arch/win32/winnet.c

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