mode = 1;
 642 //--unused--                            //mprintf( 0, "%ds ", same );
 643 //--unused--                            c3[n++] = same;
 644 //--unused--                            same=0; diff=0;
 645 //--unused--                            diff_start = c2;
 646 //--unused--                    }
 647 //--unused--                    *c1 = *c2;
 648 //--unused--                    diff++;
 649 //--unused--                    if (diff==65535) {
 650 //--unused--                            mode = 0;
 651 //--unused--                            // send how many diff ones.
 652 //--unused--                            //mprintf( 0, "%dd ", diff );
 653 //--unused--                            c3[n++]=diff;
 654 //--unused--                            // send all the diff ones.
 655 //--unused--                            for (j=0; j<diff; j++ )
 656 //--unused--                                    c3[n++] = diff_start[j];
 657 //--unused--                            same=0; diff=0;
 658 //--unused--                            diff_start = c2;
 659 //--unused--                    }
 660 //--unused--            } else {
 661 //--unused--                    if (mode==1)    {
 662 //--unused--                            mode=0;
 663 //--unused--                            // send how many diff ones.
 664 //--unused--                            //mprintf( 0, "%dd ", diff );
 665 //--unused--                            c3[n++]=diff;
 666 //--unused--                            // send all the diff ones.
 667 //--unused--                            for (j=0; j<diff; j++ )
 668 //--unused--                                    c3[n++] = diff_start[j];
 669 //--unused--                            same=0; diff=0;
 670 //--unused--                            diff_start = c2;
 671 //--unused--                    }
 672 //--unused--                    same++;
 673 //--unused--                    if (same==65535)        {
 674 //--unused--                            mode=1;
 675 //--unused--                            // send how many the same
 676 //--unused--                            //mprintf( 0, "%ds ", same );
 677 //--unused--                            c3[n++] = same;
 678 //--unused--                            same=0; diff=0;
 679 //--unused--                            diff_start = c2;
 680 //--unused--                    }
 681 //--unused--            }
 682 //--unused--
 683 //--unused--    }
 684 //--unused--    if (mode==0)    {
 685 //--unused--            // send how many the same
 686 //--unused--            //mprintf( 0, "%ds ", same );
 687 //--unused--            c3[n++] = same;
 688 //--unused--    } else {
 689 //--unused--            // send how many diff ones.
 690 //--unused--            //mprintf( 0, "%dd ", diff );
 691 //--unused--            c3[n++]=diff;
 692 //--unused--            // send all the diff ones.
 693 //--unused--            for (j=0; j<diff; j++ )
 694 //--unused--                    c3[n++] = diff_start[j];
 695 //--unused--    }
 696 //--unused--
 697 //--unused--    //mprintf( 0, "=================================\n" );
 698 //--unused--
 699 //--unused--    return n*2;
 700 //--unused-- }
 701
 702 //--unused-- //Applies diff_buffer to block1 to create a new block1.  Returns the final
 703 //--unused-- //size of block1.
 704 //--unused-- int netmisc_apply_diff(void *block1, void *diff_buffer, int diff_size )
 705 //--unused-- {
 706 //--unused--    unsigned int i, j, n, size;
 707 //--unused--    ushort *c1, *c2;
 708 //--unused--
 709 //--unused--    //mprintf( 0, "=================================\n" );
 710 //--unused--    c1 = (ushort *)diff_buffer;
 711 //--unused--    c2 = (ushort *)block1;
 712 //--unused--
 713 //--unused--    size = diff_size/2;
 714 //--unused--
 715 //--unused--    i=j=0;
 716 //--unused--    while (1)       {
 717 //--unused--            j += c1[i];                     // Same
 718 //--unused--            //mprintf( 0, "%ds ", c1[i] );
 719 //--unused--            i++;
 720 //--unused--            if ( i>=size) break;
 721 //--unused--            n = c1[i];                      // ndiff
 722 //--unused--            //mprintf( 0, "%dd ", c1[i] );
 723 //--unused--            i++;
 724 //--unused--            if (n>0)        {
 725 //--unused--                    //Assert( n* < 256 );
 726 //--unused--                    memcpy( &c2[j], &c1[i], n*2 );
 727 //--unused--                    i += n;
 728 //--unused--                    j += n;
 729 //--unused--            }
 730 //--unused--            if ( i>=size) break;
 731 //--unused--    }
 732 //--unused--    //mprintf( 0, "=================================\n" );
 733 //--unused--
 734 //--unused--    return j*2;
 735 //--unused-- }
 736