arch/dos/ipx.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 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 /*
  15  * $Source: /cvs/cvsroot/d2x/arch/dos/ipx.c,v $
  16  * $Revision: 1.3 $
  17  * $Author: bradleyb $
  18  * $Date: 2001-10-19 09:01:56 $
  19  *
  20  * Routines for IPX communications.
  21  *
  22  * $Log: not supported by cvs2svn $
  23  * Revision 1.2  2001/01/29 13:35:08  bradleyb
  24  * Fixed build system, minor fixes
  25  *
  26  * Revision 1.1.1.1  2001/01/19 03:30:15  bradleyb
  27  * Import of d2x-0.0.8
  28  *
  29  * Revision 1.1.1.1  1999/06/14 21:58:22  donut
  30  * Import of d1x 1.37 source.
  31  *
  32  * Revision 2.10  1995/03/29  17:27:55  john
  33  * Added code to not duplicate broadcasts.
  34  *
  35  * Revision 2.9  1995/03/29  15:32:07  john
  36  * NEatened.
  37  *
  38  * Revision 2.8  1995/03/29  15:07:31  john
  39  * Added network support.
  40  *
  41  * Revision 2.7  1995/03/29  11:22:27  john
  42  * Added broadcasting over a net.
  43  *
  44  * Revision 2.6  1995/03/28  20:05:03  john
  45  * Took away alternate server stuff.
  46  *
  47  * Revision 2.5  1995/03/23  19:14:29  john
  48  * Added better MAX_USERS message.
  49  *
  50  * Revision 2.4  1995/03/23  19:00:02  john
  51  * Added user list capabitly.
  52  *
  53  * Revision 2.3  1995/03/23  12:27:05  john
  54  * Move IPX into bios lib.
  55  *
  56  * Revision 2.2  1995/03/22  19:08:15  john
  57  * Added code to fix sending packets over router... now
  58  * we just need to make broadcasts go over router!!
  59  *
  60  * Revision 2.1  1995/03/21  08:40:16  john
  61  * Ifdef'd out the NETWORK code.
  62  *
  63  * Revision 2.0  1995/02/27  11:30:45  john
  64  * New version 2.0, which has no anonymous unions, builds with
  65  * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
  66  *
  67  * Revision 1.31  1995/02/16  17:35:03  john
  68  * Added code to allow dynamic socket changing.
  69  *
  70  * Revision 1.30  1995/02/01  21:03:45  john
  71  * Lintified.
  72  *
  73  * Revision 1.29  1995/01/22  14:31:05  john
  74  * Added key.h
  75  *
  76  * Revision 1.28  1995/01/22  14:29:26  john
  77  * Added code to bypass broadcast messages.
  78  *
  79  * Revision 1.27  1995/01/03  13:46:16  john
  80  * Added code that should make ipx work over different servers,
  81  * but ifdef'd it out with SHAREWARE in ipx.c.  I haven't tested
  82  * this, and I hope it doesn't introduce net bugs.
  83  *
  84  * Revision 1.26  1994/12/14  11:54:37  rob
  85  * Reduce # of ipx packets.
  86  *
  87  * Revision 1.25  1994/12/11  00:43:28  john
  88  * Locked down DOS ipx buffers... probably not necessary, tho.
  89  *
  90  * Revision 1.24  1994/12/08  15:49:58  rob
  91  * Bumped up the # of ipx packets.
  92  *
  93  * Revision 1.23  1994/12/04  15:23:54  rob
  94  * Reduced packet # constants.
  95  *
  96  * Revision 1.22  1994/11/27  23:12:39  matt
  97  * Made changes for new mprintf calling convention
  98  *
  99  * Revision 1.21  1994/11/19  15:15:19  mike
 100  * remove unused code and data
 101  *
 102  * Revision 1.20  1994/11/10  11:06:07  rob
 103  * Raised number of ipx packets to 64 and buffers to 128 (for 8-way games)
 104  * Removed (commented out) all the spx support stuff.
 105  *
 106  * Revision 1.19  1994/11/07  17:50:12  rob
 107  * Bumped up max_packets and ipx_num_packets to double their previous
 108  * values.
 109  *
 110  * Revision 1.18  1994/11/07  15:39:01  rob
 111  * Removed temporary hacked ipx_send_object function.
 112  * Replaced with a more general thing.
 113  *
 114  * Revision 1.17  1994/11/05  16:08:40  rob
 115  * Made a change necessary for object syncing on rejoin.
 116  *
 117  * Revision 1.16  1994/11/01  15:57:12  rob
 118  * Added support for SPX sockets for critical messages.
 119  *
 120  * Revision 1.15  1994/10/31  19:21:01  rob
 121  * Added a routine for sending objects via ipx.  Its a hack and shoukld
 122  * be replaced by something more general time permitting.
 123  *
 124  * Revision 1.14  1994/10/20  14:57:42  john
 125  * Some test stuff.
 126  *
 127  * Revision 1.13  1994/10/20  11:22:45  john
 128  * Tweaked the number of waiting packets. Added code to print
 129  * total packets missed, and to limit the packet send rate to
 130  * 10 packets per second unless firing.
 131  *
 132  * Revision 1.12  1994/10/03  20:50:11  john
 133  * Started adding sound pause functions.
 134  *
 135  * Revision 1.11  1994/09/15  08:54:24  mike
 136  * comment out a mprintf.
 137  *
 138  * Revision 1.10  1994/09/12  19:38:20  john
 139  * Made some stuff that prints to the DOS screen go to the
 140  * mono instead, since it really is debugging info.
 141  *
 142  * Revision 1.9  1994/09/07  13:32:03  john
 143  * Made ipx_close explicitly close the socket we were using,
 144  * because it seems that VLM's don't automatically close them
 145  * like the older NETX stuff did (Going from Novell 3.11 driver
 146  * to 3.12 anyway).
 147  *
 148  * Revision 1.8  1994/09/06  19:29:20  john
 149  * Added trial version of rejoin function.
 150  *
 151  * Revision 1.7  1994/08/09  19:31:50  john
 152  * Networking changes.
 153  *
 154  * Revision 1.6  1994/08/05  16:11:41  john
 155  * Psuedo working version of networking.
 156  *
 157  * Revision 1.5  1994/08/04  19:17:21  john
 158  * Inbetween version of network stuff.
 159  *
 160  * Revision 1.4  1994/07/29  16:08:57  john
 161  * *** empty log message ***
 162  *
 163  * Revision 1.3  1994/07/25  12:33:31  john
 164  * Network "pinging" in.
 165  *
 166  * Revision 1.2  1994/07/20  15:58:28  john
 167  * First installment of ipx stuff.
 168  *
 169  * Revision 1.1  1994/07/19  15:42:00  john
 170  * Initial revision
 171  *
 172  *
 173  */
 174
 175 #ifdef HAVE_CONFIG_H
 176 #include <conf.h>
 177 #endif
 178
 179 #ifdef RCS
 180 static char rcsid[] = "$Id: ipx.c,v 1.3 2001-10-19 09:01:56 bradleyb Exp $";
 181 #endif
 182
 183 #ifdef __GNUC__
 184 #define _BORLAND_DOS_REGS 1
 185 #define far
 186 #endif
 187
 188 #include <dos.h>
 189 #include <stdio.h>
 190 #include <string.h>
 191 #include <malloc.h>
 192 #include <stdlib.h>
 193 #include <assert.h>
 194
 195 #include "pstypes.h"
 196 #include "timer.h"
 197 #include "ipx.h"
 198 #include "error.h"
 199 #include "u_dpmi.h"
 200 #include "key.h"
 201
 202 typedef unsigned char BYTE;
 203 typedef unsigned short WORD;
 204 typedef unsigned long DWORD;
 205
 206 typedef struct local_address {
 207         ubyte address[6];
 208 } __pack__ local_address;
 209
 210 typedef struct net_address {
 211         BYTE                            network_id[4];
 212         local_address   node_id;
 213         WORD                            socket_id;
 214 } __pack__ net_address;
 215
 216 typedef struct ipx_header {
 217         WORD                    checksum;
 218         WORD                    length;
 219         BYTE                    transport_control;
 220         BYTE                    packet_type;
 221         net_address     destination;
 222         net_address     source;
 223 } __pack__ ipx_header;
 224
 225 typedef struct ecb_header {
 226         WORD                    link[2];
 227         WORD                    esr_address[2];
 228         BYTE                    in_use;
 229         BYTE                    completion_code;
 230         WORD                    socket_id;
 231         BYTE                    ipx_reserved[14];
 232         WORD                    connection_id;
 233         local_address immediate_address;
 234         WORD                    fragment_count;
 235         WORD                    fragment_pointer[2];
 236         WORD                    fragment_size;
 237 } __pack__ ecb_header;
 238
 239 typedef struct packet_data {
 240         int                     packetnum;
 241         byte                    data[IPX_MAX_DATA_SIZE];
 242 } __pack__ packet_data;
 243
 244 typedef struct ipx_packet {
 245         ecb_header      ecb;
 246         ipx_header      ipx;
 247         packet_data     pd;
 248 } __pack__ ipx_packet;
 249
 250 typedef struct user_address {
 251         ubyte network[4];
 252         ubyte node[6];
 253         ubyte address[6];
 254 } __pack__ user_address;
 255
 256 #define MAX_USERS 64
 257 int Ipx_num_users = 0;
 258 user_address Ipx_users[MAX_USERS];
 259
 260 #define MAX_NETWORKS 64
 261 int Ipx_num_networks = 0;
 262 uint Ipx_networks[MAX_NETWORKS];
 263
 264 int ipx_packetnum = 0;
 265
 266 #define MAX_PACKETS 64
 267
 268 static packet_data packet_buffers[MAX_PACKETS];
 269 static short packet_free_list[MAX_PACKETS];
 270 static int num_packets = 0;
 271 static int largest_packet_index = 0;
 272 static short packet_size[MAX_PACKETS];
 273
 274 WORD ipx_socket=0;
 275 ubyte ipx_installed=0;
 276 WORD ipx_vector_segment;
 277 WORD ipx_vector_offset;
 278 ubyte ipx_socket_life = 0;      // 0=closed at prog termination, 0xff=closed when requested.
 279 DWORD ipx_network = 0;
 280 local_address ipx_my_node;
 281 WORD ipx_num_packets=32;                // 32 Ipx packets
 282 ipx_packet * packets;
 283 int neterrors = 0;
 284 ushort ipx_packets_selector;
 285
 286 ecb_header * last_ecb=NULL;
 287 int lastlen=0;
 288
 289 void got_new_packet( ecb_header * ecb );
 290 void ipx_listen_for_packet(ecb_header * ecb );
 291
 292 void free_packet( int id )
 293 {
 294         packet_buffers[id].packetnum = -1;
 295         packet_free_list[ --num_packets ] = id;
 296         if (largest_packet_index==id)
 297                 while ((--largest_packet_index>0) && (packet_buffers[largest_packet_index].packetnum == -1 ));
 298 }
 299
 300 int ipx_get_packet_data( ubyte * data )
 301 {
 302         int i, n, best, best_id, size;
 303
 304         for (i=1; i<ipx_num_packets; i++ )      {
 305                 if ( !packets[i].ecb.in_use )   {
 306                         got_new_packet( &packets[i].ecb );
 307                         packets[i].ecb.in_use = 0;
 308                         ipx_listen_for_packet(&packets[i].ecb);
 309                 }
 310         }
 311
 312         best = -1;
 313         n = 0;
 314         best_id = -1;
 315
 316         for (i=0; i<=largest_packet_index; i++ )        {
 317                 if ( packet_buffers[i].packetnum > -1 ) {
 318                         n++;
 319                         if ( best == -1 || (packet_buffers[i].packetnum<best) ) {
 320                                 best = packet_buffers[i].packetnum;
 321                                 best_id = i;
 322                         }
 323                 }
 324         }
 325
 326         //mprintf( (0, "Best id = %d, pn = %d, last_ecb = %x, len=%x, ne = %d\n", best_id, best, last_ecb, lastlen, neterrors ));
 327         //mprintf( (1, "<%d> ", neterrors ));
 328
 329         if ( best_id < 0 ) return 0;
 330
 331         size = packet_size[best_id];
 332         memcpy( data, packet_buffers[best_id].data, size );
 333         free_packet(best_id);
 334
 335         return size;
 336 }
 337
 338 #ifndef __GNUC__
 339 unsigned int swap_short( unsigned int short )
 340 #pragma aux swap_short parm [eax] = "xchg al,ah";
 341 #else
 342 static inline unsigned int swap_short( unsigned int sshort ) {
 343         int __retval;
 344         asm("xchg %%ah,%%al" : "=a" (__retval) : "a" (sshort));
 345         return __retval;
 346 }
 347 #endif
 348
 349 void got_new_packet( ecb_header * ecb )
 350 {
 351         ipx_packet * p;
 352         int id;
 353         unsigned short datasize;
 354
 355         datasize = 0;
 356         last_ecb = ecb;
 357         p = (ipx_packet *)ecb;
 358
 359         if ( p->ecb.in_use ) { neterrors++; return; }
 360         if      ( p->ecb.completion_code )      { neterrors++; return; }
 361
 362         //      Error( "Recieve error %d for completion code", p->ecb.completion_code );
 363
 364         if ( memcmp( &p->ipx.source.node_id, &ipx_my_node, 6 ) )        {
 365                 datasize=swap_short(p->ipx.length);
 366                 lastlen=datasize;
 367                 datasize -= sizeof(ipx_header);
 368                 // Find slot to put packet in...
 369                 if ( datasize > 0 && datasize <= sizeof(packet_data) )  {
 370                         if ( num_packets >= MAX_PACKETS ) {
 371                                 //printf( 1, "IPX: Packet buffer overrun!!!\n" );
 372                                 neterrors++;
 373                                 return;
 374                         }
 375                         id = packet_free_list[ num_packets++ ];
 376                         if (id > largest_packet_index ) largest_packet_index = id;
 377                         packet_size[id] = datasize-sizeof(int);
 378                         packet_buffers[id].packetnum =  p->pd.packetnum;
 379                         if ( packet_buffers[id].packetnum < 0 ) { neterrors++; return; }
 380                         memcpy( packet_buffers[id].data, p->pd.data, packet_size[id] );
 381                 } else {
 382                         neterrors++; return;
 383                 }
 384         }
 385         // Repost the ecb
 386         p->ecb.in_use = 0;
 387         //ipx_listen_for_packet(&p->ecb);
 388 }
 389
 390 ubyte * ipx_get_my_local_address()
 391 {
 392         return ipx_my_node.address;
 393 }
 394
 395 ubyte * ipx_get_my_server_address()
 396 {
 397         return (ubyte *)&ipx_network;
 398 }
 399
 400 void ipx_listen_for_packet(ecb_header * ecb )
 401 {
 402         dpmi_real_regs rregs;
 403         ecb->in_use = 0x1d;
 404         memset(&rregs,0,sizeof(dpmi_real_regs));
 405         rregs.ebx = 4;  // Listen For Packet function
 406         rregs.esi = DPMI_real_offset(ecb);
 407         rregs.es = DPMI_real_segment(ecb);
 408         dpmi_real_int386x( 0x7A, &rregs );
 409 }
 410
 411 void ipx_cancel_listen_for_packet(ecb_header * ecb )
 412 {
 413         dpmi_real_regs rregs;
 414         memset(&rregs,0,sizeof(dpmi_real_regs));
 415         rregs.ebx = 6;  // IPX Cancel event
 416         rregs.esi = DPMI_real_offset(ecb);
 417         rregs.es = DPMI_real_segment(ecb);
 418         dpmi_real_int386x( 0x7A, &rregs );
 419 }
 420
 421
 422 void ipx_send_packet(ecb_header * ecb )
 423 {
 424         dpmi_real_regs rregs;
 425         memset(&rregs,0,sizeof(dpmi_real_regs));
 426         rregs.ebx = 3;  // Send Packet function
 427         rregs.esi = DPMI_real_offset(ecb);
 428         rregs.es = DPMI_real_segment(ecb);
 429         dpmi_real_int386x( 0x7A, &rregs );
 430 }
 431
 432 typedef struct {
 433         ubyte   network[4];
 434         ubyte           node[6];
 435         ubyte           local_target[6];
 436 } __pack__ net_xlat_info;
 437
 438 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 439 {
 440         net_xlat_info * info;
 441         dpmi_real_regs rregs;
 442
 443         // Get dos memory for call...
 444         info = (net_xlat_info *)dpmi_get_temp_low_buffer( sizeof(net_xlat_info) );
 445         assert( info != NULL );
 446         memcpy( info->network, server, 4 );
 447         memcpy( info->node, node, 6 );
 448
 449         memset(&rregs,0,sizeof(dpmi_real_regs));
 450
 451         rregs.ebx = 2;          // Get Local Target
 452         rregs.es = DPMI_real_segment(info);
 453         rregs.esi = DPMI_real_offset(info->network);
 454         rregs.edi = DPMI_real_offset(info->local_target);
 455
 456         dpmi_real_int386x( 0x7A, &rregs );
 457
 458         // Save the local target...
 459         memcpy( local_target, info->local_target, 6 );
 460 }
 461
 462 void ipx_close()
 463 {
 464         dpmi_real_regs rregs;
 465         if ( ipx_installed )    {
 466                 // When using VLM's instead of NETX, the sockets don't
 467                 // seem to automatically get closed, so we must explicitly
 468                 // close them at program termination.
 469                 ipx_installed = 0;
 470                 memset(&rregs,0,sizeof(dpmi_real_regs));
 471                 rregs.edx = ipx_socket;
 472                 rregs.ebx = 1;  // Close socket
 473                 dpmi_real_int386x( 0x7A, &rregs );
 474         }
 475 }
 476
 477
 478 //---------------------------------------------------------------
 479 // Initializes all IPX internals.
 480 // If socket_number==0, then opens next available socket.
 481 // Returns:     0  if successful.
 482 //                              -1 if socket already open.
 483 //                              -2      if socket table full.
 484 //                              -3 if IPX not installed.
 485 //                              -4 if couldn't allocate low dos memory
 486 //                              -5 if error with getting internetwork address
 487
 488 int ipx_init( int socket_number, int show_address )
 489 {
 490         dpmi_real_regs rregs;
 491         ubyte *ipx_real_buffer;
 492         int i;
 493
 494         atexit(ipx_close);
 495
 496         ipx_packetnum = 0;
 497
 498         // init packet buffers.
 499         for (i=0; i<MAX_PACKETS; i++ )  {
 500                 packet_buffers[i].packetnum = -1;
 501                 packet_free_list[i] = i;
 502         }
 503         num_packets = 0;
 504         largest_packet_index = 0;
 505
 506         // Get the IPX vector
 507         memset(&rregs,0,sizeof(dpmi_real_regs));
 508         rregs.eax=0x00007a00;
 509         dpmi_real_int386x( 0x2f, &rregs );
 510
 511         if ( (rregs.eax & 0xFF) != 0xFF )       {
 512                 return 3;
 513         }
 514         ipx_vector_offset = rregs.edi & 0xFFFF;
 515         ipx_vector_segment = rregs.es;
 516         //printf( "IPX entry point at %.4x:%.4x\n", ipx_vector_segment, ipx_vector_offset );
 517
 518         // Open a socket for IPX
 519
 520         memset(&rregs,0,sizeof(dpmi_real_regs));
 521         swab( (char *)&socket_number,(char *)&ipx_socket, 2 );
 522         rregs.edx = ipx_socket;
 523         rregs.eax = ipx_socket_life;
 524         rregs.ebx = 0;  // Open socket
 525         dpmi_real_int386x( 0x7A, &rregs );
 526
 527         ipx_socket = rregs.edx & 0xFFFF;
 528
 529         if ( rregs.eax & 0xFF ) {
 530                 //mprintf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 531                 return -2;
 532         }
 533
 534         ipx_installed = 1;
 535
 536         // Find our internetwork address
 537         ipx_real_buffer = dpmi_get_temp_low_buffer( 1024 );     // 1k block
 538         if ( ipx_real_buffer == NULL )  {
 539                 //printf( "Error allocation realmode memory\n" );
 540                 return -4;
 541         }
 542
 543         memset(&rregs,0,sizeof(dpmi_real_regs));
 544         rregs.ebx = 9;          // Get internetwork address
 545         rregs.esi = DPMI_real_offset(ipx_real_buffer);
 546         rregs.es = DPMI_real_segment(ipx_real_buffer);
 547         dpmi_real_int386x( 0x7A, &rregs );
 548
 549         if ( rregs.eax & 0xFF ) {
 550                 //printf( "Error getting internetwork address!\n" );
 551                 return -2;
 552         }
 553
 554         memcpy( &ipx_network, ipx_real_buffer, 4 );
 555         memcpy( &ipx_my_node, &ipx_real_buffer[4], 6 );
 556
 557         Ipx_num_networks = 0;
 558         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 559
 560         if ( show_address )     {
 561                 printf( "My IPX addresss is " );
 562                 printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 563                 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] );
 564                 printf( "\n" );
 565         }
 566
 567         packets = dpmi_real_malloc( sizeof(ipx_packet)*ipx_num_packets, &ipx_packets_selector );
 568         if ( packets == NULL )  {
 569                 //printf( "Couldn't allocate real memory for %d packets\n", ipx_num_packets );
 570                 return -4;
 571         }
 572 #if 0 /* adb: not needed, fails with cwsdpmi */
 573         if (!dpmi_lock_region( packets, sizeof(ipx_packet)*ipx_num_packets ))   {
 574                 //printf( "Couldn't lock real memory for %d packets\n", ipx_num_packets );
 575                 return -4;
 576         }
 577 #endif
 578         memset( packets, 0, sizeof(ipx_packet)*ipx_num_packets );
 579
 580         for (i=1; i<ipx_num_packets; i++ )      {
 581                 packets[i].ecb.in_use = 0x1d;
 582                 //packets[i].ecb.in_use = 0;
 583                 packets[i].ecb.socket_id = ipx_socket;
 584                 packets[i].ecb.fragment_count = 1;
 585                 packets[i].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[i].ipx);
 586                 packets[i].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[i].ipx);
 587                 packets[i].ecb.fragment_size = sizeof(ipx_packet)-sizeof(ecb_header);                   //-sizeof(ecb_header);
 588
 589                 ipx_listen_for_packet(&packets[i].ecb);
 590         }
 591
 592         packets[0].ecb.socket_id = ipx_socket;
 593         packets[0].ecb.fragment_count = 1;
 594         packets[0].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[0].ipx);
 595         packets[0].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[0].ipx);
 596         packets[0].ipx.packet_type = 4;         // IPX packet
 597         packets[0].ipx.destination.socket_id = ipx_socket;
 598 //      memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 599         memset( packets[0].ipx.destination.network_id, 0, 4 );
 600
 601         return 0;
 602 }
 603
 604 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 605 {
 606         assert(ipx_installed);
 607
 608         if ( datasize >= IPX_MAX_DATA_SIZE )    {
 609                 printf( "Data too big\n" );
 610 //added/replaced on 11/8/98 by Victor Rachels to stop crappage
 611                 return;
 612 //                exit(1);
 613 //end this section replacement - VR
 614         }
 615
 616         // Make sure no one is already sending something
 617         while( packets[0].ecb.in_use )
 618         {
 619         }
 620
 621         if (packets[0].ecb.completion_code)     {
 622 //                printf( "Send error %d for completion code\n", packets[0].ecb.completion_code );
 623 //added/replaced on 11/8/98 by Victor Rachels to stop crappage
 624                 return;
 625         //        exit(1);
 626 //end this section replacement - VR
 627
 628         }
 629
 630         // Fill in destination address
 631         if ( memcmp( network, &ipx_network, 4 ) )
 632                 memcpy( packets[0].ipx.destination.network_id, network, 4 );
 633         else
 634                 memset( packets[0].ipx.destination.network_id, 0, 4 );
 635         memcpy( packets[0].ipx.destination.node_id.address, address, 6 );
 636         memcpy( packets[0].ecb.immediate_address.address, immediate_address, 6 );
 637         packets[0].pd.packetnum = ipx_packetnum++;
 638
 639         // Fill in data to send
 640         packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(int) + datasize;
 641
 642         assert( datasize > 1 );
 643         assert( packets[0].ecb.fragment_size <= 576 );
 644
 645         memcpy( packets[0].pd.data, data, datasize );
 646
 647         // Send it
 648         ipx_send_packet( &packets[0].ecb );
 649
 650 }
 651
 652 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 653 {
 654         int i, j;
 655         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 656         ubyte local_address[6];
 657
 658         // Set to all networks besides mine
 659         for (i=0; i<Ipx_num_networks; i++ )     {
 660                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 661                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 662                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 663                 } else {
 664                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 665                 }
 666         }
 667
 668         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 669
 670         // Send directly to all users not on my network or in the network list.
 671         for (i=0; i<Ipx_num_users; i++ )        {
 672                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 673                         for (j=0; j<Ipx_num_networks; j++ )             {
 674                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 675                                         goto SkipUser;
 676                         }
 677                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 678 SkipUser:
 679                         j = 0;
 680                 }
 681         }
 682 }
 683
 684 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 685 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 686 {
 687         ubyte local_address[6];
 688
 689         if ( (*(uint *)server) != 0 )   {
 690                 ipx_get_local_target( server, address, local_address );
 691                 ipx_send_packet_data( data, datasize, server, address, local_address );
 692         } else {
 693                 // Old method, no server info.
 694                 ipx_send_packet_data( data, datasize, server, address, address );
 695         }
 696 }
 697
 698 int ipx_change_default_socket( ushort socket_number )
 699 {
 700         int i;
 701         WORD new_ipx_socket;
 702         dpmi_real_regs rregs;
 703
 704         if ( !ipx_installed ) return -3;
 705
 706         // Open a new socket
 707         memset(&rregs,0,sizeof(dpmi_real_regs));
 708         swab( (char *)&socket_number,(char *)&new_ipx_socket, 2 );
 709         rregs.edx = new_ipx_socket;
 710         rregs.eax = ipx_socket_life;
 711         rregs.ebx = 0;  // Open socket
 712         dpmi_real_int386x( 0x7A, &rregs );
 713
 714         new_ipx_socket = rregs.edx & 0xFFFF;
 715
 716         if ( rregs.eax & 0xFF ) {
 717                 //printf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 718                 return -2;
 719         }
 720
 721         for (i=1; i<ipx_num_packets; i++ )      {
 722                 ipx_cancel_listen_for_packet(&packets[i].ecb);
 723         }
 724
 725         // Close existing socket...
 726         memset(&rregs,0,sizeof(dpmi_real_regs));
 727         rregs.edx = ipx_socket;
 728         rregs.ebx = 1;  // Close socket
 729         dpmi_real_int386x( 0x7A, &rregs );
 730
 731         ipx_socket = new_ipx_socket;
 732
 733         // Repost all listen requests on the new socket...
 734         for (i=1; i<ipx_num_packets; i++ )      {
 735                 packets[i].ecb.in_use = 0;
 736                 packets[i].ecb.socket_id = ipx_socket;
 737                 ipx_listen_for_packet(&packets[i].ecb);
 738         }
 739
 740         packets[0].ecb.socket_id = ipx_socket;
 741         packets[0].ipx.destination.socket_id = ipx_socket;
 742
 743         ipx_packetnum = 0;
 744         // init packet buffers.
 745         for (i=0; i<MAX_PACKETS; i++ )  {
 746                 packet_buffers[i].packetnum = -1;
 747                 packet_free_list[i] = i;
 748         }
 749         num_packets = 0;
 750         largest_packet_index = 0;
 751
 752         return 0;
 753 }
 754
 755 void ipx_read_user_file(char * filename)
 756 {
 757         FILE * fp;
 758         user_address tmp;
 759         char temp_line[132], *p1;
 760         int n, ln=0;
 761
 762         if (!filename) return;
 763
 764         Ipx_num_users = 0;
 765
 766         fp = fopen( filename, "rt" );
 767         if ( !fp ) return;
 768
 769         printf( "Broadcast Users:\n" );
 770
 771         while (fgets(temp_line, 132, fp)) {
 772                 ln++;
 773                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 774                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 775                 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] );
 776                 if ( n != 10 ) continue;
 777                 if ( Ipx_num_users < MAX_USERS )        {
 778                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 779                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 780                         Ipx_users[Ipx_num_users++] = tmp;
 781                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 782                         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] );
 783                 } else {
 784                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 785                         fclose(fp);
 786                         return;
 787                 }
 788         }
 789         fclose(fp);
 790 }
 791
 792
 793 void ipx_read_network_file(char * filename)
 794 {
 795         FILE * fp;
 796         user_address tmp;
 797         char temp_line[132], *p1;
 798         int i, n, ln=0;
 799
 800         if (!filename) return;
 801
 802         fp = fopen( filename, "rt" );
 803         if ( !fp ) return;
 804
 805         printf( "Using Networks:\n" );
 806         for (i=0; i<Ipx_num_networks; i++ )             {
 807                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 808                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 809         }
 810
 811         while (fgets(temp_line, 132, fp)) {
 812                 ln++;
 813                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 814                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 815                 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] );
 816                 if ( n != 4 ) continue;
 817                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 818                         int j;
 819                         for (j=0; j<Ipx_num_networks; j++ )
 820                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 821                                         break;
 822                         if ( j >= Ipx_num_networks )    {
 823                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 824                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 825                         }
 826                 } else {
 827                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 828                         fclose(fp);
 829                         return;
 830                 }
 831         }
 832         fclose(fp);
 833
 834 }
 835
 836 //---typedef struct rip_entry {
 837 //---   uint            network;
 838 //---   ushort  nhops;
 839 //---   ushort  nticks;
 840 //---} rip_entry;
 841 //---
 842 //---typedef struct rip_packet {
 843 //---   ushort          operation;              //1=request, 2=response
 844 //---   rip_entry       rip[50];
 845 //---} rip_packet;
 846 //---
 847 //---
 848 //---void  ipx_find_all_servers()
 849 //---{
 850 //---   int i;
 851 //---   rip_packet * rp;
 852 //---   assert(ipx_installed);
 853 //---
 854 //---   ipx_change_default_socket( 0x0453 );
 855 //---   //      ipx_change_default_socket( 0x5304 );
 856 //---
 857 //---   // Make sure no one is already sending something
 858 //---   while( packets[0].ecb.in_use )
 859 //---   {
 860 //---   }
 861 //---
 862 //---   if (packets[0].ecb.completion_code)     {
 863 //---           printf( "AAAA:Send error %d for completion code\n", packets[0].ecb.completion_code );
 864 //---           //exit(1);
 865 //---   }
 866 //---
 867 //---   rp = (rip_packet *)&packets[0].pd;
 868 //---
 869 //---   // Fill in destination address
 870 //---   {
 871 //---           char mzero1[] = {0,0,0,1};
 872 //---           char mzero[] = {0,0,0,0,0,1};
 873 //---           char immediate[6];
 874 //---           //memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 875 //---           //memcpy( packets[0].ipx.destination.node_id.address, ipx_my_node.address, 6 );
 876 //---
 877 //---           memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 878 //---           memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 879 //---
 880 //---           memcpy( packets[0].ipx.destination.socket_id, &ipx_socket, 2 );
 881 //---           memcpy( packets[0].ipx.source.network_id, &ipx_network, 4 );
 882 //---           memcpy( packets[0].ipx.source.node_id.address, ipx_my_node.address, 6 );
 883 //---           memcpy( packets[0].ipx.source.socket_id, &ipx_socket, 2 );
 884 //---           //memcpy( packets[0].ecb.immediate_address.address, ipx_my_node.address, 6 );
 885 //---           //mzero1[3] = 1;
 886 //---           //memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 887 //---           //mzero[5] = 1;
 888 //---           //memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 889 //---           //ipx_get_local_target( mzero1, mzero, immediate );
 890 //---           //memcpy( packets[0].ecb.immediate_address.address, mzero, 6 );
 891 //---           //memcpy( packets[0].ecb.immediate_address.address, immediate, 6 );
 892 //---           //mzero[5] = 0;
 893 //---   }
 894 //---
 895 //---   packets[0].ipx.packet_type = 1;         // RIP packet
 896 //---
 897 //---   // Fill in data to send
 898 //---   packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(rip_packet);
 899 //---   assert( packets[0].ecb.fragment_size <= 576 );
 900 //---
 901 //---   rp->operation = 0;              // Request
 902 //---   for (i=0;i<50; i++)     {
 903 //---           rp->rip[i].network = 0xFFFFFFFF;
 904 //---           rp->rip[i].nhops = 0;
 905 //---           rp->rip[i].nticks = 0;
 906 //---   }
 907 //---
 908 //---   // Send it
 909 //---   ipx_send_packet( &packets[0].ecb );
 910 //---
 911 //---   for (i=0;i<50; i++)     {
 912 //---           if ( rp->rip[i].network != 0xFFFFFFFF )
 913 //---                   printf( "Network = %8x, Hops=%d, Ticks=%d\n", rp->rip[i].network, rp->rip[i].nhops, rp->rip[i].nticks );
 914 //---   }
 915 //---}
 916 //---
 917 //---