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  * $Source: /cvs/cvsroot/d2x/arch/dos/ipx.c,v $
  15  * $Revision: 1.1.1.1 $
  16  * $Author: bradleyb $
  17  * $Date: 2001-01-19 03:30:15 $
  18  *
  19  * Routines for IPX communications.
  20  *
  21  * $Log: not supported by cvs2svn $
  22  * Revision 1.1.1.1  1999/06/14 21:58:22  donut
  23  * Import of d1x 1.37 source.
  24  *
  25  * Revision 2.10  1995/03/29  17:27:55  john
  26  * Added code to not duplicate broadcasts.
  27  *
  28  * Revision 2.9  1995/03/29  15:32:07  john
  29  * NEatened.
  30  *
  31  * Revision 2.8  1995/03/29  15:07:31  john
  32  * Added network support.
  33  *
  34  * Revision 2.7  1995/03/29  11:22:27  john
  35  * Added broadcasting over a net.
  36  *
  37  * Revision 2.6  1995/03/28  20:05:03  john
  38  * Took away alternate server stuff.
  39  *
  40  * Revision 2.5  1995/03/23  19:14:29  john
  41  * Added better MAX_USERS message.
  42  *
  43  * Revision 2.4  1995/03/23  19:00:02  john
  44  * Added user list capabitly.
  45  *
  46  * Revision 2.3  1995/03/23  12:27:05  john
  47  * Move IPX into bios lib.
  48  *
  49  * Revision 2.2  1995/03/22  19:08:15  john
  50  * Added code to fix sending packets over router... now
  51  * we just need to make broadcasts go over router!!
  52  *
  53  * Revision 2.1  1995/03/21  08:40:16  john
  54  * Ifdef'd out the NETWORK code.
  55  *
  56  * Revision 2.0  1995/02/27  11:30:45  john
  57  * New version 2.0, which has no anonymous unions, builds with
  58  * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
  59  *
  60  * Revision 1.31  1995/02/16  17:35:03  john
  61  * Added code to allow dynamic socket changing.
  62  *
  63  * Revision 1.30  1995/02/01  21:03:45  john
  64  * Lintified.
  65  *
  66  * Revision 1.29  1995/01/22  14:31:05  john
  67  * Added key.h
  68  *
  69  * Revision 1.28  1995/01/22  14:29:26  john
  70  * Added code to bypass broadcast messages.
  71  *
  72  * Revision 1.27  1995/01/03  13:46:16  john
  73  * Added code that should make ipx work over different servers,
  74  * but ifdef'd it out with SHAREWARE in ipx.c.  I haven't tested
  75  * this, and I hope it doesn't introduce net bugs.
  76  *
  77  * Revision 1.26  1994/12/14  11:54:37  rob
  78  * Reduce # of ipx packets.
  79  *
  80  * Revision 1.25  1994/12/11  00:43:28  john
  81  * Locked down DOS ipx buffers... probably not necessary, tho.
  82  *
  83  * Revision 1.24  1994/12/08  15:49:58  rob
  84  * Bumped up the # of ipx packets.
  85  *
  86  * Revision 1.23  1994/12/04  15:23:54  rob
  87  * Reduced packet # constants.
  88  *
  89  * Revision 1.22  1994/11/27  23:12:39  matt
  90  * Made changes for new mprintf calling convention
  91  *
  92  * Revision 1.21  1994/11/19  15:15:19  mike
  93  * remove unused code and data
  94  *
  95  * Revision 1.20  1994/11/10  11:06:07  rob
  96  * Raised number of ipx packets to 64 and buffers to 128 (for 8-way games)
  97  * Removed (commented out) all the spx support stuff.
  98  *
  99  * Revision 1.19  1994/11/07  17:50:12  rob
 100  * Bumped up max_packets and ipx_num_packets to double their previous
 101  * values.
 102  *
 103  * Revision 1.18  1994/11/07  15:39:01  rob
 104  * Removed temporary hacked ipx_send_object function.
 105  * Replaced with a more general thing.
 106  *
 107  * Revision 1.17  1994/11/05  16:08:40  rob
 108  * Made a change necessary for object syncing on rejoin.
 109  *
 110  * Revision 1.16  1994/11/01  15:57:12  rob
 111  * Added support for SPX sockets for critical messages.
 112  *
 113  * Revision 1.15  1994/10/31  19:21:01  rob
 114  * Added a routine for sending objects via ipx.  Its a hack and shoukld
 115  * be replaced by something more general time permitting.
 116  *
 117  * Revision 1.14  1994/10/20  14:57:42  john
 118  * Some test stuff.
 119  *
 120  * Revision 1.13  1994/10/20  11:22:45  john
 121  * Tweaked the number of waiting packets. Added code to print
 122  * total packets missed, and to limit the packet send rate to
 123  * 10 packets per second unless firing.
 124  *
 125  * Revision 1.12  1994/10/03  20:50:11  john
 126  * Started adding sound pause functions.
 127  *
 128  * Revision 1.11  1994/09/15  08:54:24  mike
 129  * comment out a mprintf.
 130  *
 131  * Revision 1.10  1994/09/12  19:38:20  john
 132  * Made some stuff that prints to the DOS screen go to the
 133  * mono instead, since it really is debugging info.
 134  *
 135  * Revision 1.9  1994/09/07  13:32:03  john
 136  * Made ipx_close explicitly close the socket we were using,
 137  * because it seems that VLM's don't automatically close them
 138  * like the older NETX stuff did (Going from Novell 3.11 driver
 139  * to 3.12 anyway).
 140  *
 141  * Revision 1.8  1994/09/06  19:29:20  john
 142  * Added trial version of rejoin function.
 143  *
 144  * Revision 1.7  1994/08/09  19:31:50  john
 145  * Networking changes.
 146  *
 147  * Revision 1.6  1994/08/05  16:11:41  john
 148  * Psuedo working version of networking.
 149  *
 150  * Revision 1.5  1994/08/04  19:17:21  john
 151  * Inbetween version of network stuff.
 152  *
 153  * Revision 1.4  1994/07/29  16:08:57  john
 154  * *** empty log message ***
 155  *
 156  * Revision 1.3  1994/07/25  12:33:31  john
 157  * Network "pinging" in.
 158  *
 159  * Revision 1.2  1994/07/20  15:58:28  john
 160  * First installment of ipx stuff.
 161  *
 162  * Revision 1.1  1994/07/19  15:42:00  john
 163  * Initial revision
 164  *
 165  *
 166  */
 167
 168 #ifdef RCS
 169 static char rcsid[] = "$Id: ipx.c,v 1.1.1.1 2001-01-19 03:30:15 bradleyb Exp $";
 170 #endif
 171
 172 #ifdef __GNUC__
 173 #define _BORLAND_DOS_REGS 1
 174 #define far
 175 #endif
 176
 177 #include <i86.h>
 178 #include <dos.h>
 179 #include <stdio.h>
 180 #include <string.h>
 181 #include <malloc.h>
 182 #include <stdlib.h>
 183 #include <conio.h>
 184 #include <assert.h>
 185
 186 #include "types.h"
 187 #include "timer.h"
 188 #include "ipx.h"
 189 #include "error.h"
 190 #include "u_dpmi.h"
 191 #include "key.h"
 192
 193 typedef unsigned char BYTE;
 194 typedef unsigned short WORD;
 195 typedef unsigned long DWORD;
 196
 197 typedef struct local_address {
 198         ubyte address[6];
 199 } __pack__ local_address;
 200
 201 typedef struct net_address {
 202         BYTE                            network_id[4];
 203         local_address   node_id;
 204         WORD                            socket_id;
 205 } __pack__ net_address;
 206
 207 typedef struct ipx_header {
 208         WORD                    checksum;
 209         WORD                    length;
 210         BYTE                    transport_control;
 211         BYTE                    packet_type;
 212         net_address     destination;
 213         net_address     source;
 214 } __pack__ ipx_header;
 215
 216 typedef struct ecb_header {
 217         WORD                    link[2];
 218         WORD                    esr_address[2];
 219         BYTE                    in_use;
 220         BYTE                    completion_code;
 221         WORD                    socket_id;
 222         BYTE                    ipx_reserved[14];
 223         WORD                    connection_id;
 224         local_address immediate_address;
 225         WORD                    fragment_count;
 226         WORD                    fragment_pointer[2];
 227         WORD                    fragment_size;
 228 } __pack__ ecb_header;
 229
 230 typedef struct packet_data {
 231         int                     packetnum;
 232         byte                    data[IPX_MAX_DATA_SIZE];
 233 } __pack__ packet_data;
 234
 235 typedef struct ipx_packet {
 236         ecb_header      ecb;
 237         ipx_header      ipx;
 238         packet_data     pd;
 239 } __pack__ ipx_packet;
 240
 241 typedef struct user_address {
 242         ubyte network[4];
 243         ubyte node[6];
 244         ubyte address[6];
 245 } __pack__ user_address;
 246
 247 #define MAX_USERS 64
 248 int Ipx_num_users = 0;
 249 user_address Ipx_users[MAX_USERS];
 250
 251 #define MAX_NETWORKS 64
 252 int Ipx_num_networks = 0;
 253 uint Ipx_networks[MAX_NETWORKS];
 254
 255 int ipx_packetnum = 0;
 256
 257 #define MAX_PACKETS 64
 258
 259 static packet_data packet_buffers[MAX_PACKETS];
 260 static short packet_free_list[MAX_PACKETS];
 261 static int num_packets = 0;
 262 static int largest_packet_index = 0;
 263 static short packet_size[MAX_PACKETS];
 264
 265 WORD ipx_socket=0;
 266 ubyte ipx_installed=0;
 267 WORD ipx_vector_segment;
 268 WORD ipx_vector_offset;
 269 ubyte ipx_socket_life = 0;      // 0=closed at prog termination, 0xff=closed when requested.
 270 DWORD ipx_network = 0;
 271 local_address ipx_my_node;
 272 WORD ipx_num_packets=32;                // 32 Ipx packets
 273 ipx_packet * packets;
 274 int neterrors = 0;
 275 ushort ipx_packets_selector;
 276
 277 ecb_header * last_ecb=NULL;
 278 int lastlen=0;
 279
 280 void got_new_packet( ecb_header * ecb );
 281 void ipx_listen_for_packet(ecb_header * ecb );
 282
 283 void free_packet( int id )
 284 {
 285         packet_buffers[id].packetnum = -1;
 286         packet_free_list[ --num_packets ] = id;
 287         if (largest_packet_index==id)
 288                 while ((--largest_packet_index>0) && (packet_buffers[largest_packet_index].packetnum == -1 ));
 289 }
 290
 291 int ipx_get_packet_data( ubyte * data )
 292 {
 293         int i, n, best, best_id, size;
 294
 295         for (i=1; i<ipx_num_packets; i++ )      {
 296                 if ( !packets[i].ecb.in_use )   {
 297                         got_new_packet( &packets[i].ecb );
 298                         packets[i].ecb.in_use = 0;
 299                         ipx_listen_for_packet(&packets[i].ecb);
 300                 }
 301         }
 302
 303         best = -1;
 304         n = 0;
 305         best_id = -1;
 306
 307         for (i=0; i<=largest_packet_index; i++ )        {
 308                 if ( packet_buffers[i].packetnum > -1 ) {
 309                         n++;
 310                         if ( best == -1 || (packet_buffers[i].packetnum<best) ) {
 311                                 best = packet_buffers[i].packetnum;
 312                                 best_id = i;
 313                         }
 314                 }
 315         }
 316
 317         //mprintf( (0, "Best id = %d, pn = %d, last_ecb = %x, len=%x, ne = %d\n", best_id, best, last_ecb, lastlen, neterrors ));
 318         //mprintf( (1, "<%d> ", neterrors ));
 319
 320         if ( best_id < 0 ) return 0;
 321
 322         size = packet_size[best_id];
 323         memcpy( data, packet_buffers[best_id].data, size );
 324         free_packet(best_id);
 325
 326         return size;
 327 }
 328
 329 #ifndef __GNUC__
 330 unsigned int swap_short( unsigned int short )
 331 #pragma aux swap_short parm [eax] = "xchg al,ah";
 332 #else
 333 static inline unsigned int swap_short( unsigned int sshort ) {
 334         int __retval;
 335         asm("xchg %%ah,%%al" : "=a" (__retval) : "a" (sshort));
 336         return __retval;
 337 }
 338 #endif
 339
 340 void got_new_packet( ecb_header * ecb )
 341 {
 342         ipx_packet * p;
 343         int id;
 344         unsigned short datasize;
 345
 346         datasize = 0;
 347         last_ecb = ecb;
 348         p = (ipx_packet *)ecb;
 349
 350         if ( p->ecb.in_use ) { neterrors++; return; }
 351         if      ( p->ecb.completion_code )      { neterrors++; return; }
 352
 353         //      Error( "Recieve error %d for completion code", p->ecb.completion_code );
 354
 355         if ( memcmp( &p->ipx.source.node_id, &ipx_my_node, 6 ) )        {
 356                 datasize=swap_short(p->ipx.length);
 357                 lastlen=datasize;
 358                 datasize -= sizeof(ipx_header);
 359                 // Find slot to put packet in...
 360                 if ( datasize > 0 && datasize <= sizeof(packet_data) )  {
 361                         if ( num_packets >= MAX_PACKETS ) {
 362                                 //printf( 1, "IPX: Packet buffer overrun!!!\n" );
 363                                 neterrors++;
 364                                 return;
 365                         }
 366                         id = packet_free_list[ num_packets++ ];
 367                         if (id > largest_packet_index ) largest_packet_index = id;
 368                         packet_size[id] = datasize-sizeof(int);
 369                         packet_buffers[id].packetnum =  p->pd.packetnum;
 370                         if ( packet_buffers[id].packetnum < 0 ) { neterrors++; return; }
 371                         memcpy( packet_buffers[id].data, p->pd.data, packet_size[id] );
 372                 } else {
 373                         neterrors++; return;
 374                 }
 375         }
 376         // Repost the ecb
 377         p->ecb.in_use = 0;
 378         //ipx_listen_for_packet(&p->ecb);
 379 }
 380
 381 ubyte * ipx_get_my_local_address()
 382 {
 383         return ipx_my_node.address;
 384 }
 385
 386 ubyte * ipx_get_my_server_address()
 387 {
 388         return (ubyte *)&ipx_network;
 389 }
 390
 391 void ipx_listen_for_packet(ecb_header * ecb )
 392 {
 393         dpmi_real_regs rregs;
 394         ecb->in_use = 0x1d;
 395         memset(&rregs,0,sizeof(dpmi_real_regs));
 396         rregs.ebx = 4;  // Listen For Packet function
 397         rregs.esi = DPMI_real_offset(ecb);
 398         rregs.es = DPMI_real_segment(ecb);
 399         dpmi_real_int386x( 0x7A, &rregs );
 400 }
 401
 402 void ipx_cancel_listen_for_packet(ecb_header * ecb )
 403 {
 404         dpmi_real_regs rregs;
 405         memset(&rregs,0,sizeof(dpmi_real_regs));
 406         rregs.ebx = 6;  // IPX Cancel event
 407         rregs.esi = DPMI_real_offset(ecb);
 408         rregs.es = DPMI_real_segment(ecb);
 409         dpmi_real_int386x( 0x7A, &rregs );
 410 }
 411
 412
 413 void ipx_send_packet(ecb_header * ecb )
 414 {
 415         dpmi_real_regs rregs;
 416         memset(&rregs,0,sizeof(dpmi_real_regs));
 417         rregs.ebx = 3;  // Send Packet function
 418         rregs.esi = DPMI_real_offset(ecb);
 419         rregs.es = DPMI_real_segment(ecb);
 420         dpmi_real_int386x( 0x7A, &rregs );
 421 }
 422
 423 typedef struct {
 424         ubyte   network[4];
 425         ubyte           node[6];
 426         ubyte           local_target[6];
 427 } __pack__ net_xlat_info;
 428
 429 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 430 {
 431         net_xlat_info * info;
 432         dpmi_real_regs rregs;
 433
 434         // Get dos memory for call...
 435         info = (net_xlat_info *)dpmi_get_temp_low_buffer( sizeof(net_xlat_info) );
 436         assert( info != NULL );
 437         memcpy( info->network, server, 4 );
 438         memcpy( info->node, node, 6 );
 439
 440         memset(&rregs,0,sizeof(dpmi_real_regs));
 441
 442         rregs.ebx = 2;          // Get Local Target
 443         rregs.es = DPMI_real_segment(info);
 444         rregs.esi = DPMI_real_offset(info->network);
 445         rregs.edi = DPMI_real_offset(info->local_target);
 446
 447         dpmi_real_int386x( 0x7A, &rregs );
 448
 449         // Save the local target...
 450         memcpy( local_target, info->local_target, 6 );
 451 }
 452
 453 void ipx_close()
 454 {
 455         dpmi_real_regs rregs;
 456         if ( ipx_installed )    {
 457                 // When using VLM's instead of NETX, the sockets don't
 458                 // seem to automatically get closed, so we must explicitly
 459                 // close them at program termination.
 460                 ipx_installed = 0;
 461                 memset(&rregs,0,sizeof(dpmi_real_regs));
 462                 rregs.edx = ipx_socket;
 463                 rregs.ebx = 1;  // Close socket
 464                 dpmi_real_int386x( 0x7A, &rregs );
 465         }
 466 }
 467
 468
 469 //---------------------------------------------------------------
 470 // Initializes all IPX internals.
 471 // If socket_number==0, then opens next available socket.
 472 // Returns:     0  if successful.
 473 //                              -1 if socket already open.
 474 //                              -2      if socket table full.
 475 //                              -3 if IPX not installed.
 476 //                              -4 if couldn't allocate low dos memory
 477 //                              -5 if error with getting internetwork address
 478
 479 int ipx_init( int socket_number, int show_address )
 480 {
 481         dpmi_real_regs rregs;
 482         ubyte *ipx_real_buffer;
 483         int i;
 484
 485         atexit(ipx_close);
 486
 487         ipx_packetnum = 0;
 488
 489         // init packet buffers.
 490         for (i=0; i<MAX_PACKETS; i++ )  {
 491                 packet_buffers[i].packetnum = -1;
 492                 packet_free_list[i] = i;
 493         }
 494         num_packets = 0;
 495         largest_packet_index = 0;
 496
 497         // Get the IPX vector
 498         memset(&rregs,0,sizeof(dpmi_real_regs));
 499         rregs.eax=0x00007a00;
 500         dpmi_real_int386x( 0x2f, &rregs );
 501
 502         if ( (rregs.eax & 0xFF) != 0xFF )       {
 503                 return 3;
 504         }
 505         ipx_vector_offset = rregs.edi & 0xFFFF;
 506         ipx_vector_segment = rregs.es;
 507         //printf( "IPX entry point at %.4x:%.4x\n", ipx_vector_segment, ipx_vector_offset );
 508
 509         // Open a socket for IPX
 510
 511         memset(&rregs,0,sizeof(dpmi_real_regs));
 512         swab( (char *)&socket_number,(char *)&ipx_socket, 2 );
 513         rregs.edx = ipx_socket;
 514         rregs.eax = ipx_socket_life;
 515         rregs.ebx = 0;  // Open socket
 516         dpmi_real_int386x( 0x7A, &rregs );
 517
 518         ipx_socket = rregs.edx & 0xFFFF;
 519
 520         if ( rregs.eax & 0xFF ) {
 521                 //mprintf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 522                 return -2;
 523         }
 524
 525         ipx_installed = 1;
 526
 527         // Find our internetwork address
 528         ipx_real_buffer = dpmi_get_temp_low_buffer( 1024 );     // 1k block
 529         if ( ipx_real_buffer == NULL )  {
 530                 //printf( "Error allocation realmode memory\n" );
 531                 return -4;
 532         }
 533
 534         memset(&rregs,0,sizeof(dpmi_real_regs));
 535         rregs.ebx = 9;          // Get internetwork address
 536         rregs.esi = DPMI_real_offset(ipx_real_buffer);
 537         rregs.es = DPMI_real_segment(ipx_real_buffer);
 538         dpmi_real_int386x( 0x7A, &rregs );
 539
 540         if ( rregs.eax & 0xFF ) {
 541                 //printf( "Error getting internetwork address!\n" );
 542                 return -2;
 543         }
 544
 545         memcpy( &ipx_network, ipx_real_buffer, 4 );
 546         memcpy( &ipx_my_node, &ipx_real_buffer[4], 6 );
 547
 548         Ipx_num_networks = 0;
 549         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 550
 551         if ( show_address )     {
 552                 printf( "My IPX addresss is " );
 553                 printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 554                 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] );
 555                 printf( "\n" );
 556         }
 557
 558         packets = dpmi_real_malloc( sizeof(ipx_packet)*ipx_num_packets, &ipx_packets_selector );
 559         if ( packets == NULL )  {
 560                 //printf( "Couldn't allocate real memory for %d packets\n", ipx_num_packets );
 561                 return -4;
 562         }
 563 #if 0 /* adb: not needed, fails with cwsdpmi */
 564         if (!dpmi_lock_region( packets, sizeof(ipx_packet)*ipx_num_packets ))   {
 565                 //printf( "Couldn't lock real memory for %d packets\n", ipx_num_packets );
 566                 return -4;
 567         }
 568 #endif
 569         memset( packets, 0, sizeof(ipx_packet)*ipx_num_packets );
 570
 571         for (i=1; i<ipx_num_packets; i++ )      {
 572                 packets[i].ecb.in_use = 0x1d;
 573                 //packets[i].ecb.in_use = 0;
 574                 packets[i].ecb.socket_id = ipx_socket;
 575                 packets[i].ecb.fragment_count = 1;
 576                 packets[i].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[i].ipx);
 577                 packets[i].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[i].ipx);
 578                 packets[i].ecb.fragment_size = sizeof(ipx_packet)-sizeof(ecb_header);                   //-sizeof(ecb_header);
 579
 580                 ipx_listen_for_packet(&packets[i].ecb);
 581         }
 582
 583         packets[0].ecb.socket_id = ipx_socket;
 584         packets[0].ecb.fragment_count = 1;
 585         packets[0].ecb.fragment_pointer[0] = DPMI_real_offset(&packets[0].ipx);
 586         packets[0].ecb.fragment_pointer[1] = DPMI_real_segment(&packets[0].ipx);
 587         packets[0].ipx.packet_type = 4;         // IPX packet
 588         packets[0].ipx.destination.socket_id = ipx_socket;
 589 //      memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 590         memset( packets[0].ipx.destination.network_id, 0, 4 );
 591
 592         return 0;
 593 }
 594
 595 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 596 {
 597         assert(ipx_installed);
 598
 599         if ( datasize >= IPX_MAX_DATA_SIZE )    {
 600                 printf( "Data too big\n" );
 601 //added/replaced on 11/8/98 by Victor Rachels to stop crappage
 602                 return;
 603 //                exit(1);
 604 //end this section replacement - VR
 605         }
 606
 607         // Make sure no one is already sending something
 608         while( packets[0].ecb.in_use )
 609         {
 610         }
 611
 612         if (packets[0].ecb.completion_code)     {
 613 //                printf( "Send error %d for completion code\n", packets[0].ecb.completion_code );
 614 //added/replaced on 11/8/98 by Victor Rachels to stop crappage
 615                 return;
 616         //        exit(1);
 617 //end this section replacement - VR
 618
 619         }
 620
 621         // Fill in destination address
 622         if ( memcmp( network, &ipx_network, 4 ) )
 623                 memcpy( packets[0].ipx.destination.network_id, network, 4 );
 624         else
 625                 memset( packets[0].ipx.destination.network_id, 0, 4 );
 626         memcpy( packets[0].ipx.destination.node_id.address, address, 6 );
 627         memcpy( packets[0].ecb.immediate_address.address, immediate_address, 6 );
 628         packets[0].pd.packetnum = ipx_packetnum++;
 629
 630         // Fill in data to send
 631         packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(int) + datasize;
 632
 633         assert( datasize > 1 );
 634         assert( packets[0].ecb.fragment_size <= 576 );
 635
 636         memcpy( packets[0].pd.data, data, datasize );
 637
 638         // Send it
 639         ipx_send_packet( &packets[0].ecb );
 640
 641 }
 642
 643 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 644 {
 645         int i, j;
 646         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 647         ubyte local_address[6];
 648
 649         // Set to all networks besides mine
 650         for (i=0; i<Ipx_num_networks; i++ )     {
 651                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 652                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 653                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 654                 } else {
 655                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 656                 }
 657         }
 658
 659         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 660
 661         // Send directly to all users not on my network or in the network list.
 662         for (i=0; i<Ipx_num_users; i++ )        {
 663                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 664                         for (j=0; j<Ipx_num_networks; j++ )             {
 665                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 666                                         goto SkipUser;
 667                         }
 668                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 669 SkipUser:
 670                         j = 0;
 671                 }
 672         }
 673 }
 674
 675 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 676 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 677 {
 678         ubyte local_address[6];
 679
 680         if ( (*(uint *)server) != 0 )   {
 681                 ipx_get_local_target( server, address, local_address );
 682                 ipx_send_packet_data( data, datasize, server, address, local_address );
 683         } else {
 684                 // Old method, no server info.
 685                 ipx_send_packet_data( data, datasize, server, address, address );
 686         }
 687 }
 688
 689 int ipx_change_default_socket( ushort socket_number )
 690 {
 691         int i;
 692         WORD new_ipx_socket;
 693         dpmi_real_regs rregs;
 694
 695         if ( !ipx_installed ) return -3;
 696
 697         // Open a new socket
 698         memset(&rregs,0,sizeof(dpmi_real_regs));
 699         swab( (char *)&socket_number,(char *)&new_ipx_socket, 2 );
 700         rregs.edx = new_ipx_socket;
 701         rregs.eax = ipx_socket_life;
 702         rregs.ebx = 0;  // Open socket
 703         dpmi_real_int386x( 0x7A, &rregs );
 704
 705         new_ipx_socket = rregs.edx & 0xFFFF;
 706
 707         if ( rregs.eax & 0xFF ) {
 708                 //printf( (1, "IPX error opening channel %d\n", socket_number-IPX_DEFAULT_SOCKET ));
 709                 return -2;
 710         }
 711
 712         for (i=1; i<ipx_num_packets; i++ )      {
 713                 ipx_cancel_listen_for_packet(&packets[i].ecb);
 714         }
 715
 716         // Close existing socket...
 717         memset(&rregs,0,sizeof(dpmi_real_regs));
 718         rregs.edx = ipx_socket;
 719         rregs.ebx = 1;  // Close socket
 720         dpmi_real_int386x( 0x7A, &rregs );
 721
 722         ipx_socket = new_ipx_socket;
 723
 724         // Repost all listen requests on the new socket...
 725         for (i=1; i<ipx_num_packets; i++ )      {
 726                 packets[i].ecb.in_use = 0;
 727                 packets[i].ecb.socket_id = ipx_socket;
 728                 ipx_listen_for_packet(&packets[i].ecb);
 729         }
 730
 731         packets[0].ecb.socket_id = ipx_socket;
 732         packets[0].ipx.destination.socket_id = ipx_socket;
 733
 734         ipx_packetnum = 0;
 735         // init packet buffers.
 736         for (i=0; i<MAX_PACKETS; i++ )  {
 737                 packet_buffers[i].packetnum = -1;
 738                 packet_free_list[i] = i;
 739         }
 740         num_packets = 0;
 741         largest_packet_index = 0;
 742
 743         return 0;
 744 }
 745
 746 void ipx_read_user_file(char * filename)
 747 {
 748         FILE * fp;
 749         user_address tmp;
 750         char temp_line[132], *p1;
 751         int n, ln=0;
 752
 753         if (!filename) return;
 754
 755         Ipx_num_users = 0;
 756
 757         fp = fopen( filename, "rt" );
 758         if ( !fp ) return;
 759
 760         printf( "Broadcast Users:\n" );
 761
 762         while (fgets(temp_line, 132, fp)) {
 763                 ln++;
 764                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 765                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 766                 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] );
 767                 if ( n != 10 ) continue;
 768                 if ( Ipx_num_users < MAX_USERS )        {
 769                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 770                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 771                         Ipx_users[Ipx_num_users++] = tmp;
 772                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 773                         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] );
 774                 } else {
 775                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 776                         fclose(fp);
 777                         return;
 778                 }
 779         }
 780         fclose(fp);
 781 }
 782
 783
 784 void ipx_read_network_file(char * filename)
 785 {
 786         FILE * fp;
 787         user_address tmp;
 788         char temp_line[132], *p1;
 789         int i, n, ln=0;
 790
 791         if (!filename) return;
 792
 793         fp = fopen( filename, "rt" );
 794         if ( !fp ) return;
 795
 796         printf( "Using Networks:\n" );
 797         for (i=0; i<Ipx_num_networks; i++ )             {
 798                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 799                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 800         }
 801
 802         while (fgets(temp_line, 132, fp)) {
 803                 ln++;
 804                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 805                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 806                 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] );
 807                 if ( n != 4 ) continue;
 808                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 809                         int j;
 810                         for (j=0; j<Ipx_num_networks; j++ )
 811                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 812                                         break;
 813                         if ( j >= Ipx_num_networks )    {
 814                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 815                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 816                         }
 817                 } else {
 818                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 819                         fclose(fp);
 820                         return;
 821                 }
 822         }
 823         fclose(fp);
 824
 825 }
 826
 827 //---typedef struct rip_entry {
 828 //---   uint            network;
 829 //---   ushort  nhops;
 830 //---   ushort  nticks;
 831 //---} rip_entry;
 832 //---
 833 //---typedef struct rip_packet {
 834 //---   ushort          operation;              //1=request, 2=response
 835 //---   rip_entry       rip[50];
 836 //---} rip_packet;
 837 //---
 838 //---
 839 //---void  ipx_find_all_servers()
 840 //---{
 841 //---   int i;
 842 //---   rip_packet * rp;
 843 //---   assert(ipx_installed);
 844 //---
 845 //---   ipx_change_default_socket( 0x0453 );
 846 //---   //      ipx_change_default_socket( 0x5304 );
 847 //---
 848 //---   // Make sure no one is already sending something
 849 //---   while( packets[0].ecb.in_use )
 850 //---   {
 851 //---   }
 852 //---
 853 //---   if (packets[0].ecb.completion_code)     {
 854 //---           printf( "AAAA:Send error %d for completion code\n", packets[0].ecb.completion_code );
 855 //---           //exit(1);
 856 //---   }
 857 //---
 858 //---   rp = (rip_packet *)&packets[0].pd;
 859 //---
 860 //---   // Fill in destination address
 861 //---   {
 862 //---           char mzero1[] = {0,0,0,1};
 863 //---           char mzero[] = {0,0,0,0,0,1};
 864 //---           char immediate[6];
 865 //---           //memcpy( packets[0].ipx.destination.network_id, &ipx_network, 4 );
 866 //---           //memcpy( packets[0].ipx.destination.node_id.address, ipx_my_node.address, 6 );
 867 //---
 868 //---           memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 869 //---           memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 870 //---
 871 //---           memcpy( packets[0].ipx.destination.socket_id, &ipx_socket, 2 );
 872 //---           memcpy( packets[0].ipx.source.network_id, &ipx_network, 4 );
 873 //---           memcpy( packets[0].ipx.source.node_id.address, ipx_my_node.address, 6 );
 874 //---           memcpy( packets[0].ipx.source.socket_id, &ipx_socket, 2 );
 875 //---           //memcpy( packets[0].ecb.immediate_address.address, ipx_my_node.address, 6 );
 876 //---           //mzero1[3] = 1;
 877 //---           //memcpy( packets[0].ipx.destination.network_id, mzero1, 4 );
 878 //---           //mzero[5] = 1;
 879 //---           //memcpy( packets[0].ipx.destination.node_id.address, mzero, 6 );
 880 //---           //ipx_get_local_target( mzero1, mzero, immediate );
 881 //---           //memcpy( packets[0].ecb.immediate_address.address, mzero, 6 );
 882 //---           //memcpy( packets[0].ecb.immediate_address.address, immediate, 6 );
 883 //---           //mzero[5] = 0;
 884 //---   }
 885 //---
 886 //---   packets[0].ipx.packet_type = 1;         // RIP packet
 887 //---
 888 //---   // Fill in data to send
 889 //---   packets[0].ecb.fragment_size = sizeof(ipx_header) + sizeof(rip_packet);
 890 //---   assert( packets[0].ecb.fragment_size <= 576 );
 891 //---
 892 //---   rp->operation = 0;              // Request
 893 //---   for (i=0;i<50; i++)     {
 894 //---           rp->rip[i].network = 0xFFFFFFFF;
 895 //---           rp->rip[i].nhops = 0;
 896 //---           rp->rip[i].nticks = 0;
 897 //---   }
 898 //---
 899 //---   // Send it
 900 //---   ipx_send_packet( &packets[0].ecb );
 901 //---
 902 //---   for (i=0;i<50; i++)     {
 903 //---           if ( rp->rip[i].network != 0xFFFFFFFF )
 904 //---                   printf( "Network = %8x, Hops=%d, Ticks=%d\n", rp->rip[i].network, rp->rip[i].nhops, rp->rip[i].nticks );
 905 //---   }
 906 //---}
 907 //---
 908 //---