arch/win32/winnet.c

   1 /* $Id: winnet.c,v 1.8 2003-10-05 22:27:01 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  * Win32 lower-level network code.
  18  * implements functions declared in include/ipx.h
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <conf.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <winsock.h>
  30
  31 #include "args.h"
  32 #include "error.h"
  33 #include "ipx.h"
  34 #include "ipx_drv.h"
  35 #include "ipx_udp.h"
  36
  37 extern struct ipx_driver ipx_win;
  38
  39 #define MAX_IPX_DATA 576
  40
  41 int ipx_fd;
  42 ipx_socket_t ipx_socket_data;
  43 ubyte ipx_installed=0;
  44 ushort ipx_socket = 0;
  45 uint ipx_network = 0;
  46 ubyte ipx_MyAddress[10];
  47 int ipx_packetnum = 0;                  /* Sequence number */
  48
  49 /* User defined routing stuff */
  50 typedef struct user_address {
  51         ubyte network[4];
  52         ubyte node[6];
  53         ubyte address[6];
  54 } user_address;
  55 #define MAX_USERS 64
  56 int Ipx_num_users = 0;
  57 user_address Ipx_users[MAX_USERS];
  58
  59 #define MAX_NETWORKS 64
  60 int Ipx_num_networks = 0;
  61 uint Ipx_networks[MAX_NETWORKS];
  62
  63 int ipx_general_PacketReady(ipx_socket_t *s) {
  64         fd_set set;
  65         struct timeval tv;
  66
  67         FD_ZERO(&set);
  68         FD_SET(s->fd, &set);
  69         tv.tv_sec = tv.tv_usec = 0;
  70         if (select(FD_SETSIZE, &set, NULL, NULL, &tv) > 0)
  71                 return 1;
  72         else
  73                 return 0;
  74 }
  75
  76 struct ipx_driver *driver = &ipx_win;
  77
  78 ubyte * ipx_get_my_server_address()
  79 {
  80         return (ubyte *)&ipx_network;
  81 }
  82
  83 ubyte * ipx_get_my_local_address()
  84 {
  85         return (ubyte *)(ipx_MyAddress + 4);
  86 }
  87
  88 void arch_ipx_set_driver(int ipx_driver)
  89 {
  90         switch(ipx_driver) {
  91         case IPX_DRIVER_IPX: driver = &ipx_win; break;
  92         case IPX_DRIVER_UDP: driver = &ipx_udp; break;
  93         default: Int3();
  94         }
  95 }
  96
  97 int ipx_init(int socket_number)
  98 {
  99         int i;
 100
 101         WORD wVersionRequested;
 102         WSADATA wsaData;
 103
 104         wVersionRequested = MAKEWORD(2, 0);
 105         if (WSAStartup( wVersionRequested, &wsaData))
 106         {
 107           return IPX_SOCKET_ALREADY_OPEN;
 108         }
 109
 110 #if 0
 111         if ( LOBYTE( wsaData.wVersion ) != 2 ||
 112           HIBYTE( wsaData.wVersion ) != 0 ) {
 113            /* We couldn't find a usable WinSock DLL. */
 114            WSACleanup( );
 115            return IPX_SOCKET_TABLE_FULL;
 116         }
 117 #endif
 118
 119         if ((i = FindArg("-ipxnetwork")) && Args[i + 1]) {
 120                 unsigned long n = strtol(Args[i + 1], NULL, 16);
 121                 ipx_MyAddress[0] = (unsigned char)n >> 24; ipx_MyAddress[1] = (unsigned char)(n >> 16) & 255;
 122                 ipx_MyAddress[2] = (unsigned char)(n >> 8) & 255; ipx_MyAddress[3] = (unsigned char)n & 255;
 123                 printf("IPX: Using network %08x\n", (int) n);
 124         }
 125         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 126                 return IPX_NOT_INSTALLED;
 127         }
 128         driver->GetMyAddress();
 129         memcpy(&ipx_network, ipx_MyAddress, 4);
 130         Ipx_num_networks = 0;
 131         memcpy( &Ipx_networks[Ipx_num_networks++], &ipx_network, 4 );
 132         ipx_installed = 1;
 133         atexit(ipx_close);
 134         printf("ipx succesfully installed\n");
 135         return IPX_INIT_OK;
 136 }
 137
 138 void ipx_close()
 139 {
 140         if (ipx_installed) {
 141                 WSACleanup();
 142                 driver->CloseSocket(&ipx_socket_data);
 143         }
 144         ipx_installed = 0;
 145 }
 146
 147 int ipx_get_packet_data( ubyte * data )
 148 {
 149         struct ipx_recv_data rd;
 150         char buf[MAX_IPX_DATA];
 151         uint best_id = 0;
 152         uint pkt_num;
 153         int size;
 154         int best_size = 0;
 155
 156         // Like the original, only take latest packet, throw away rest
 157         while (driver->PacketReady(&ipx_socket_data)) {
 158                 if ((size =
 159                      driver->ReceivePacket(&ipx_socket_data, buf,
 160                       sizeof(buf), &rd)) > 4) {
 161                      if (!memcmp(rd.src_network, ipx_MyAddress, 10))
 162                         continue;       /* don't get own pkts */
 163                      pkt_num = *(uint *)buf;
 164                      if (pkt_num >= best_id) {
 165                         memcpy(data, buf + 4, size - 4);
 166                         best_id = pkt_num;
 167                         best_size = size - 4;
 168                      }
 169                 }
 170         }
 171         return best_size;
 172 }
 173
 174 void ipx_send_packet_data( ubyte * data, int datasize, ubyte *network, ubyte *address, ubyte *immediate_address )
 175 {
 176         u_char buf[MAX_IPX_DATA];
 177         IPXPacket_t ipx_header;
 178
 179         memcpy(ipx_header.Destination.Network, network, 4);
 180         memcpy(ipx_header.Destination.Node, immediate_address, 6);
 181         *(u_short *)ipx_header.Destination.Socket = htons(ipx_socket_data.socket);
 182         ipx_header.PacketType = 4; /* Packet Exchange */
 183         *(uint *)buf = ipx_packetnum++;
 184         memcpy(buf + 4, data, datasize);
 185         driver->SendPacket(&ipx_socket_data, &ipx_header, buf, datasize + 4);
 186 }
 187
 188 void ipx_get_local_target( ubyte * server, ubyte * node, ubyte * local_target )
 189 {
 190         // let's hope Linux knows how to route it
 191         memcpy( local_target, node, 6 );
 192 }
 193
 194 void ipx_send_broadcast_packet_data( ubyte * data, int datasize )
 195 {
 196         int i, j;
 197         ubyte broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 198         ubyte local_address[6];
 199
 200         // Set to all networks besides mine
 201         for (i=0; i<Ipx_num_networks; i++ )     {
 202                 if ( memcmp( &Ipx_networks[i], &ipx_network, 4 ) )      {
 203                         ipx_get_local_target( (ubyte *)&Ipx_networks[i], broadcast, local_address );
 204                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, local_address );
 205                 } else {
 206                         ipx_send_packet_data( data, datasize, (ubyte *)&Ipx_networks[i], broadcast, broadcast );
 207                 }
 208         }
 209
 210         //OLDipx_send_packet_data( data, datasize, (ubyte *)&ipx_network, broadcast, broadcast );
 211
 212         // Send directly to all users not on my network or in the network list.
 213         for (i=0; i<Ipx_num_users; i++ )        {
 214                 if ( memcmp( Ipx_users[i].network, &ipx_network, 4 ) )  {
 215                         for (j=0; j<Ipx_num_networks; j++ )             {
 216                                 if (!memcmp( Ipx_users[i].network, &Ipx_networks[j], 4 ))
 217                                         goto SkipUser;
 218                         }
 219                         ipx_send_packet_data( data, datasize, Ipx_users[i].network, Ipx_users[i].node, Ipx_users[i].address );
 220 SkipUser:
 221                         j = 0;
 222                 }
 223         }
 224 }
 225
 226 // Sends a non-localized packet... needs 4 byte server, 6 byte address
 227 void ipx_send_internetwork_packet_data( ubyte * data, int datasize, ubyte * server, ubyte *address )
 228 {
 229         ubyte local_address[6];
 230
 231         if ( (*(uint *)server) != 0 )   {
 232                 ipx_get_local_target( server, address, local_address );
 233                 ipx_send_packet_data( data, datasize, server, address, local_address );
 234         } else {
 235                 // Old method, no server info.
 236                 ipx_send_packet_data( data, datasize, server, address, address );
 237         }
 238 }
 239
 240 int ipx_change_default_socket( ushort socket_number )
 241 {
 242         if ( !ipx_installed ) return -3;
 243
 244         driver->CloseSocket(&ipx_socket_data);
 245         if (driver->OpenSocket(&ipx_socket_data, socket_number)) {
 246                 return -3;
 247         }
 248         return 0;
 249 }
 250
 251 void ipx_read_user_file(char * filename)
 252 {
 253         FILE * fp;
 254         user_address tmp;
 255         char temp_line[132], *p1;
 256         int n, ln=0, x;
 257
 258         if (!filename) return;
 259
 260         Ipx_num_users = 0;
 261
 262         fp = fopen( filename, "rt" );
 263         if ( !fp ) return;
 264
 265         printf( "Broadcast Users:\n" );
 266
 267         while (fgets(temp_line, 132, fp)) {
 268                 ln++;
 269                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 270                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 271 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 272                 if (strlen(temp_line) >= 21 && temp_line[8] == '/') {
 273                         for (n = 0; n < 4; n++) {
 274                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 275                                         break;
 276                                 tmp.network[n] = x;
 277                         }
 278                         if (n != 4)
 279                                 continue;
 280                         for (n = 0; n < 6; n++) {
 281                                 if (sscanf(temp_line + 9 + n * 2, "%2x", &x) != 1)
 282                                         break;
 283                                 tmp.node[n] = x;
 284                         }
 285                         if (n != 6)
 286                                 continue;
 287                 } else
 288                         continue;
 289 #else
 290                 n = sscanf( temp_line, "%2x%2x%2x%2x/%2x%2x%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3], &tmp.node[0], &tmp.node[1], &tmp.node[2],&tmp.node[3], &tmp.node[4], &tmp.node[5] );
 291                 if ( n != 10 ) continue;
 292 #endif
 293                 if ( Ipx_num_users < MAX_USERS )        {
 294                         ubyte * ipx_real_buffer = (ubyte *)&tmp;
 295                         ipx_get_local_target( tmp.network, tmp.node, tmp.address );
 296                         Ipx_users[Ipx_num_users++] = tmp;
 297                         printf( "%02X%02X%02X%02X/", ipx_real_buffer[0],ipx_real_buffer[1],ipx_real_buffer[2],ipx_real_buffer[3] );
 298                         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] );
 299                 } else {
 300                         printf( "Too many addresses in %s! (Limit of %d)\n", filename, MAX_USERS );
 301                         fclose(fp);
 302                         return;
 303                 }
 304         }
 305         fclose(fp);
 306 }
 307
 308
 309 void ipx_read_network_file(char * filename)
 310 {
 311         FILE * fp;
 312         user_address tmp;
 313         char temp_line[132], *p1;
 314         int i, n, ln=0, x;
 315
 316         if (!filename) return;
 317
 318         fp = fopen( filename, "rt" );
 319         if ( !fp ) return;
 320
 321         printf( "Using Networks:\n" );
 322         for (i=0; i<Ipx_num_networks; i++ )             {
 323                 ubyte * n1 = (ubyte *)&Ipx_networks[i];
 324                 printf("* %02x%02x%02x%02x\n", n1[0], n1[1], n1[2], n1[3] );
 325         }
 326
 327         while (fgets(temp_line, 132, fp)) {
 328                 ln++;
 329                 p1 = strchr(temp_line,'\n'); if (p1) *p1 = '\0';
 330                 p1 = strchr(temp_line,';'); if (p1) *p1 = '\0';
 331 #if 1 // adb: replaced sscanf(..., "%2x...", (char *)...) with better, but longer code
 332                 if (strlen(temp_line) >= 8) {
 333                         for (n = 0; n < 4; n++) {
 334                                 if (sscanf(temp_line + n * 2, "%2x", &x) != 1)
 335                                         break;
 336                                 tmp.network[n] = x;
 337                         }
 338                         if (n != 4)
 339                                 continue;
 340                 } else
 341                         continue;
 342 #else
 343                 n = sscanf( temp_line, "%2x%2x%2x%2x", &tmp.network[0], &tmp.network[1], &tmp.network[2], &tmp.network[3] );
 344                 if ( n != 4 ) continue;
 345 #endif
 346                 if ( Ipx_num_networks < MAX_NETWORKS  ) {
 347                         int j;
 348                         for (j=0; j<Ipx_num_networks; j++ )
 349                                 if ( !memcmp( &Ipx_networks[j], tmp.network, 4 ) )
 350                                         break;
 351                         if ( j >= Ipx_num_networks )    {
 352                                 memcpy( &Ipx_networks[Ipx_num_networks++], tmp.network, 4 );
 353                                 printf("  %02x%02x%02x%02x\n", tmp.network[0], tmp.network[1], tmp.network[2], tmp.network[3] );
 354                         }
 355                 } else {
 356                         printf( "Too many networks in %s! (Limit of %d)\n", filename, MAX_NETWORKS );
 357                         fclose(fp);
 358                         return;
 359                 }
 360         }
 361         fclose(fp);
 362 }