arch/dos/bak/ipx.c

   1 /* $Id: ipx.c,v 1.3 2003-10-03 07:58:14 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 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 /*
  16  *
  17  * Routines for IPX communications.
  18  *
  19  * Old Log:
  20  * Revision 2.10  1995/03/29  17:27:55  john
  21  * Added code to not duplicate broadcasts.
  22  *
  23  * Revision 2.9  1995/03/29  15:32:07  john
  24  * NEatened.
  25  *
  26  * Revision 2.8  1995/03/29  15:07:31  john
  27  * Added network support.
  28  *
  29  * Revision 2.7  1995/03/29  11:22:27  john
  30  * Added broadcasting over a net.
  31  *
  32  * Revision 2.6  1995/03/28  20:05:03  john
  33  * Took away alternate server stuff.
  34  *
  35  * Revision 2.5  1995/03/23  19:14:29  john
  36  * Added better MAX_USERS message.
  37  *
  38  * Revision 2.4  1995/03/23  19:00:02  john
  39  * Added user list capabitly.
  40  *
  41  * Revision 2.3  1995/03/23  12:27:05  john
  42  * Move IPX into bios lib.
  43  *
  44  * Revision 2.2  1995/03/22  19:08:15  john
  45  * Added code to fix sending packets over router... now
  46  * we just need to make broadcasts go over router!!
  47  *
  48  * Revision 2.1  1995/03/21  08:40:16  john
  49  * Ifdef'd out the NETWORK code.
  50  *
  51  * Revision 2.0  1995/02/27  11:30:45  john
  52  * New version 2.0, which has no anonymous unions, builds with
  53  * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
  54  *
  55  * Revision 1.31  1995/02/16  17:35:03  john
  56  * Added code to allow dynamic socket changing.
  57  *
  58  * Revision 1.30  1995/02/01  21:03:45  john
  59  * Lintified.
  60  *
  61  * Revision 1.29  1995/01/22  14:31:05  john
  62  * Added key.h
  63  *
  64  * Revision 1.28  1995/01/22  14:29:26  john
  65  * Added code to bypass broadcast messages.
  66  *
  67  * Revision 1.27  1995/01/03  13:46:16  john
  68  * Added code that should make ipx work over different servers,
  69  * but ifdef'd it out with SHAREWARE in ipx.c.  I haven't tested
  70  * this, and I hope it doesn't introduce net bugs.
  71  *
  72  * Revision 1.26  1994/12/14  11:54:37  rob
  73  * Reduce # of ipx packets.
  74  *
  75  * Revision 1.25  1994/12/11  00:43:28  john
  76  * Locked down DOS ipx buffers... probably not necessary, tho.
  77  *
  78  * Revision 1.24  1994/12/08  15:49:58  rob
  79  * Bumped up the # of ipx packets.
  80  *
  81  * Revision 1.23  1994/12/04  15:23:54  rob
  82  * Reduced packet # constants.
  83  *
  84  * Revision 1.22  1994/11/27  23:12:39  matt
  85  * Made changes for new mprintf calling convention
  86  *
  87  * Revision 1.21  1994/11/19  15:15:19  mike
  88  * remove unused code and data
  89  *
  90  * Revision 1.20  1994/11/10  11:06:07  rob
  91  * Raised number of ipx packets to 64 and buffers to 128 (for 8-way games)
  92  * Removed (commented out) all the spx support stuff.
  93  *
  94  * Revision 1.19  1994/11/07  17:50:12  rob
  95  * Bumped up max_packets and ipx_num_packets to double their previous
  96  * values.
  97  *
  98  * Revision 1.18  1994/11/07  15:39:01  rob
  99  * Removed temporary hacked ipx_send_object function.
 100  * Replaced with a more general thing.
 101  *
 102  * Revision 1.17  1994/11/05  16:08:40  rob
 103  * Made a change necessary for object syncing on rejoin.
 104  *
 105  * Revision 1.16  1994/11/01  15:57:12  rob
 106  * Added support for SPX sockets for critical messages.
 107  *
 108  * Revision 1.15  1994/10/31  19:21:01  rob
 109  * Added a routine for sending objects via ipx.  Its a hack and shoukld
 110  * be replaced by something more general time permitting.
 111  *
 112  * Revision 1.14  1994/10/20  14:57:42  john
 113  * Some test stuff.
 114  *
 115  * Revision 1.13  1994/10/20  11:22:45  john
 116  * Tweaked the number of waiting packets. Added code to print
 117  * total packets missed, and to limit the packet send rate to
 118  * 10 packets per second unless firing.
 119  *
 120  * Revision 1.12  1994/10/03  20:50:11  john
 121  * Started adding sound pause functions.
 122  *
 123  * Revision 1.11  1994/09/15  08:54:24  mike
 124  * comment out a mprintf.
 125  *
 126  * Revision 1.10  1994/09/12  19:38:20  john
 127  * Made some stuff that prints to the DOS screen go to the
 128  * mono instead, since it really is debugging info.
 129  *
 130  * Revision 1.9  1994/09/07  13:32:03  john
 131  * Made ipx_close explicitly close the socket we were using,
 132  * because it seems that VLM's don't automatically close them
 133  * like the older NETX stuff did (Going from Novell 3.11 driver
 134  * to 3.12 anyway).
 135  *
 136  * Revision 1.8  1994/09/06  19:29:20  john
 137  * Added trial version of rejoin function.
 138  *
 139  * Revision 1.7  1994/08/09  19:31:50  john
 140  * Networking changes.
 141  *
 142  * Revision 1.6  1994/08/05  16:11:41  john
 143  * Psuedo working version of networking.
 144  *
 145  * Revision 1.5  1994/08/04  19:17:21  john
 146  * Inbetween version of network stuff.
 147  *
 148  * Revision 1.4  1994/07/29  16:08:57  john
 149  * *** empty log message ***
 150  *
 151  * Revision 1.3  1994/07/25  12:33:31  john
 152  * Network "pinging" in.
 153  *
 154  * Revision 1.2  1994/07/20  15:58:28  john
 155  * First installment of ipx stuff.
 156  *
 157  * Revision 1.1  1994/07/19  15:42:00  john
 158  * Initial revision
 159  *
 160  *
 161  */
 162
 163 #ifdef RCS
 164 static char rcsid[] = "$Id: ipx.c,v 1.3 2003-10-03 07:58:14 btb Exp $";
 165 #endif
 166
 167 #ifdef __GNUC__
 168 #define _BORLAND_DOS_REGS 1
 169 #define far
 170 #endif
 171
 172 #include <i86.h>
 173 #include <dos.h>
 174 #include <stdio.h>
 175 #include <string.h>
 176 #include <malloc.h>
 177 #include <stdlib.h>
 178 #include <conio.h>
 179 #include <assert.h>
 180
 181 #include "types.h"
 182 #include "timer.h"
 183 #include "ipx.h"
 184 #include "error.h"
 185 #include "u_dpmi.h"
 186 #include "key.h"
 187
 188 typedef unsigned char BYTE;
 189 typedef unsigned short WORD;
 190 typedef unsigned long DWORD;
 191
 192 typedef struct local_address {
 193         ubyte address[6];
 194 } __pack__ local_address;
 195
 196 typedef struct net_address {
 197         BYTE                            network_id[4];
 198         local_address   node_id;
 199         WORD                            socket_id;
 200 } __pack__ net_address;
 201
 202 typedef struct ipx_header {
 203         WORD                    checksum;
 204         WORD                    length;
 205         BYTE                    transport_control;
 206         BYTE                    packet_type;
 207         net_address     destination;
 208         net_address     source;
 209 } __pack__ ipx_header;
 210
 211 typedef struct ecb_header {
 212         WORD                    link[2];
 213         WORD                    esr_address[2];
 214         BYTE                    in_use;
 215         BYTE                    completion_code;
 216         WORD                    socket_id;
 217         BYTE                    ipx_reserved[14];
 218         WORD                    connection_id;
 219         local_address immediate_address;
 220         WORD                    fragment_count;
 221         WORD                    fragment_pointer[2];
 222         WORD                    fragment_size;
 223 } __pack__ ecb_header;
 224
 225 typedef struct packet_data {
 226         int                     packetnum;
 227         byte                    data[IPX_MAX_DATA_SIZE];
 228 } __pack__ packet_data;
 229
 230 typedef struct ipx_packet {
 231         ecb_header      ecb;
 232         ipx_header      ipx;
 233         packet_data     pd;
 234 } __pack__ ipx_packet;
 235
 236 typedef struct user_address {
 237         ubyte network[4];
 238         ubyte node[6];
 239         ubyte address[6];
 240 } __pack__ user_address;
 241
 242 #define MAX_USERS 64
 243 int Ipx_num_users = 0;
 244 user_address Ipx_users[MAX_USERS];
 245
 246 #define MAX_NETWORKS 64
 247 int Ipx_num_networks = 0;
 248 uint Ipx_networks[MAX_NETWORKS];
 249
 250 int ipx_packetnum = 0;
 251
 252 #define MAX_PACKETS 64
 253
 254 static packet_data packet_buffers[MAX_PACKETS];
 255 static short packet_free_list[MAX_PACKETS];
 256 static int num_packets = 0;
 257 static int largest_packet_index = 0;
 258 static short packet_size[MAX_PACKETS];
 259
 260 //added on 10/29/98 by Kevin Bently to add ipx stuff
 261 WORD ipx_num_outgoing_packets = 8;
 262 ipx_packet * outpackets;
 263 //end this section addition - Kevin Bently
 264
 265 WORD ipx_socket=0;
 266 ubyte ipx_installed=0;
 267 WORD ipx_vector_segment;
 268 WORD ipx_vector_offset;
 269 ubyte ipx_socket_life = 0;      // 0=closed at prog termination, 0xff=closed when requested.
 270 DWORD ipx_network = 0;
 271 local_address ipx_my_node;
 272 WORD ipx_num_packets=32;                // 32 Ipx packets
 273 ipx_packet * packets;
 274 int neterrors = 0;
 275 ushort ipx_packets_selector;
 276
 277 ecb_header * last_ecb=NULL;
 278 int lastlen=0;
 279
 280 void got_new_packet( ecb_header * ecb );
 281 void ipx_listen_for_packet(ecb_header * ecb );
 282
 283 void free_packet( int id )
 284 {
 285         packet_buffers[id].packetnum = -1;
 286         packet_free_list[ --num_packets ] = id;
 287         if (largest_packet_index==id)
 288                 while ((--largest_packet_index>0) && (packet_buffers[largest_packet_index].packetnum == -1 ));
 289 }
 290
 291 int ipx_get_packet_data( ubyte * data )
 292 {
 293         int i, n, best, best_id, size;
 294
 295         for (i=1; i<ipx_num_packets; i++ )      {
 296                 if ( !packets[i].ecb.in_use )   {
 297                         got_new_packet( &packets[i].ecb );
 298                         packets[i].ecb.in_use = 0;
 299                         ipx_listen_for_packet(&packets[i].ecb);
 300                 }
 301         }
 302
 303         best = -1;
 304         n = 0;
 305         best_id = -1;
 306
 307         for (i=0; i<=largest_packet_index; i++ )        {
 308                 if ( packet_buffers[i].packetnum > -1 ) {
 309                         n++;
 310                         if ( best == -1 || (packet_buffers[i].packetnum<best) ) {
 311                                 best = packet_buffers[i].packetnum;
 312                                 best_id = i;
 313                         }
 314                 }
 315         }
 316
 317         //mprintf( (0, "Best id = %d, pn = %d, last_ecb = %x, len=%x, ne = %d\n", best_id, best, last_ecb, lastlen, neterrors ));
 318         //mprintf( (1, "<%d> ", neterrors ));
 319
 320         if ( best_id < 0 ) return 0;
 321
 322         size = packet_size[best_id];
 323         memcpy( data, packet_buffers[best_id].data, size );
 324         free_packet(best_id);
 325
 326         return size;
 327 }
 328
 329 #ifndef __GNUC__
 330 unsigned int swap_short( unsigned int short )
 331 #pragma aux swap_short parm [eax] = "xchg al,ah";
 332 #else
 333 static inline unsigned int swap_short( unsigned int sshort ) {
 334         int __retval;
 335         asm("xchg %%ah,%%al" : "=a" (__retval) : "a" (sshort));
 336         return __retval;
 337 }
 338 #endif
 339
 340 void got_new_packet( ecb_header * ecb )
 341 {
 342         ipx_packet * p;
 343         int id;
 344         unsigned short datasize;
 345
 346         datasize = 0;
 347         last_ecb = ecb;
 348         p = (ipx_packet *)ecb;
 349
 350         if ( p->ecb.in_use ) { neterrors++; return; }
 351         if      ( p->ecb.completion_code )      { neterrors++; return; }
 352
 353         //      Error( "Recieve error %d for completion code", p->ecb.completion_code );
 354
 355         if ( memcmp( &p->ipx.source.node_id, &ipx_my_node, 6 ) )        {
 356                 datasize=swap_short(p->ipx.length);
 357                 lastlen=datasize;
 358                 datasize -= sizeof(ipx_header);
 359                 // Find slot to put packet in...
 360                 if ( datasize > 0 && datasize <= sizeof(packet_data) )  {
 361                         if ( num_packets >= MAX_PACKETS ) {
 362                                 //printf( 1, "IPX: Packet buffer overrun!!!\n" );
 363                                 neterrors++;
 364                                 return;
 365                         }
 366                         id = packet_free_list[ num_packets++ ];
 367                         if (id > largest_packet_index ) largest_packet_index = id;
 368                         packet_size[id] = datasize-sizeof(int);
 369                         packet_buffers[id].packetnum =  p->pd.packetnum;
 370                         if ( packet_buffers[id].packetnum < 0 ) { neterrors++; return; }
 371                         memcpy( packet_buffers[id].data, p->pd.data, packet_size[id] );
 372                 } else {
 373                         neterrors++; return;
 374                 }
 375         }
 376         // Repost the ecb
 377         p->ecb.in_use = 0;
 378         //ipx_listen_for_packet(&p->ecb);
 379 }
 380
 381 ubyte * ipx_get_my_local_address()
 382 {
 383         return ipx_my_node.address;
 384 }
 385
 386 ubyte * ipx_get_my_server_address()
 387 {
 388         return (ubyte *)&ipx_network;
 389 }
 390
 391 void ipx_listen_for_packet(ecb_header * ecb )
 392 {
 393         dpmi_real_regs rregs;
 394         ecb->in_use = 0x1d;
 395         memset(&rregs,0,sizeof(dpmi_real_regs));
 396         rregs.ebx = 4;  // Listen For Packet function
 397         rregs.esi = DPMI_real_offset(ecb);
 398         rregs.es = DPMI_real_segment(ecb);
 399         dpmi_real_int386x( 0x7A, &rregs );
 400 }
 401
 402 void ipx_cancel_listen_for_packet(ecb_header * ecb )
 403 {
 404         dpmi_real_regs rregs;
 405         memset(&rregs,0,sizeof(dpmi_real_regs));
 406         rregs.ebx = 6;  // IPX Cancel event
 407         rregs.esi = DPMI_real_offset(ecb);
 408         rregs.es = DPMI_real_segment(ecb);
 409         dpmi_real_int386x( 0x7A, &rregs );
 410 }
 411
 412
 413 void ipx_send_packet(ecb_header * ecb )
 414 {
 415         dpmi_real_regs rregs;
 416         memset(&rregs,0,sizeof(dpmi_real_regs));
 417         rregs.ebx = 3;  // Send Packet function
 418         rregs.esi = DPMI_real_offset(ecb);
 419         rregs.es = DPMI_real_segment(ecb);
 420         dpmi_real_int386x( 0x7A, &rregs );
 421 }
 422
 423 typedef struct {
 424         ubyte   network[4];
 425         ubyte           node[6];
 426         ubyte           local_target[6];
 427 } __pack__ net_xlat_info;
 428
 429 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 430 {
 431         net_xlat_info * info;
 432         dpmi_real_regs rregs;
 433
 434         // Get dos memory for call...
 435         info = (net_xlat_info *)dpmi_get_temp_low_buffer( sizeof(net_xlat_info) );
 436         assert( info != NULL );
 437         memcpy( info->network, server, 4 );
 438         memcpy( info->node, node, 6 );
 439
 440         memset(&rregs,0,sizeof(dpmi_real_regs));
 441
 442         rregs.ebx = 2;          // Get Local Target
 443         rregs.es = DPMI_real_segment(info);
 444         rregs.esi = DPMI_real_offset(info->network);
 445         rregs.edi = DPMI_real_offset(info->local_target);
 446
 447         dpmi_real_int386x( 0x7A, &rregs );
 448
 449         // Save the local target...
 450         memcpy( local_target, info->local_target, 6 );
 451 }
 452
 453 void ipx_close()
 454 {
 455         dpmi_real_regs rregs;
 456         if ( ipx_installed )    {
 457                 // When using VLM's instead of NETX, the sockets don't
 458                 // seem to automatically get closed, so we must explicitly
 459                 // close them at program termination.
 460                 ipx_installed = 0;
 461                 memset(&rregs,0,sizeof(dpmi_real_regs));
 462                 rregs.edx = ipx_socket;
 463                 rregs.ebx = 1;  // Close socket
 464                 dpmi_real_int386x( 0x7A, &rregs );
 465         }
 466 }
 467
 468
 469 //---------------------------------------------------------------
 470 // Initializes all IPX internals.
 471 // If socket_number==0, then opens next available socket.
 472 // Returns one of the constants defined in include/ipx.h
 473
 474 int ipx_init( int socket_number, int show_address )
 475 {
 476         dpmi_real_regs rregs;
 477         ubyte *ipx_real_buffer;
 478         int i;
 479
 480         atexit(ipx_close);
 481
 482         ipx_packetnum = 0;
 483
 484         // init packet buffers.
 485         for (i=0; i<MAX_PACKETS; i++ )  {
 486                 packet_buffers[i].packetnum = -1;
 487                 packet_free_list[i] = i;
 488         }
 489         num_packets = 0;
 490         largest_packet_index = 0;
 491
 492         // Get the IPX vector
 493         memset(&rregs,0,sizeof(dpmi_real_regs));
 494         rregs.eax=0x00007a00;
 495         dpmi_real_int386x( 0x2f, &rregs );
 496
 497         if ( (rregs.eax & 0xFF) != 0xFF )       {
 498                 return IPX_NOT_INSTALLED;
 499         }
 500         ipx_vector_offset = rregs.edi & 0xFFFF;
 501         ipx_vector_segment = rregs.es;
 502         //printf( "IPX entry point at %.4x:%.4x\n", ipx_vector_segment, ipx_vector_offset );
 503
 504         // Open a socket for IPX
 505
 506         memset(&rregs,0,sizeof(dpmi_real_regs));
 507         swab( (char *)&socket_number,(char *)&ipx_socket, 2 );
 508         rregs.edx = ipx_socket;
 509         rregs.eax = ipx_socket_life;
 510         rregs.ebx = 0;  // Open socket
 511         dpmi_real_int386x( 0x7A, &rregs );
 512
 513         ipx_socket = rregs.edx & 0xFFFF;
 514
 515         if ( rregs.eax & 0xFF ) {
 516                 //mprintf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 517                 return IPX_SOCKET_TABLE_FULL;
 518         }
 519
 520         ipx_installed = 1;
 521
 522         // Find our internetwork address
 523         ipx_real_buffer = dpmi_get_temp_low_buffer( 1024 );     // 1k block
 524         if ( ipx_real_buffer == NULL )  {
 525                 //printf( "Error allocation realmode memory\n" );
 526                 return IPX_NO_LOW_DOS_MEM;
 527         }
 528
 529         memset(&rregs,0,sizeof(dpmi_real_regs));
 530         rregs.ebx = 9;          // Get internetwork address
 531         rregs.esi = DPMI_real_offset(ipx_real_buffer);
 532         rregs.es = DPMI_real_segment(ipx_real_buffer);
 533         dpmi_real_int386x( 0x7A, &rregs );
 534
 535         if ( rregs.eax & 0xFF ) {
 536                 //printf( "Error getting internetwork address!\n" );
 537                 return IPX_SOCKET_TABLE_FULL;
 538         }
 539
 540         memcpy( &ipx_network, ipx_real_buffer, 4 );
 541         memcpy( &ipx_my_node, &ipx_real_buffer[4], 6 );
 542
 543         Ipx_num_networks = 0;
 544         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 545
 546         if ( show_address )     {
 547                 printf( "My IPX addresss is " );
 548                 printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 549                 printf( "%02X%02X%02X%02X%02X%02X\n", ipx_real_buffer[4],ipx_real_buffer[5],ipx_real_buffer[6],ipx_real_buffer[7],ipx_real_buffer[8],ipx_real_buffer[9] );
 550                 printf( "\n" );
 551         }
 552
 553         packets = dpmi_real_malloc( sizeof(ipx_packet)*ipx_num_packets, &ipx_packets_selector );
 554         if ( packets == NULL )  {
 555                 //printf( "Couldn't allocate real memory for %d packets\n", ipx_num_packets );
 556                 return IPX_NO_LOW_DOS_MEM;
 557         }
 558 #if 0 /* adb: not needed, fails with cwsdpmi */
 559         if (!dpmi_lock_region( packets, sizeof(ipx_packet)*ipx_num_packets ))   {
 560                 //printf( "Couldn't lock real memory for %d packets\n", ipx_num_packets );
 561                 return IPX_NO_LOW_DOS_MEM;
 562         }
 563 #endif
 564         memset( packets, 0, sizeof(ipx_packet)*ipx_num_packets );
 565
 566         for (i=1; i<ipx_num_packets; i++ )      {
 567                 packets[i].ecb.in_use = 0x1d;
 568                 //packets[i].ecb.in_use = 0;
 569                 packets[i].ecb.socket_id = ipx_socket;
 570                 packets[i].ecb.fragment_count = 1;
 571                 packets[i].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[i].ipx);
 572                 packets[i].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[i].ipx);
 573                 packets[i].ecb.fragment_size = sizeof(ipx_packet)-sizeof(ecb_header);                   //-sizeof(ecb_header);
 574
 575                 ipx_listen_for_packet(&packets[i].ecb);
 576         }
 577
 578 //added/replaced on 10/29/98 by Kevin Bently for new ipx stuff
 579 //-killed-        packets[0].ecb.socket_id = ipx_socket;
 580 //-killed-        packets[0].ecb.fragment_count = 1;
 581 //-killed-        packets[0].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[0].ipx);
 582 //-killed-        packets[0].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[0].ipx);
 583 //-killed-        packets[0].ipx.packet_type = 4;         // IPX packet
 584 //-killed-        packets[0].ipx.destination.socket_id = ipx_socket;
 585 //-killed-//      memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 586 //-killed-        memset( packets[0].ipx.destination.network_id, 0, 4 );
 587 outpackets = dpmi_real_malloc( sizeof(ipx_packet)*ipx_num_packets, &ipx_packets_selector);
 588
 589      for(i=0;i<ipx_num_outgoing_packets;i++)
 590       {
 591         outpackets[i].ecb.socket_id = ipx_socket;
 592         outpackets[i].ecb.fragment_count = 1;
 593         outpackets[i].ecb.fragment_pointer[0] = DPMI_real_offset(&outpackets[i].ipx);
 594         outpackets[i].ecb.fragment_pointer[1] = DPMI_real_segment(&outpackets[i].ipx);
 595         outpackets[i].ipx.packet_type = 4;              // IPX packet
 596         outpackets[i].ipx.destination.socket_id = ipx_socket;
 597         memset( outpackets[i].ipx.destination.network_id, 0, 4 );
 598       }
 599
 600
 601 //end this section replace - Kevin Bently
 602         return IPX_INIT_OK;
 603 }
 604
 605 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 606 {
 607         int i;
 608         ipx_packet *sendpacket = NULL;
 609
 610         assert(ipx_installed);
 611
 612         if ( datasize >= IPX_MAX_DATA_SIZE )    {
 613                 printf( "Data too big\n" );
 614                 exit(1);
 615         }
 616
 617
 618
 619 //added/replaced on 10/29/98 by Kevin Bently for new ipx stuff
 620 //-killed-        // Make sure no one is already sending something
 621 //-killed-        while( packets[0].ecb.in_use )
 622 //-killed-        {
 623 //-killed-        }
 624 //-killed-
 625 //-killed-        if (packets[0].ecb.completion_code)     {
 626 //-killed-                printf( "Send error %d for completion code\n", packets[0].ecb.completion_code );
 627 //-killed-               //killed on 10/25/98 by Victor Rachels to fix LAN crash
 628 //-killed-               //-killed- exit(1);
 629 //-killed-               //end this section kill - Victor
 630 //-killed-        }
 631         while(!sendpacket)
 632          for(i=0;i<ipx_num_outgoing_packets;i++)
 633           if(!outpackets[i].ecb.in_use)
 634            sendpacket= &outpackets[i];
 635 //end this section replacement - Kevin Bently
 636
 637         // Fill in destination address
 638         if ( memcmp( network, &ipx_network, 4 ) )
 639                 memcpy( sendpacket->ipx.destination.network_id, network, 4 );
 640         else
 641                 memset( sendpacket->ipx.destination.network_id, 0, 4 );
 642         memcpy( sendpacket->ipx.destination.node_id.address, address, 6 );
 643         memcpy( sendpacket->ecb.immediate_address.address, immediate_address, 6 );
 644         sendpacket->pd.packetnum = ipx_packetnum++;
 645
 646         // Fill in data to send
 647         sendpacket->ecb.fragment_size = sizeof(ipx_header) + sizeof(int) + datasize;
 648
 649         assert( datasize > 1 );
 650         assert( sendpacket->ecb.fragment_size <= 576 );
 651
 652         memcpy( sendpacket->pd.data, data, datasize );
 653
 654         // Send it
 655         ipx_send_packet( &sendpacket->ecb );
 656
 657 }
 658
 659 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 660 {
 661         int i, j;
 662         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 663         ubyte local_address[6];
 664
 665         // Set to all networks besides mine
 666         for (i=0; i<Ipx_num_networks; i++ )     {
 667                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 668                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 669                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 670                 } else {
 671                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 672                 }
 673         }
 674
 675         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 676
 677         // Send directly to all users not on my network or in the network list.
 678         for (i=0; i<Ipx_num_users; i++ )        {
 679                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 680                         for (j=0; j<Ipx_num_networks; j++ )             {
 681                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 682                                         goto SkipUser;
 683                         }
 684                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 685 SkipUser:
 686                         j = 0;
 687                 }
 688         }
 689 }
 690
 691 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 692 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 693 {
 694         ubyte local_address[6];
 695
 696         if ( (*(uint *)server) != 0 )   {
 697                 ipx_get_local_target( server, address, local_address );
 698                 ipx_send_packet_data( data, datasize, server, address, local_address );
 699         } else {
 700                 // Old method, no server info.
 701                 ipx_send_packet_data( data, datasize, server, address, address );
 702         }
 703 }
 704
 705 int ipx_change_default_socket( ushort socket_number )
 706 {
 707         int i;
 708         WORD new_ipx_socket;
 709         dpmi_real_regs rregs;
 710
 711         if ( !ipx_installed ) return -3;
 712
 713         // Open a new socket
 714         memset(&rregs,0,sizeof(dpmi_real_regs));
 715         swab( (char *)&socket_number,(char *)&new_ipx_socket, 2 );
 716         rregs.edx = new_ipx_socket;
 717         rregs.eax = ipx_socket_life;
 718         rregs.ebx = 0;  // Open socket
 719         dpmi_real_int386x( 0x7A, &rregs );
 720
 721         new_ipx_socket = rregs.edx & 0xFFFF;
 722
 723         if ( rregs.eax & 0xFF ) {
 724                 //printf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 725                 return -2;
 726         }
 727
 728         for (i=1; i<ipx_num_packets; i++ )      {
 729                 ipx_cancel_listen_for_packet(&packets[i].ecb);
 730         }
 731
 732         // Close existing socket...
 733         memset(&rregs,0,sizeof(dpmi_real_regs));
 734         rregs.edx = ipx_socket;
 735         rregs.ebx = 1;  // Close socket
 736         dpmi_real_int386x( 0x7A, &rregs );
 737
 738         ipx_socket = new_ipx_socket;
 739
 740         // Repost all listen requests on the new socket...
 741         for (i=1; i<ipx_num_packets; i++ )      {
 742                 packets[i].ecb.in_use = 0;
 743                 packets[i].ecb.socket_id = ipx_socket;
 744                 ipx_listen_for_packet(&packets[i].ecb);
 745         }
 746
 747         packets[0].ecb.socket_id = ipx_socket;
 748         packets[0].ipx.destination.socket_id = ipx_socket;
 749
 750         ipx_packetnum = 0;
 751         // init packet buffers.
 752         for (i=0; i<MAX_PACKETS; i++ )  {
 753                 packet_buffers[i].packetnum = -1;
 754                 packet_free_list[i] = i;
 755         }
 756         num_packets = 0;
 757         largest_packet_index = 0;
 758
 759         return 0;
 760 }
 761
 762 void ipx_read_user_file(char * filename)
 763 {
 764         FILE * fp;
 765         user_address tmp;
 766         char temp_line[132], *p1;
 767         int n, ln=0;
 768
 769         if (!filename) return;
 770
 771         Ipx_num_users = 0;
 772
 773         fp = fopen( filename, "rt" );
 774         if ( !fp ) return;
 775
 776         printf( "Broadcast Users:\n" );
 777
 778         while (fgets(temp_line, 132, fp)) {
 779                 ln++;
 780                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 781                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 782                 n = sscanf( temp_line, "%2x%2x%2x%2x/%2x%2x%2x%2x%2x%2x",(unsigned int *)&tmp.network[0],(unsigned int *) &tmp.network[1],(unsigned int *) &tmp.network[2],(unsigned int *) &tmp.network[3],(unsigned int *) &tmp.node[0],(unsigned int *) &tmp.node[1],(unsigned int *) &tmp.node[2],(unsigned int *)&tmp.node[3],(unsigned int *) &tmp.node[4],(unsigned int *) &tmp.node[5] );
 783 //                n = sscanf( temp_line, "%2x%2x%2x%2x/%2x%2x%2x%2x%2x%2x",&tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3], &tmp.node[0], &tmp.node[1], &tmp.node[2],&tmp.node[3], &tmp.node[4], &tmp.node[5] );
 784                 if ( n != 10 ) continue;
 785                 if ( Ipx_num_users < MAX_USERS )        {
 786                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 787                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 788                         Ipx_users[Ipx_num_users++] = tmp;
 789                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 790                         printf( "%02X%02X%02X%02X%02X%02X\n", ipx_real_buffer[4],ipx_real_buffer[5],ipx_real_buffer[6],ipx_real_buffer[7],ipx_real_buffer[8],ipx_real_buffer[9] );
 791                 } else {
 792                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 793                         fclose(fp);
 794                         return;
 795                 }
 796         }
 797         fclose(fp);
 798 }
 799
 800
 801 void ipx_read_network_file(char * filename)
 802 {
 803         FILE * fp;
 804         user_address tmp;
 805         char temp_line[132], *p1;
 806         int i, n, ln=0;
 807
 808         if (!filename) return;
 809
 810         fp = fopen( filename, "rt" );
 811         if ( !fp ) return;
 812
 813         printf( "Using Networks:\n" );
 814         for (i=0; i<Ipx_num_networks; i++ )             {
 815                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 816                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 817         }
 818
 819         while (fgets(temp_line, 132, fp)) {
 820                 ln++;
 821                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 822                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 823                 n = sscanf( temp_line, "%2x%2x%2x%2x",(unsigned int *) &tmp.network[0],(unsigned int *) &tmp.network[1],(unsigned int *) &tmp.network[2],(unsigned int *) &tmp.network[3] );
 824 //                n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 825                 if ( n != 4 ) continue;
 826                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 827                         int j;
 828                         for (j=0; j<Ipx_num_networks; j++ )
 829                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 830                                         break;
 831                         if ( j >= Ipx_num_networks )    {
 832                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 833                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 834                         }
 835                 } else {
 836                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 837                         fclose(fp);
 838                         return;
 839                 }
 840         }
 841         fclose(fp);
 842
 843 }
 844
 845 //---typedef struct rip_entry {
 846 //---   uint            network;
 847 //---   ushort  nhops;
 848 //---   ushort  nticks;
 849 //---} rip_entry;
 850 //---
 851 //---typedef struct rip_packet {
 852 //---   ushort          operation;              //1=request, 2=response
 853 //---   rip_entry       rip[50];
 854 //---} rip_packet;
 855 //---
 856 //---
 857 //---void  ipx_find_all_servers()
 858 //---{
 859 //---   int i;
 860 //---   rip_packet * rp;
 861 //---   assert(ipx_installed);
 862 //---
 863 //---   ipx_change_default_socket( 0x0453 );
 864 //---   //      ipx_change_default_socket( 0x5304 );
 865 //---
 866 //---   // Make sure no one is already sending something
 867 //---   while( packets[0].ecb.in_use )
 868 //---   {
 869 //---   }
 870 //---
 871 //---   if (packets[0].ecb.completion_code)     {
 872 //---           printf( "AAAA:Send error %d for completion code\n", packets[0].ecb.completion_code );
 873 //---           //exit(1);
 874 //---   }
 875 //---
 876 //---   rp = (rip_packet *)&packets[0].pd;
 877 //---
 878 //---   // Fill in destination address
 879 //---   {
 880 //---           char mzero1[] = {0,0,0,1};
 881 //---           char mzero[] = {0,0,0,0,0,1};
 882 //---           char immediate[6];
 883 //---           //memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 884 //---           //memcpy( packets[0].ipx.destination.node_id.address, ipx_my_node.address, 6 );
 885 //---
 886 //---           memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 887 //---           memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 888 //---
 889 //---           memcpy( packets[0].ipx.destination.socket_id, &ipx_socket, 2 );
 890 //---           memcpy( packets[0].ipx.source.network_id, &ipx_network, 4 );
 891 //---           memcpy( packets[0].ipx.source.node_id.address, ipx_my_node.address, 6 );
 892 //---           memcpy( packets[0].ipx.source.socket_id, &ipx_socket, 2 );
 893 //---           //memcpy( packets[0].ecb.immediate_address.address, ipx_my_node.address, 6 );
 894 //---           //mzero1[3] = 1;
 895 //---           //memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 896 //---           //mzero[5] = 1;
 897 //---           //memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 898 //---           //ipx_get_local_target( mzero1, mzero, immediate );
 899 //---           //memcpy( packets[0].ecb.immediate_address.address, mzero, 6 );
 900 //---           //memcpy( packets[0].ecb.immediate_address.address, immediate, 6 );
 901 //---           //mzero[5] = 0;
 902 //---   }
 903 //---
 904 //---   packets[0].ipx.packet_type = 1;         // RIP packet
 905 //---
 906 //---   // Fill in data to send
 907 //---   packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(rip_packet);
 908 //---   assert( packets[0].ecb.fragment_size <= 576 );
 909 //---
 910 //---   rp->operation = 0;              // Request
 911 //---   for (i=0;i<50; i++)     {
 912 //---           rp->rip[i].network = 0xFFFFFFFF;
 913 //---           rp->rip[i].nhops = 0;
 914 //---           rp->rip[i].nticks = 0;
 915 //---   }
 916 //---
 917 //---   // Send it
 918 //---   ipx_send_packet( &packets[0].ecb );
 919 //---
 920 //---   for (i=0;i<50; i++)     {
 921 //---           if ( rp->rip[i].network != 0xFFFFFFFF )
 922 //---                   printf( "Network = %8x, Hops=%d, Ticks=%d\n", rp->rip[i].network, rp->rip[i].nhops, rp->rip[i].nticks );
 923 //---   }
 924 //---}
 925 //---
 926 //---