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: 1.4 $
  17  * $Author: bradleyb $
  18  * $Date: 2001-10-19 10:46:06 $
  19  *
  20  * Routines for IPX communications.
  21  *
  22  * $Log: not supported by cvs2svn $
  23  * Revision 1.2  2000/02/07 10:26:05  donut
  24  * new ipx code structure reduces some redundancy and gives all arches multi netcode ability
  25  *
  26  * Revision 1.1.1.1  1999/06/14 21:58:22  donut
  27  * Import of d1x 1.37 source.
  28  *
  29  * Revision 2.10  1995/03/29  17:27:55  john
  30  * Added code to not duplicate broadcasts.
  31  *
  32  * Revision 2.9  1995/03/29  15:32:07  john
  33  * NEatened.
  34  *
  35  * Revision 2.8  1995/03/29  15:07:31  john
  36  * Added network support.
  37  *
  38  * Revision 2.7  1995/03/29  11:22:27  john
  39  * Added broadcasting over a net.
  40  *
  41  * Revision 2.6  1995/03/28  20:05:03  john
  42  * Took away alternate server stuff.
  43  *
  44  * Revision 2.5  1995/03/23  19:14:29  john
  45  * Added better MAX_USERS message.
  46  *
  47  * Revision 2.4  1995/03/23  19:00:02  john
  48  * Added user list capabitly.
  49  *
  50  * Revision 2.3  1995/03/23  12:27:05  john
  51  * Move IPX into bios lib.
  52  *
  53  * Revision 2.2  1995/03/22  19:08:15  john
  54  * Added code to fix sending packets over router... now
  55  * we just need to make broadcasts go over router!!
  56  *
  57  * Revision 2.1  1995/03/21  08:40:16  john
  58  * Ifdef'd out the NETWORK code.
  59  *
  60  * Revision 2.0  1995/02/27  11:30:45  john
  61  * New version 2.0, which has no anonymous unions, builds with
  62  * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
  63  *
  64  * Revision 1.31  1995/02/16  17:35:03  john
  65  * Added code to allow dynamic socket changing.
  66  *
  67  * Revision 1.30  1995/02/01  21:03:45  john
  68  * Lintified.
  69  *
  70  * Revision 1.29  1995/01/22  14:31:05  john
  71  * Added key.h
  72  *
  73  * Revision 1.28  1995/01/22  14:29:26  john
  74  * Added code to bypass broadcast messages.
  75  *
  76  * Revision 1.27  1995/01/03  13:46:16  john
  77  * Added code that should make ipx work over different servers,
  78  * but ifdef'd it out with SHAREWARE in ipx.c.  I haven't tested
  79  * this, and I hope it doesn't introduce net bugs.
  80  *
  81  * Revision 1.26  1994/12/14  11:54:37  rob
  82  * Reduce # of ipx packets.
  83  *
  84  * Revision 1.25  1994/12/11  00:43:28  john
  85  * Locked down DOS ipx buffers... probably not necessary, tho.
  86  *
  87  * Revision 1.24  1994/12/08  15:49:58  rob
  88  * Bumped up the # of ipx packets.
  89  *
  90  * Revision 1.23  1994/12/04  15:23:54  rob
  91  * Reduced packet # constants.
  92  *
  93  * Revision 1.22  1994/11/27  23:12:39  matt
  94  * Made changes for new mprintf calling convention
  95  *
  96  * Revision 1.21  1994/11/19  15:15:19  mike
  97  * remove unused code and data
  98  *
  99  * Revision 1.20  1994/11/10  11:06:07  rob
 100  * Raised number of ipx packets to 64 and buffers to 128 (for 8-way games)
 101  * Removed (commented out) all the spx support stuff.
 102  *
 103  * Revision 1.19  1994/11/07  17:50:12  rob
 104  * Bumped up max_packets and ipx_num_packets to double their previous
 105  * values.
 106  *
 107  * Revision 1.18  1994/11/07  15:39:01  rob
 108  * Removed temporary hacked ipx_send_object function.
 109  * Replaced with a more general thing.
 110  *
 111  * Revision 1.17  1994/11/05  16:08:40  rob
 112  * Made a change necessary for object syncing on rejoin.
 113  *
 114  * Revision 1.16  1994/11/01  15:57:12  rob
 115  * Added support for SPX sockets for critical messages.
 116  *
 117  * Revision 1.15  1994/10/31  19:21:01  rob
 118  * Added a routine for sending objects via ipx.  Its a hack and shoukld
 119  * be replaced by something more general time permitting.
 120  *
 121  * Revision 1.14  1994/10/20  14:57:42  john
 122  * Some test stuff.
 123  *
 124  * Revision 1.13  1994/10/20  11:22:45  john
 125  * Tweaked the number of waiting packets. Added code to print
 126  * total packets missed, and to limit the packet send rate to
 127  * 10 packets per second unless firing.
 128  *
 129  * Revision 1.12  1994/10/03  20:50:11  john
 130  * Started adding sound pause functions.
 131  *
 132  * Revision 1.11  1994/09/15  08:54:24  mike
 133  * comment out a mprintf.
 134  *
 135  * Revision 1.10  1994/09/12  19:38:20  john
 136  * Made some stuff that prints to the DOS screen go to the
 137  * mono instead, since it really is debugging info.
 138  *
 139  * Revision 1.9  1994/09/07  13:32:03  john
 140  * Made ipx_close explicitly close the socket we were using,
 141  * because it seems that VLM's don't automatically close them
 142  * like the older NETX stuff did (Going from Novell 3.11 driver
 143  * to 3.12 anyway).
 144  *
 145  * Revision 1.8  1994/09/06  19:29:20  john
 146  * Added trial version of rejoin function.
 147  *
 148  * Revision 1.7  1994/08/09  19:31:50  john
 149  * Networking changes.
 150  *
 151  * Revision 1.6  1994/08/05  16:11:41  john
 152  * Psuedo working version of networking.
 153  *
 154  * Revision 1.5  1994/08/04  19:17:21  john
 155  * Inbetween version of network stuff.
 156  *
 157  * Revision 1.4  1994/07/29  16:08:57  john
 158  * *** empty log message ***
 159  *
 160  * Revision 1.3  1994/07/25  12:33:31  john
 161  * Network "pinging" in.
 162  *
 163  * Revision 1.2  1994/07/20  15:58:28  john
 164  * First installment of ipx stuff.
 165  *
 166  * Revision 1.1  1994/07/19  15:42:00  john
 167  * Initial revision
 168  *
 169  *
 170  */
 171
 172 #ifdef HAVE_CONFIG_H
 173 #include <conf.h>
 174 #endif
 175
 176 #ifdef __GNUC__
 177 #define _BORLAND_DOS_REGS 1
 178 #define far
 179 #endif
 180
 181 #include <i86.h>
 182 #include <dos.h>
 183 #include <stdio.h>
 184 #include <string.h>
 185 #include <malloc.h>
 186 #include <stdlib.h>
 187 #include <conio.h>
 188 #include <assert.h>
 189
 190 #include "pstypes.h"
 191 #include "timer.h"
 192 #include "ipx.h"
 193 #include "error.h"
 194 #include "u_dpmi.h"
 195 #include "key.h"
 196 #include "ipx_drv.h"
 197
 198 typedef unsigned char BYTE;
 199 typedef unsigned short WORD;
 200 typedef unsigned long DWORD;
 201
 202 typedef struct local_address {
 203         ubyte address[6];
 204 } __pack__ local_address;
 205
 206 typedef struct net_address {
 207         BYTE                            network_id[4];
 208         local_address   node_id;
 209         WORD                            socket_id;
 210 } __pack__ net_address;
 211
 212 typedef struct ipx_header {
 213         WORD                    checksum;
 214         WORD                    length;
 215         BYTE                    transport_control;
 216         BYTE                    packet_type;
 217         net_address     destination;
 218         net_address     source;
 219 } __pack__ ipx_header;
 220
 221 typedef struct ecb_header {
 222         WORD                    link[2];
 223         WORD                    esr_address[2];
 224         BYTE                    in_use;
 225         BYTE                    completion_code;
 226         WORD                    socket_id;
 227         BYTE                    ipx_reserved[14];
 228         WORD                    connection_id;
 229         local_address immediate_address;
 230         WORD                    fragment_count;
 231         WORD                    fragment_pointer[2];
 232         WORD                    fragment_size;
 233 } __pack__ ecb_header;
 234
 235 typedef struct packet_data {
 236         int                     packetnum;
 237         byte                    data[IPX_MAX_DATA_SIZE];
 238 } __pack__ packet_data;
 239
 240 typedef struct ipx_packet {
 241         ecb_header      ecb;
 242         ipx_header      ipx;
 243         packet_data     pd;
 244 } __pack__ ipx_packet;
 245
 246 static int ipx_packetnum = 0;
 247
 248 #define MAX_PACKETS 64
 249
 250 static packet_data packet_buffers[MAX_PACKETS];
 251 static short packet_free_list[MAX_PACKETS];
 252 static int num_packets = 0;
 253 static int largest_packet_index = 0;
 254 static short packet_size[MAX_PACKETS];
 255
 256 WORD ipx_socket=0;
 257 static ubyte ipx_installed=0;
 258 WORD ipx_vector_segment;
 259 WORD ipx_vector_offset;
 260 ubyte ipx_socket_life = 0;      // 0=closed at prog termination, 0xff=closed when requested.
 261 //DWORD ipx_network = 0;
 262 //local_address ipx_my_node;
 263 #define ipx_my_node (ipx_MyAddress+4)
 264 WORD ipx_num_packets=32;                // 32 Ipx packets
 265 ipx_packet * packets;
 266 int neterrors = 0;
 267 ushort ipx_packets_selector;
 268
 269 ecb_header * last_ecb=NULL;
 270 int lastlen=0;
 271
 272 static void got_new_packet( ecb_header * ecb );
 273 static void ipx_listen_for_packet(ecb_header * ecb );
 274
 275 static void free_packet( int id )
 276 {
 277         packet_buffers[id].packetnum = -1;
 278         packet_free_list[ --num_packets ] = id;
 279         if (largest_packet_index==id)
 280                 while ((--largest_packet_index>0) && (packet_buffers[largest_packet_index].packetnum == -1 ));
 281 }
 282
 283 static int ipx_dos_get_packet_data( ubyte * data )
 284 {
 285         int i, n, best, best_id, size;
 286
 287         for (i=1; i<ipx_num_packets; i++ )      {
 288                 if ( !packets[i].ecb.in_use )   {
 289                         got_new_packet( &packets[i].ecb );
 290                         packets[i].ecb.in_use = 0;
 291                         ipx_listen_for_packet(&packets[i].ecb);
 292                 }
 293         }
 294
 295         best = -1;
 296         n = 0;
 297         best_id = -1;
 298
 299         for (i=0; i<=largest_packet_index; i++ )        {
 300                 if ( packet_buffers[i].packetnum > -1 ) {
 301                         n++;
 302                         if ( best == -1 || (packet_buffers[i].packetnum<best) ) {
 303                                 best = packet_buffers[i].packetnum;
 304                                 best_id = i;
 305                         }
 306                 }
 307         }
 308
 309         //mprintf( (0, "Best id = %d, pn = %d, last_ecb = %x, len=%x, ne = %d\n", best_id, best, last_ecb, lastlen, neterrors ));
 310         //mprintf( (1, "<%d> ", neterrors ));
 311
 312         if ( best_id < 0 ) return 0;
 313
 314         size = packet_size[best_id];
 315         memcpy( data, packet_buffers[best_id].data, size );
 316         free_packet(best_id);
 317
 318         return size;
 319 }
 320
 321 #ifndef __GNUC__
 322 unsigned int swap_short( unsigned int short )
 323 #pragma aux swap_short parm [eax] = "xchg al,ah";
 324 #else
 325 static inline unsigned int swap_short( unsigned int sshort ) {
 326         int __retval;
 327         asm("xchg %%ah,%%al" : "=a" (__retval) : "a" (sshort));
 328         return __retval;
 329 }
 330 #endif
 331
 332 static void got_new_packet( ecb_header * ecb )
 333 {
 334         ipx_packet * p;
 335         int id;
 336         unsigned short datasize;
 337
 338         datasize = 0;
 339         last_ecb = ecb;
 340         p = (ipx_packet *)ecb;
 341
 342         if ( p->ecb.in_use ) { neterrors++; return; }
 343         if      ( p->ecb.completion_code )      { neterrors++; return; }
 344
 345         //      Error( "Recieve error %d for completion code", p->ecb.completion_code );
 346
 347         if ( memcmp( &p->ipx.source.node_id, ipx_my_node, 6 ) ) {
 348                 datasize=swap_short(p->ipx.length);
 349                 lastlen=datasize;
 350                 datasize -= sizeof(ipx_header);
 351                 // Find slot to put packet in...
 352                 if ( datasize > 0 && datasize <= sizeof(packet_data) )  {
 353                         if ( num_packets >= MAX_PACKETS ) {
 354                                 //printf( 1, "IPX: Packet buffer overrun!!!\n" );
 355                                 neterrors++;
 356                                 return;
 357                         }
 358                         id = packet_free_list[ num_packets++ ];
 359                         if (id > largest_packet_index ) largest_packet_index = id;
 360                         packet_size[id] = datasize-sizeof(int);
 361                         packet_buffers[id].packetnum =  p->pd.packetnum;
 362                         if ( packet_buffers[id].packetnum < 0 ) { neterrors++; return; }
 363                         memcpy( packet_buffers[id].data, p->pd.data, packet_size[id] );
 364                 } else {
 365                         neterrors++; return;
 366                 }
 367         }
 368         // Repost the ecb
 369         p->ecb.in_use = 0;
 370         //ipx_listen_for_packet(&p->ecb);
 371 }
 372
 373 /*ubyte * ipx_get_my_local_address()
 374 {
 375         return ipx_my_node.address;
 376 }
 377
 378 ubyte * ipx_get_my_server_address()
 379 {
 380         return (ubyte *)&ipx_network;
 381 }*/
 382
 383 static void ipx_listen_for_packet(ecb_header * ecb )
 384 {
 385         dpmi_real_regs rregs;
 386         ecb->in_use = 0x1d;
 387         memset(&rregs,0,sizeof(dpmi_real_regs));
 388         rregs.ebx = 4;  // Listen For Packet function
 389         rregs.esi = DPMI_real_offset(ecb);
 390         rregs.es = DPMI_real_segment(ecb);
 391         dpmi_real_int386x( 0x7A, &rregs );
 392 }
 393
 394 /*static void ipx_cancel_listen_for_packet(ecb_header * ecb )
 395 {
 396         dpmi_real_regs rregs;
 397         memset(&rregs,0,sizeof(dpmi_real_regs));
 398         rregs.ebx = 6;  // IPX Cancel event
 399         rregs.esi = DPMI_real_offset(ecb);
 400         rregs.es = DPMI_real_segment(ecb);
 401         dpmi_real_int386x( 0x7A, &rregs );
 402 }
 403 */
 404
 405 static void ipx_send_packet(ecb_header * ecb )
 406 {
 407         dpmi_real_regs rregs;
 408         memset(&rregs,0,sizeof(dpmi_real_regs));
 409         rregs.ebx = 3;  // Send Packet function
 410         rregs.esi = DPMI_real_offset(ecb);
 411         rregs.es = DPMI_real_segment(ecb);
 412         dpmi_real_int386x( 0x7A, &rregs );
 413 }
 414
 415 typedef struct {
 416         ubyte   network[4];
 417         ubyte           node[6];
 418         ubyte           local_target[6];
 419 } __pack__ net_xlat_info;
 420
 421 static void ipx_dos_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 422 {
 423         net_xlat_info * info;
 424         dpmi_real_regs rregs;
 425
 426         // Get dos memory for call...
 427         info = (net_xlat_info *)dpmi_get_temp_low_buffer( sizeof(net_xlat_info) );
 428         assert( info != NULL );
 429         memcpy( info->network, server, 4 );
 430         memcpy( info->node, node, 6 );
 431
 432         memset(&rregs,0,sizeof(dpmi_real_regs));
 433
 434         rregs.ebx = 2;          // Get Local Target
 435         rregs.es = DPMI_real_segment(info);
 436         rregs.esi = DPMI_real_offset(info->network);
 437         rregs.edi = DPMI_real_offset(info->local_target);
 438
 439         dpmi_real_int386x( 0x7A, &rregs );
 440
 441         // Save the local target...
 442         memcpy( local_target, info->local_target, 6 );
 443 }
 444
 445 static void ipx_dos_close()
 446 {
 447         dpmi_real_regs rregs;
 448         if ( ipx_installed )    {
 449                 // When using VLM's instead of NETX, the sockets don't
 450                 // seem to automatically get closed, so we must explicitly
 451                 // close them at program termination.
 452                 ipx_installed = 0;
 453                 memset(&rregs,0,sizeof(dpmi_real_regs));
 454                 rregs.edx = ipx_socket;
 455                 rregs.ebx = 1;  // Close socket
 456                 dpmi_real_int386x( 0x7A, &rregs );
 457         }
 458 }
 459
 460
 461 //---------------------------------------------------------------
 462 // Initializes all IPX internals.
 463 // If socket_number==0, then opens next available socket.
 464 // Returns:     0  if successful.
 465 //                              -1 if socket already open.
 466 //                              -2      if socket table full.
 467 //                              -3 if IPX not installed.
 468 //                              -4 if couldn't allocate low dos memory
 469 //                              -5 if error with getting internetwork address
 470
 471 static int ipx_dos_init( int socket_number )
 472 {
 473         int show_address=0;
 474         dpmi_real_regs rregs;
 475         ubyte *ipx_real_buffer;
 476         int i;
 477
 478 //      atexit(ipx_close);
 479
 480         ipx_packetnum = 0;
 481
 482         // init packet buffers.
 483         for (i=0; i<MAX_PACKETS; i++ )  {
 484                 packet_buffers[i].packetnum = -1;
 485                 packet_free_list[i] = i;
 486         }
 487         num_packets = 0;
 488         largest_packet_index = 0;
 489
 490         // Get the IPX vector
 491         memset(&rregs,0,sizeof(dpmi_real_regs));
 492         rregs.eax=0x00007a00;
 493         dpmi_real_int386x( 0x2f, &rregs );
 494
 495         if ( (rregs.eax & 0xFF) != 0xFF )       {
 496                 return 3;
 497         }
 498         ipx_vector_offset = rregs.edi & 0xFFFF;
 499         ipx_vector_segment = rregs.es;
 500         //printf( "IPX entry point at %.4x:%.4x\n", ipx_vector_segment, ipx_vector_offset );
 501
 502         // Open a socket for IPX
 503
 504         memset(&rregs,0,sizeof(dpmi_real_regs));
 505         swab( (char *)&socket_number,(char *)&ipx_socket, 2 );
 506         rregs.edx = ipx_socket;
 507         rregs.eax = ipx_socket_life;
 508         rregs.ebx = 0;  // Open socket
 509         dpmi_real_int386x( 0x7A, &rregs );
 510
 511         ipx_socket = rregs.edx & 0xFFFF;
 512
 513         if ( rregs.eax & 0xFF ) {
 514                 //mprintf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 515                 return -2;
 516         }
 517
 518         ipx_installed = 1;
 519
 520         // Find our internetwork address
 521         ipx_real_buffer = dpmi_get_temp_low_buffer( 1024 );     // 1k block
 522         if ( ipx_real_buffer == NULL )  {
 523                 //printf( "Error allocation realmode memory\n" );
 524                 return -4;
 525         }
 526
 527         memset(&rregs,0,sizeof(dpmi_real_regs));
 528         rregs.ebx = 9;          // Get internetwork address
 529         rregs.esi = DPMI_real_offset(ipx_real_buffer);
 530         rregs.es = DPMI_real_segment(ipx_real_buffer);
 531         dpmi_real_int386x( 0x7A, &rregs );
 532
 533         if ( rregs.eax & 0xFF ) {
 534                 //printf( "Error getting internetwork address!\n" );
 535                 return -2;
 536         }
 537
 538 /*      memcpy( &ipx_network, ipx_real_buffer, 4 );
 539         memcpy( ipx_my_node, &ipx_real_buffer[4], 6 );*/
 540         memcpy(ipx_MyAddress,ipx_real_buffer,10);
 541
 542         if ( show_address )     {
 543                 printf( "My IPX addresss is " );
 544                 printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 545                 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] );
 546                 printf( "\n" );
 547         }
 548
 549         packets = dpmi_real_malloc( sizeof(ipx_packet)*ipx_num_packets, &ipx_packets_selector );
 550         if ( packets == NULL )  {
 551                 //printf( "Couldn't allocate real memory for %d packets\n", ipx_num_packets );
 552                 return -4;
 553         }
 554 #if 0 /* adb: not needed, fails with cwsdpmi */
 555         if (!dpmi_lock_region( packets, sizeof(ipx_packet)*ipx_num_packets ))   {
 556                 //printf( "Couldn't lock real memory for %d packets\n", ipx_num_packets );
 557                 return -4;
 558         }
 559 #endif
 560         memset( packets, 0, sizeof(ipx_packet)*ipx_num_packets );
 561
 562         for (i=1; i<ipx_num_packets; i++ )      {
 563                 packets[i].ecb.in_use = 0x1d;
 564                 //packets[i].ecb.in_use = 0;
 565                 packets[i].ecb.socket_id = ipx_socket;
 566                 packets[i].ecb.fragment_count = 1;
 567                 packets[i].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[i].ipx);
 568                 packets[i].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[i].ipx);
 569                 packets[i].ecb.fragment_size = sizeof(ipx_packet)-sizeof(ecb_header);                   //-sizeof(ecb_header);
 570
 571                 ipx_listen_for_packet(&packets[i].ecb);
 572         }
 573
 574         packets[0].ecb.socket_id = ipx_socket;
 575         packets[0].ecb.fragment_count = 1;
 576         packets[0].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[0].ipx);
 577         packets[0].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[0].ipx);
 578         packets[0].ipx.packet_type = 4;         // IPX packet
 579         packets[0].ipx.destination.socket_id = ipx_socket;
 580 //      memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 581         memset( packets[0].ipx.destination.network_id, 0, 4 );
 582
 583         return 0;
 584 }
 585
 586 static void ipx_dos_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 587 {
 588         assert(ipx_installed);
 589
 590         if ( datasize >= IPX_MAX_DATA_SIZE )    {
 591                 printf( "Data too big\n" );
 592 //added/replaced on 11/8/98 by Victor Rachels to stop crappage
 593                 return;
 594 //                exit(1);
 595 //end this section replacement - VR
 596         }
 597
 598         // Make sure no one is already sending something
 599         while( packets[0].ecb.in_use )
 600         {
 601         }
 602
 603         if (packets[0].ecb.completion_code)     {
 604 //                printf( "Send error %d for completion code\n", packets[0].ecb.completion_code );
 605 //added/replaced on 11/8/98 by Victor Rachels to stop crappage
 606                 return;
 607         //        exit(1);
 608 //end this section replacement - VR
 609
 610         }
 611
 612         // Fill in destination address
 613         if ( memcmp( network, &ipx_network, 4 ) )
 614                 memcpy( packets[0].ipx.destination.network_id, network, 4 );
 615         else
 616                 memset( packets[0].ipx.destination.network_id, 0, 4 );
 617         memcpy( packets[0].ipx.destination.node_id.address, address, 6 );
 618         memcpy( packets[0].ecb.immediate_address.address, immediate_address, 6 );
 619         packets[0].pd.packetnum = ipx_packetnum++;
 620
 621         // Fill in data to send
 622         packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(int) + datasize;
 623
 624         assert( datasize > 1 );
 625         assert( packets[0].ecb.fragment_size <= 576 );
 626
 627         memcpy( packets[0].pd.data, data, datasize );
 628
 629         // Send it
 630         ipx_send_packet( &packets[0].ecb );
 631
 632 }
 633
 634 /*static int ipx_change_default_socket( ushort socket_number )
 635 {
 636         int i;
 637         WORD new_ipx_socket;
 638         dpmi_real_regs rregs;
 639
 640         if ( !ipx_installed ) return -3;
 641
 642         // Open a new socket
 643         memset(&rregs,0,sizeof(dpmi_real_regs));
 644         swab( (char *)&socket_number,(char *)&new_ipx_socket, 2 );
 645         rregs.edx = new_ipx_socket;
 646         rregs.eax = ipx_socket_life;
 647         rregs.ebx = 0;  // Open socket
 648         dpmi_real_int386x( 0x7A, &rregs );
 649
 650         new_ipx_socket = rregs.edx & 0xFFFF;
 651
 652         if ( rregs.eax & 0xFF ) {
 653                 //printf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 654                 return -2;
 655         }
 656
 657         for (i=1; i<ipx_num_packets; i++ )      {
 658                 ipx_cancel_listen_for_packet(&packets[i].ecb);
 659         }
 660
 661         // Close existing socket...
 662         memset(&rregs,0,sizeof(dpmi_real_regs));
 663         rregs.edx = ipx_socket;
 664         rregs.ebx = 1;  // Close socket
 665         dpmi_real_int386x( 0x7A, &rregs );
 666
 667         ipx_socket = new_ipx_socket;
 668
 669         // Repost all listen requests on the new socket...
 670         for (i=1; i<ipx_num_packets; i++ )      {
 671                 packets[i].ecb.in_use = 0;
 672                 packets[i].ecb.socket_id = ipx_socket;
 673                 ipx_listen_for_packet(&packets[i].ecb);
 674         }
 675
 676         packets[0].ecb.socket_id = ipx_socket;
 677         packets[0].ipx.destination.socket_id = ipx_socket;
 678
 679         ipx_packetnum = 0;
 680         // init packet buffers.
 681         for (i=0; i<MAX_PACKETS; i++ )  {
 682                 packet_buffers[i].packetnum = -1;
 683                 packet_free_list[i] = i;
 684         }
 685         num_packets = 0;
 686         largest_packet_index = 0;
 687
 688         return 0;
 689 }
 690 */
 691
 692 struct ipx_driver ipx_dos = {
 693 //      NULL,
 694         ipx_dos_init,
 695         ipx_dos_close,
 696         NULL,
 697         NULL,
 698         NULL,
 699         NULL,
 700         1,
 701         ipx_dos_get_local_target,
 702         ipx_dos_get_packet_data,
 703         ipx_dos_send_packet_data
 704 };
 705
 706 struct ipx_driver * arch_ipx_set_driver(char *arg)
 707 {
 708         return &ipx_dos;
 709 }
 710
 711
 712 //---typedef struct rip_entry {
 713 //---   uint            network;
 714 //---   ushort  nhops;
 715 //---   ushort  nticks;
 716 //---} rip_entry;
 717 //---
 718 //---typedef struct rip_packet {
 719 //---   ushort          operation;              //1=request, 2=response
 720 //---   rip_entry       rip[50];
 721 //---} rip_packet;
 722 //---
 723 //---
 724 //---void  ipx_find_all_servers()
 725 //---{
 726 //---   int i;
 727 //---   rip_packet * rp;
 728 //---   assert(ipx_installed);
 729 //---
 730 //---   ipx_change_default_socket( 0x0453 );
 731 //---   //      ipx_change_default_socket( 0x5304 );
 732 //---
 733 //---   // Make sure no one is already sending something
 734 //---   while( packets[0].ecb.in_use )
 735 //---   {
 736 //---   }
 737 //---
 738 //---   if (packets[0].ecb.completion_code)     {
 739 //---           printf( "AAAA:Send error %d for completion code\n", packets[0].ecb.completion_code );
 740 //---           //exit(1);
 741 //---   }
 742 //---
 743 //---   rp = (rip_packet *)&packets[0].pd;
 744 //---
 745 //---   // Fill in destination address
 746 //---   {
 747 //---           char mzero1[] = {0,0,0,1};
 748 //---           char mzero[] = {0,0,0,0,0,1};
 749 //---           char immediate[6];
 750 //---           //memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 751 //---           //memcpy( packets[0].ipx.destination.node_id.address, ipx_my_node.address, 6 );
 752 //---
 753 //---           memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 754 //---           memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 755 //---
 756 //---           memcpy( packets[0].ipx.destination.socket_id, &ipx_socket, 2 );
 757 //---           memcpy( packets[0].ipx.source.network_id, &ipx_network, 4 );
 758 //---           memcpy( packets[0].ipx.source.node_id.address, ipx_my_node.address, 6 );
 759 //---           memcpy( packets[0].ipx.source.socket_id, &ipx_socket, 2 );
 760 //---           //memcpy( packets[0].ecb.immediate_address.address, ipx_my_node.address, 6 );
 761 //---           //mzero1[3] = 1;
 762 //---           //memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 763 //---           //mzero[5] = 1;
 764 //---           //memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 765 //---           //ipx_get_local_target( mzero1, mzero, immediate );
 766 //---           //memcpy( packets[0].ecb.immediate_address.address, mzero, 6 );
 767 //---           //memcpy( packets[0].ecb.immediate_address.address, immediate, 6 );
 768 //---           //mzero[5] = 0;
 769 //---   }
 770 //---
 771 //---   packets[0].ipx.packet_type = 1;         // RIP packet
 772 //---
 773 //---   // Fill in data to send
 774 //---   packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(rip_packet);
 775 //---   assert( packets[0].ecb.fragment_size <= 576 );
 776 //---
 777 //---   rp->operation = 0;              // Request
 778 //---   for (i=0;i<50; i++)     {
 779 //---           rp->rip[i].network = 0xFFFFFFFF;
 780 //---           rp->rip[i].nhops = 0;
 781 //---           rp->rip[i].nticks = 0;
 782 //---   }
 783 //---
 784 //---   // Send it
 785 //---   ipx_send_packet( &packets[0].ecb );
 786 //---
 787 //---   for (i=0;i<50; i++)     {
 788 //---           if ( rp->rip[i].network != 0xFFFFFFFF )
 789 //---                   printf( "Network = %8x, Hops=%d, Ticks=%d\n", rp->rip[i].network, rp->rip[i].nhops, rp->rip[i].nticks );
 790 //---   }
 791 //---}
 792 //---
 793 //---