arch/dos/ipx.c

   1 /* $Id: ipx.c,v 1.6 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, copied from d1x
  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 HAVE_CONFIG_H
 164 #include <conf.h>
 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 "pstypes.h"
 182 #include "timer.h"
 183 #include "ipx.h"
 184 #include "error.h"
 185 #include "u_dpmi.h"
 186 #include "key.h"
 187 #include "ipx_drv.h"
 188
 189 typedef unsigned char BYTE;
 190 typedef unsigned short WORD;
 191 typedef unsigned long DWORD;
 192
 193 typedef struct local_address {
 194         ubyte address[6];
 195 } __pack__ local_address;
 196
 197 typedef struct net_address {
 198         BYTE                            network_id[4];
 199         local_address   node_id;
 200         WORD                            socket_id;
 201 } __pack__ net_address;
 202
 203 typedef struct ipx_header {
 204         WORD                    checksum;
 205         WORD                    length;
 206         BYTE                    transport_control;
 207         BYTE                    packet_type;
 208         net_address     destination;
 209         net_address     source;
 210 } __pack__ ipx_header;
 211
 212 typedef struct ecb_header {
 213         WORD                    link[2];
 214         WORD                    esr_address[2];
 215         BYTE                    in_use;
 216         BYTE                    completion_code;
 217         WORD                    socket_id;
 218         BYTE                    ipx_reserved[14];
 219         WORD                    connection_id;
 220         local_address immediate_address;
 221         WORD                    fragment_count;
 222         WORD                    fragment_pointer[2];
 223         WORD                    fragment_size;
 224 } __pack__ ecb_header;
 225
 226 typedef struct packet_data {
 227         int                     packetnum;
 228         byte                    data[IPX_MAX_DATA_SIZE];
 229 } __pack__ packet_data;
 230
 231 typedef struct ipx_packet {
 232         ecb_header      ecb;
 233         ipx_header      ipx;
 234         packet_data     pd;
 235 } __pack__ ipx_packet;
 236
 237 static int ipx_packetnum = 0;
 238
 239 #define MAX_PACKETS 64
 240
 241 static packet_data packet_buffers[MAX_PACKETS];
 242 static short packet_free_list[MAX_PACKETS];
 243 static int num_packets = 0;
 244 static int largest_packet_index = 0;
 245 static short packet_size[MAX_PACKETS];
 246
 247 WORD ipx_socket=0;
 248 static ubyte ipx_installed=0;
 249 WORD ipx_vector_segment;
 250 WORD ipx_vector_offset;
 251 ubyte ipx_socket_life = 0;      // 0=closed at prog termination, 0xff=closed when requested.
 252 //DWORD ipx_network = 0;
 253 //local_address ipx_my_node;
 254 #define ipx_my_node (ipx_MyAddress+4)
 255 WORD ipx_num_packets=32;                // 32 Ipx packets
 256 ipx_packet * packets;
 257 int neterrors = 0;
 258 ushort ipx_packets_selector;
 259
 260 ecb_header * last_ecb=NULL;
 261 int lastlen=0;
 262
 263 static void got_new_packet( ecb_header * ecb );
 264 static void ipx_listen_for_packet(ecb_header * ecb );
 265
 266 static void free_packet( int id )
 267 {
 268         packet_buffers[id].packetnum = -1;
 269         packet_free_list[ --num_packets ] = id;
 270         if (largest_packet_index==id)
 271                 while ((--largest_packet_index>0) && (packet_buffers[largest_packet_index].packetnum == -1 ));
 272 }
 273
 274 static int ipx_dos_get_packet_data( ubyte * data )
 275 {
 276         int i, n, best, best_id, size;
 277
 278         for (i=1; i<ipx_num_packets; i++ )      {
 279                 if ( !packets[i].ecb.in_use )   {
 280                         got_new_packet( &packets[i].ecb );
 281                         packets[i].ecb.in_use = 0;
 282                         ipx_listen_for_packet(&packets[i].ecb);
 283                 }
 284         }
 285
 286         best = -1;
 287         n = 0;
 288         best_id = -1;
 289
 290         for (i=0; i<=largest_packet_index; i++ )        {
 291                 if ( packet_buffers[i].packetnum > -1 ) {
 292                         n++;
 293                         if ( best == -1 || (packet_buffers[i].packetnum<best) ) {
 294                                 best = packet_buffers[i].packetnum;
 295                                 best_id = i;
 296                         }
 297                 }
 298         }
 299
 300         //mprintf( (0, "Best id = %d, pn = %d, last_ecb = %x, len=%x, ne = %d\n", best_id, best, last_ecb, lastlen, neterrors ));
 301         //mprintf( (1, "<%d> ", neterrors ));
 302
 303         if ( best_id < 0 ) return 0;
 304
 305         size = packet_size[best_id];
 306         memcpy( data, packet_buffers[best_id].data, size );
 307         free_packet(best_id);
 308
 309         return size;
 310 }
 311
 312 #ifndef __GNUC__
 313 unsigned int swap_short( unsigned int short )
 314 #pragma aux swap_short parm [eax] = "xchg al,ah";
 315 #else
 316 static inline unsigned int swap_short( unsigned int sshort ) {
 317         int __retval;
 318         asm("xchg %%ah,%%al" : "=a" (__retval) : "a" (sshort));
 319         return __retval;
 320 }
 321 #endif
 322
 323 static void got_new_packet( ecb_header * ecb )
 324 {
 325         ipx_packet * p;
 326         int id;
 327         unsigned short datasize;
 328
 329         datasize = 0;
 330         last_ecb = ecb;
 331         p = (ipx_packet *)ecb;
 332
 333         if ( p->ecb.in_use ) { neterrors++; return; }
 334         if      ( p->ecb.completion_code )      { neterrors++; return; }
 335
 336         //      Error( "Recieve error %d for completion code", p->ecb.completion_code );
 337
 338         if ( memcmp( &p->ipx.source.node_id, ipx_my_node, 6 ) ) {
 339                 datasize=swap_short(p->ipx.length);
 340                 lastlen=datasize;
 341                 datasize -= sizeof(ipx_header);
 342                 // Find slot to put packet in...
 343                 if ( datasize > 0 && datasize <= sizeof(packet_data) )  {
 344                         if ( num_packets >= MAX_PACKETS ) {
 345                                 //printf( 1, "IPX: Packet buffer overrun!!!\n" );
 346                                 neterrors++;
 347                                 return;
 348                         }
 349                         id = packet_free_list[ num_packets++ ];
 350                         if (id > largest_packet_index ) largest_packet_index = id;
 351                         packet_size[id] = datasize-sizeof(int);
 352                         packet_buffers[id].packetnum =  p->pd.packetnum;
 353                         if ( packet_buffers[id].packetnum < 0 ) { neterrors++; return; }
 354                         memcpy( packet_buffers[id].data, p->pd.data, packet_size[id] );
 355                 } else {
 356                         neterrors++; return;
 357                 }
 358         }
 359         // Repost the ecb
 360         p->ecb.in_use = 0;
 361         //ipx_listen_for_packet(&p->ecb);
 362 }
 363
 364 /*ubyte * ipx_get_my_local_address()
 365 {
 366         return ipx_my_node.address;
 367 }
 368
 369 ubyte * ipx_get_my_server_address()
 370 {
 371         return (ubyte *)&ipx_network;
 372 }*/
 373
 374 static void ipx_listen_for_packet(ecb_header * ecb )
 375 {
 376         dpmi_real_regs rregs;
 377         ecb->in_use = 0x1d;
 378         memset(&rregs,0,sizeof(dpmi_real_regs));
 379         rregs.ebx = 4;  // Listen For Packet function
 380         rregs.esi = DPMI_real_offset(ecb);
 381         rregs.es = DPMI_real_segment(ecb);
 382         dpmi_real_int386x( 0x7A, &rregs );
 383 }
 384
 385 /*static void ipx_cancel_listen_for_packet(ecb_header * ecb )
 386 {
 387         dpmi_real_regs rregs;
 388         memset(&rregs,0,sizeof(dpmi_real_regs));
 389         rregs.ebx = 6;  // IPX Cancel event
 390         rregs.esi = DPMI_real_offset(ecb);
 391         rregs.es = DPMI_real_segment(ecb);
 392         dpmi_real_int386x( 0x7A, &rregs );
 393 }
 394 */
 395
 396 static void ipx_send_packet(ecb_header * ecb )
 397 {
 398         dpmi_real_regs rregs;
 399         memset(&rregs,0,sizeof(dpmi_real_regs));
 400         rregs.ebx = 3;  // Send Packet function
 401         rregs.esi = DPMI_real_offset(ecb);
 402         rregs.es = DPMI_real_segment(ecb);
 403         dpmi_real_int386x( 0x7A, &rregs );
 404 }
 405
 406 typedef struct {
 407         ubyte   network[4];
 408         ubyte           node[6];
 409         ubyte           local_target[6];
 410 } __pack__ net_xlat_info;
 411
 412 static void ipx_dos_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 413 {
 414         net_xlat_info * info;
 415         dpmi_real_regs rregs;
 416
 417         // Get dos memory for call...
 418         info = (net_xlat_info *)dpmi_get_temp_low_buffer( sizeof(net_xlat_info) );
 419         assert( info != NULL );
 420         memcpy( info->network, server, 4 );
 421         memcpy( info->node, node, 6 );
 422
 423         memset(&rregs,0,sizeof(dpmi_real_regs));
 424
 425         rregs.ebx = 2;          // Get Local Target
 426         rregs.es = DPMI_real_segment(info);
 427         rregs.esi = DPMI_real_offset(info->network);
 428         rregs.edi = DPMI_real_offset(info->local_target);
 429
 430         dpmi_real_int386x( 0x7A, &rregs );
 431
 432         // Save the local target...
 433         memcpy( local_target, info->local_target, 6 );
 434 }
 435
 436 static void ipx_close()
 437 {
 438         dpmi_real_regs rregs;
 439         if ( ipx_installed )    {
 440                 // When using VLM's instead of NETX, the sockets don't
 441                 // seem to automatically get closed, so we must explicitly
 442                 // close them at program termination.
 443                 ipx_installed = 0;
 444                 memset(&rregs,0,sizeof(dpmi_real_regs));
 445                 rregs.edx = ipx_socket;
 446                 rregs.ebx = 1;  // Close socket
 447                 dpmi_real_int386x( 0x7A, &rregs );
 448         }
 449 }
 450
 451 static int ipx_init(int socket_number)
 452 {
 453         int show_address=0;
 454         dpmi_real_regs rregs;
 455         ubyte *ipx_real_buffer;
 456         int i;
 457
 458 //      atexit(ipx_close);
 459
 460         ipx_packetnum = 0;
 461
 462         // init packet buffers.
 463         for (i=0; i<MAX_PACKETS; i++ )  {
 464                 packet_buffers[i].packetnum = -1;
 465                 packet_free_list[i] = i;
 466         }
 467         num_packets = 0;
 468         largest_packet_index = 0;
 469
 470         // Get the IPX vector
 471         memset(&rregs,0,sizeof(dpmi_real_regs));
 472         rregs.eax=0x00007a00;
 473         dpmi_real_int386x( 0x2f, &rregs );
 474
 475         if ( (rregs.eax & 0xFF) != 0xFF )       {
 476                 return IPX_NOT_INSTALLED;
 477         }
 478         ipx_vector_offset = rregs.edi & 0xFFFF;
 479         ipx_vector_segment = rregs.es;
 480         //printf( "IPX entry point at %.4x:%.4x\n", ipx_vector_segment, ipx_vector_offset );
 481
 482         // Open a socket for IPX
 483
 484         memset(&rregs,0,sizeof(dpmi_real_regs));
 485         swab( (char *)&socket_number,(char *)&ipx_socket, 2 );
 486         rregs.edx = ipx_socket;
 487         rregs.eax = ipx_socket_life;
 488         rregs.ebx = 0;  // Open socket
 489         dpmi_real_int386x( 0x7A, &rregs );
 490
 491         ipx_socket = rregs.edx & 0xFFFF;
 492
 493         if ( rregs.eax & 0xFF ) {
 494                 //mprintf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 495                 return IPX_SOCKET_TABLE_FULL;
 496         }
 497
 498         ipx_installed = 1;
 499
 500         // Find our internetwork address
 501         ipx_real_buffer = dpmi_get_temp_low_buffer( 1024 );     // 1k block
 502         if ( ipx_real_buffer == NULL )  {
 503                 //printf( "Error allocation realmode memory\n" );
 504                 return IPX_NO_LOW_DOS_MEM;
 505         }
 506
 507         memset(&rregs,0,sizeof(dpmi_real_regs));
 508         rregs.ebx = 9;          // Get internetwork address
 509         rregs.esi = DPMI_real_offset(ipx_real_buffer);
 510         rregs.es = DPMI_real_segment(ipx_real_buffer);
 511         dpmi_real_int386x( 0x7A, &rregs );
 512
 513         if ( rregs.eax & 0xFF ) {
 514                 //printf( "Error getting internetwork address!\n" );
 515                 return IPX_SOCKET_TABLE_FULL;
 516         }
 517
 518 /*      memcpy( &ipx_network, ipx_real_buffer, 4 );
 519         memcpy( ipx_my_node, &ipx_real_buffer[4], 6 );*/
 520         memcpy(ipx_MyAddress,ipx_real_buffer,10);
 521
 522         if ( show_address )     {
 523                 printf( "My IPX addresss is " );
 524                 printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 525                 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] );
 526                 printf( "\n" );
 527         }
 528
 529         packets = dpmi_real_malloc( sizeof(ipx_packet)*ipx_num_packets, &ipx_packets_selector );
 530         if ( packets == NULL )  {
 531                 //printf( "Couldn't allocate real memory for %d packets\n", ipx_num_packets );
 532                 return IPX_NO_LOW_DOS_MEM;
 533         }
 534 #if 0 /* adb: not needed, fails with cwsdpmi */
 535         if (!dpmi_lock_region( packets, sizeof(ipx_packet)*ipx_num_packets ))   {
 536                 //printf( "Couldn't lock real memory for %d packets\n", ipx_num_packets );
 537                 return IPX_NO_LOW_DOS_MEM;
 538         }
 539 #endif
 540         memset( packets, 0, sizeof(ipx_packet)*ipx_num_packets );
 541
 542         for (i=1; i<ipx_num_packets; i++ )      {
 543                 packets[i].ecb.in_use = 0x1d;
 544                 //packets[i].ecb.in_use = 0;
 545                 packets[i].ecb.socket_id = ipx_socket;
 546                 packets[i].ecb.fragment_count = 1;
 547                 packets[i].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[i].ipx);
 548                 packets[i].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[i].ipx);
 549                 packets[i].ecb.fragment_size = sizeof(ipx_packet)-sizeof(ecb_header);                   //-sizeof(ecb_header);
 550
 551                 ipx_listen_for_packet(&packets[i].ecb);
 552         }
 553
 554         packets[0].ecb.socket_id = ipx_socket;
 555         packets[0].ecb.fragment_count = 1;
 556         packets[0].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[0].ipx);
 557         packets[0].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[0].ipx);
 558         packets[0].ipx.packet_type = 4;         // IPX packet
 559         packets[0].ipx.destination.socket_id = ipx_socket;
 560 //      memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 561         memset( packets[0].ipx.destination.network_id, 0, 4 );
 562
 563         return IPX_INIT_OK;
 564 }
 565
 566 static void ipx_dos_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 567 {
 568         assert(ipx_installed);
 569
 570         if ( datasize >= IPX_MAX_DATA_SIZE )    {
 571                 printf( "Data too big\n" );
 572 //added/replaced on 11/8/98 by Victor Rachels to stop crappage
 573                 return;
 574 //                exit(1);
 575 //end this section replacement - VR
 576         }
 577
 578         // Make sure no one is already sending something
 579         while( packets[0].ecb.in_use )
 580         {
 581         }
 582
 583         if (packets[0].ecb.completion_code)     {
 584 //                printf( "Send error %d for completion code\n", packets[0].ecb.completion_code );
 585 //added/replaced on 11/8/98 by Victor Rachels to stop crappage
 586                 return;
 587         //        exit(1);
 588 //end this section replacement - VR
 589
 590         }
 591
 592         // Fill in destination address
 593         if ( memcmp( network, &ipx_network, 4 ) )
 594                 memcpy( packets[0].ipx.destination.network_id, network, 4 );
 595         else
 596                 memset( packets[0].ipx.destination.network_id, 0, 4 );
 597         memcpy( packets[0].ipx.destination.node_id.address, address, 6 );
 598         memcpy( packets[0].ecb.immediate_address.address, immediate_address, 6 );
 599         packets[0].pd.packetnum = ipx_packetnum++;
 600
 601         // Fill in data to send
 602         packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(int) + datasize;
 603
 604         assert( datasize > 1 );
 605         assert( packets[0].ecb.fragment_size <= 576 );
 606
 607         memcpy( packets[0].pd.data, data, datasize );
 608
 609         // Send it
 610         ipx_send_packet( &packets[0].ecb );
 611
 612 }
 613
 614 /*static int ipx_change_default_socket( ushort socket_number )
 615 {
 616         int i;
 617         WORD new_ipx_socket;
 618         dpmi_real_regs rregs;
 619
 620         if ( !ipx_installed ) return -3;
 621
 622         // Open a new socket
 623         memset(&rregs,0,sizeof(dpmi_real_regs));
 624         swab( (char *)&socket_number,(char *)&new_ipx_socket, 2 );
 625         rregs.edx = new_ipx_socket;
 626         rregs.eax = ipx_socket_life;
 627         rregs.ebx = 0;  // Open socket
 628         dpmi_real_int386x( 0x7A, &rregs );
 629
 630         new_ipx_socket = rregs.edx & 0xFFFF;
 631
 632         if ( rregs.eax & 0xFF ) {
 633                 //printf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 634                 return -2;
 635         }
 636
 637         for (i=1; i<ipx_num_packets; i++ )      {
 638                 ipx_cancel_listen_for_packet(&packets[i].ecb);
 639         }
 640
 641         // Close existing socket...
 642         memset(&rregs,0,sizeof(dpmi_real_regs));
 643         rregs.edx = ipx_socket;
 644         rregs.ebx = 1;  // Close socket
 645         dpmi_real_int386x( 0x7A, &rregs );
 646
 647         ipx_socket = new_ipx_socket;
 648
 649         // Repost all listen requests on the new socket...
 650         for (i=1; i<ipx_num_packets; i++ )      {
 651                 packets[i].ecb.in_use = 0;
 652                 packets[i].ecb.socket_id = ipx_socket;
 653                 ipx_listen_for_packet(&packets[i].ecb);
 654         }
 655
 656         packets[0].ecb.socket_id = ipx_socket;
 657         packets[0].ipx.destination.socket_id = ipx_socket;
 658
 659         ipx_packetnum = 0;
 660         // init packet buffers.
 661         for (i=0; i<MAX_PACKETS; i++ )  {
 662                 packet_buffers[i].packetnum = -1;
 663                 packet_free_list[i] = i;
 664         }
 665         num_packets = 0;
 666         largest_packet_index = 0;
 667
 668         return 0;
 669 }
 670 */
 671
 672 struct ipx_driver ipx_dos = {
 673 //      NULL,
 674         ipx_init,
 675         ipx_close,
 676         NULL,
 677         NULL,
 678         NULL,
 679         NULL,
 680         1,
 681         ipx_dos_get_local_target,
 682         ipx_dos_get_packet_data,
 683         ipx_dos_send_packet_data
 684 };
 685
 686 void arch_ipx_set_driver(int ipx_driver)
 687 {
 688         driver = &ipx_dos;
 689         if (ipx_driver != IPX_DRIVER_IPX)
 690                 Warning("Unknown network driver! Defaulting to real IPX");
 691 }
 692
 693
 694 //---typedef struct rip_entry {
 695 //---   uint            network;
 696 //---   ushort  nhops;
 697 //---   ushort  nticks;
 698 //---} rip_entry;
 699 //---
 700 //---typedef struct rip_packet {
 701 //---   ushort          operation;              //1=request, 2=response
 702 //---   rip_entry       rip[50];
 703 //---} rip_packet;
 704 //---
 705 //---
 706 //---void  ipx_find_all_servers()
 707 //---{
 708 //---   int i;
 709 //---   rip_packet * rp;
 710 //---   assert(ipx_installed);
 711 //---
 712 //---   ipx_change_default_socket( 0x0453 );
 713 //---   //      ipx_change_default_socket( 0x5304 );
 714 //---
 715 //---   // Make sure no one is already sending something
 716 //---   while( packets[0].ecb.in_use )
 717 //---   {
 718 //---   }
 719 //---
 720 //---   if (packets[0].ecb.completion_code)     {
 721 //---           printf( "AAAA:Send error %d for completion code\n", packets[0].ecb.completion_code );
 722 //---           //exit(1);
 723 //---   }
 724 //---
 725 //---   rp = (rip_packet *)&packets[0].pd;
 726 //---
 727 //---   // Fill in destination address
 728 //---   {
 729 //---           char mzero1[] = {0,0,0,1};
 730 //---           char mzero[] = {0,0,0,0,0,1};
 731 //---           char immediate[6];
 732 //---           //memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 733 //---           //memcpy( packets[0].ipx.destination.node_id.address, ipx_my_node.address, 6 );
 734 //---
 735 //---           memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 736 //---           memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 737 //---
 738 //---           memcpy( packets[0].ipx.destination.socket_id, &ipx_socket, 2 );
 739 //---           memcpy( packets[0].ipx.source.network_id, &ipx_network, 4 );
 740 //---           memcpy( packets[0].ipx.source.node_id.address, ipx_my_node.address, 6 );
 741 //---           memcpy( packets[0].ipx.source.socket_id, &ipx_socket, 2 );
 742 //---           //memcpy( packets[0].ecb.immediate_address.address, ipx_my_node.address, 6 );
 743 //---           //mzero1[3] = 1;
 744 //---           //memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 745 //---           //mzero[5] = 1;
 746 //---           //memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 747 //---           //ipx_get_local_target( mzero1, mzero, immediate );
 748 //---           //memcpy( packets[0].ecb.immediate_address.address, mzero, 6 );
 749 //---           //memcpy( packets[0].ecb.immediate_address.address, immediate, 6 );
 750 //---           //mzero[5] = 0;
 751 //---   }
 752 //---
 753 //---   packets[0].ipx.packet_type = 1;         // RIP packet
 754 //---
 755 //---   // Fill in data to send
 756 //---   packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(rip_packet);
 757 //---   assert( packets[0].ecb.fragment_size <= 576 );
 758 //---
 759 //---   rp->operation = 0;              // Request
 760 //---   for (i=0;i<50; i++)     {
 761 //---           rp->rip[i].network = 0xFFFFFFFF;
 762 //---           rp->rip[i].nhops = 0;
 763 //---           rp->rip[i].nticks = 0;
 764 //---   }
 765 //---
 766 //---   // Send it
 767 //---   ipx_send_packet( &packets[0].ecb );
 768 //---
 769 //---   for (i=0;i<50; i++)     {
 770 //---           if ( rp->rip[i].network != 0xFFFFFFFF )
 771 //---                   printf( "Network = %8x, Hops=%d, Ticks=%d\n", rp->rip[i].network, rp->rip[i].nhops, rp->rip[i].nticks );
 772 //---   }
 773 //---}
 774 //---
 775 //---