net/nfs.c

   1 /*
   2  * NFS support driver - based on etherboot and U-BOOT's tftp.c
   3  *
   4  * Masami Komiya <mkomiya@sonare.it> 2004
   5  *
   6  */
   7
   8 /* NOTE: the NFS code is heavily inspired by the NetBSD netboot code (read:
   9  * large portions are copied verbatim) as distributed in OSKit 0.97.  A few
  10  * changes were necessary to adapt the code to Etherboot and to fix several
  11  * inconsistencies.  Also the RPC message preparation is done "by hand" to
  12  * avoid adding netsprintf() which I find hard to understand and use.  */
  13
  14 /* NOTE 2: Etherboot does not care about things beyond the kernel image, so
  15  * it loads the kernel image off the boot server (ARP_SERVER) and does not
  16  * access the client root disk (root-path in dhcpd.conf), which would use
  17  * ARP_ROOTSERVER.  The root disk is something the operating system we are
  18  * about to load needs to use.  This is different from the OSKit 0.97 logic.  */
  19
  20 /* NOTE 3: Symlink handling introduced by Anselm M Hoffmeister, 2003-July-14
  21  * If a symlink is encountered, it is followed as far as possible (recursion
  22  * possible, maximum 16 steps). There is no clearing of ".."'s inside the
  23  * path, so please DON'T DO THAT. thx. */
  24
  25 #include <common.h>
  26 #include <command.h>
  27 #include <clock.h>
  28 #include <net.h>
  29 #include <malloc.h>
  30 #include <libgen.h>
  31 #include <fs.h>
  32 #include "nfs.h"
  33
  34 /*#define NFS_DEBUG*/
  35
  36 #define HASHES_PER_LINE 65      /* Number of "loading" hashes per line  */
  37 #define NFS_TIMEOUT 60
  38
  39 static int fs_mounted = 0;
  40 static unsigned long rpc_id = 0;
  41 static int nfs_offset = -1;
  42 static int nfs_len;
  43
  44 static char dirfh[NFS_FHSIZE];  /* file handle of directory */
  45 static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
  46
  47 static int      NfsDownloadState;
  48 static IPaddr_t NfsServerIP;
  49 static int      NfsSrvMountPort;
  50 static int      NfsSrvNfsPort;
  51 static int      NfsOurPort;
  52 static int      NfsTimeoutCount;
  53 static int      NfsState;
  54 #define STATE_PRCLOOKUP_PROG_MOUNT_REQ  1
  55 #define STATE_PRCLOOKUP_PROG_NFS_REQ    2
  56 #define STATE_MOUNT_REQ                 3
  57 #define STATE_UMOUNT_REQ                4
  58 #define STATE_LOOKUP_REQ                5
  59 #define STATE_READ_REQ                  6
  60 #define STATE_READLINK_REQ              7
  61
  62 static char *nfs_filename;
  63 static char *nfs_path;
  64 static char nfs_path_buff[2048];
  65
  66 extern int net_store_fd;
  67
  68 static __inline__ int
  69 store_block (uchar * src, unsigned offset, unsigned len)
  70 {
  71         ulong newsize = offset + len;
  72         int ret;
  73
  74         ret = write(net_store_fd, src, len);
  75         if (ret < 0)
  76                 return ret;
  77
  78         if (NetBootFileXferSize < (offset+len))
  79                 NetBootFileXferSize = newsize;
  80
  81         return 0;
  82 }
  83
  84 /**************************************************************************
  85 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
  86 **************************************************************************/
  87 static long *rpc_add_credentials (long *p)
  88 {
  89         int hl;
  90         int hostnamelen;
  91         char hostname[256];
  92
  93         strcpy (hostname, "");
  94         hostnamelen=strlen (hostname);
  95
  96         /* Here's the executive summary on authentication requirements of the
  97          * various NFS server implementations:  Linux accepts both AUTH_NONE
  98          * and AUTH_UNIX authentication (also accepts an empty hostname field
  99          * in the AUTH_UNIX scheme).  *BSD refuses AUTH_NONE, but accepts
 100          * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
 101          * scheme).  To be safe, use AUTH_UNIX and pass the hostname if we have
 102          * it (if the BOOTP/DHCP reply didn't give one, just use an empty
 103          * hostname).  */
 104
 105         hl = (hostnamelen + 3) & ~3;
 106
 107         /* Provide an AUTH_UNIX credential.  */
 108         *p++ = htonl(1);                /* AUTH_UNIX */
 109         *p++ = htonl(hl+20);            /* auth length */
 110         *p++ = htonl(0);                /* stamp */
 111         *p++ = htonl(hostnamelen);      /* hostname string */
 112         if (hostnamelen & 3) {
 113                 *(p + hostnamelen / 4) = 0; /* add zero padding */
 114         }
 115         memcpy (p, hostname, hostnamelen);
 116         p += hl / 4;
 117         *p++ = 0;                       /* uid */
 118         *p++ = 0;                       /* gid */
 119         *p++ = 0;                       /* auxiliary gid list */
 120
 121         /* Provide an AUTH_NONE verifier.  */
 122         *p++ = 0;                       /* AUTH_NONE */
 123         *p++ = 0;                       /* auth length */
 124
 125         return p;
 126 }
 127
 128 /**************************************************************************
 129 RPC_LOOKUP - Lookup RPC Port numbers
 130 **************************************************************************/
 131 static void
 132 rpc_req (int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
 133 {
 134         struct rpc_t pkt;
 135         unsigned long id;
 136         uint32_t *p;
 137         int pktlen;
 138         int sport;
 139
 140         id = ++rpc_id;
 141         pkt.u.call.id = htonl(id);
 142         pkt.u.call.type = htonl(MSG_CALL);
 143         pkt.u.call.rpcvers = htonl(2);  /* use RPC version 2 */
 144         pkt.u.call.prog = htonl(rpc_prog);
 145         pkt.u.call.vers = htonl(2);     /* portmapper is version 2 */
 146         pkt.u.call.proc = htonl(rpc_proc);
 147         p = (uint32_t *)&(pkt.u.call.data);
 148
 149         if (datalen)
 150                 memcpy ((char *)p, (char *)data, datalen*sizeof(uint32_t));
 151
 152         pktlen = (char *)p + datalen*sizeof(uint32_t) - (char *)&pkt;
 153
 154         memcpy ((char *)NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE, (char *)&pkt, pktlen);
 155
 156         if (rpc_prog == PROG_PORTMAP)
 157                 sport = SUNRPC_PORT;
 158         else if (rpc_prog == PROG_MOUNT)
 159                 sport = NfsSrvMountPort;
 160         else
 161                 sport = NfsSrvNfsPort;
 162
 163         NetSendUDPPacket (NetServerEther, NfsServerIP, sport, NfsOurPort, pktlen);
 164 }
 165
 166 /**************************************************************************
 167 RPC_LOOKUP - Lookup RPC Port numbers
 168 **************************************************************************/
 169 static void
 170 rpc_lookup_req (int prog, int ver)
 171 {
 172         uint32_t data[16];
 173
 174         data[0] = 0; data[1] = 0;       /* auth credential */
 175         data[2] = 0; data[3] = 0;       /* auth verifier */
 176         data[4] = htonl(prog);
 177         data[5] = htonl(ver);
 178         data[6] = htonl(17);    /* IP_UDP */
 179         data[7] = 0;
 180
 181         rpc_req (PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
 182 }
 183
 184 /**************************************************************************
 185 NFS_MOUNT - Mount an NFS Filesystem
 186 **************************************************************************/
 187 static void
 188 nfs_mount_req (char *path)
 189 {
 190         uint32_t data[1024];
 191         uint32_t *p;
 192         int len;
 193         int pathlen;
 194
 195         pathlen = strlen (path);
 196
 197         p = &(data[0]);
 198         p = (uint32_t *)rpc_add_credentials((long *)p);
 199
 200         *p++ = htonl(pathlen);
 201         if (pathlen & 3) *(p + pathlen / 4) = 0;
 202         memcpy (p, path, pathlen);
 203         p += (pathlen + 3) / 4;
 204
 205         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 206
 207         rpc_req (PROG_MOUNT, MOUNT_ADDENTRY, data, len);
 208 }
 209
 210 /**************************************************************************
 211 NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
 212 **************************************************************************/
 213 static void
 214 nfs_umountall_req (void)
 215 {
 216         uint32_t data[1024];
 217         uint32_t *p;
 218         int len;
 219
 220         if ((NfsSrvMountPort == -1) || (!fs_mounted)) {
 221                 /* Nothing mounted, nothing to umount */
 222                 return;
 223         }
 224
 225         p = &(data[0]);
 226         p = (uint32_t *)rpc_add_credentials ((long *)p);
 227
 228         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 229
 230         rpc_req (PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
 231 }
 232
 233 /***************************************************************************
 234  * NFS_READLINK (AH 2003-07-14)
 235  * This procedure is called when read of the first block fails -
 236  * this probably happens when it's a directory or a symlink
 237  * In case of successful readlink(), the dirname is manipulated,
 238  * so that inside the nfs() function a recursion can be done.
 239  **************************************************************************/
 240 static void
 241 nfs_readlink_req (void)
 242 {
 243         uint32_t data[1024];
 244         uint32_t *p;
 245         int len;
 246
 247         p = &(data[0]);
 248         p = (uint32_t *)rpc_add_credentials ((long *)p);
 249
 250         memcpy (p, filefh, NFS_FHSIZE);
 251         p += (NFS_FHSIZE / 4);
 252
 253         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 254
 255         rpc_req (PROG_NFS, NFS_READLINK, data, len);
 256 }
 257
 258 /**************************************************************************
 259 NFS_LOOKUP - Lookup Pathname
 260 **************************************************************************/
 261 static void
 262 nfs_lookup_req (char *fname)
 263 {
 264         uint32_t data[1024];
 265         uint32_t *p;
 266         int len;
 267         int fnamelen;
 268
 269         fnamelen = strlen (fname);
 270
 271         p = &(data[0]);
 272         p = (uint32_t *)rpc_add_credentials ((long *)p);
 273
 274         memcpy (p, dirfh, NFS_FHSIZE);
 275         p += (NFS_FHSIZE / 4);
 276         *p++ = htonl(fnamelen);
 277         if (fnamelen & 3) *(p + fnamelen / 4) = 0;
 278         memcpy (p, fname, fnamelen);
 279         p += (fnamelen + 3) / 4;
 280
 281         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 282
 283         rpc_req (PROG_NFS, NFS_LOOKUP, data, len);
 284 }
 285
 286 /**************************************************************************
 287 NFS_READ - Read File on NFS Server
 288 **************************************************************************/
 289 static void
 290 nfs_read_req (int offset, int readlen)
 291 {
 292         uint32_t data[1024];
 293         uint32_t *p;
 294         int len;
 295
 296         p = &(data[0]);
 297         p = (uint32_t *)rpc_add_credentials ((long *)p);
 298
 299         memcpy (p, filefh, NFS_FHSIZE);
 300         p += (NFS_FHSIZE / 4);
 301         *p++ = htonl(offset);
 302         *p++ = htonl(readlen);
 303         *p++ = 0;
 304
 305         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 306
 307         rpc_req (PROG_NFS, NFS_READ, data, len);
 308 }
 309
 310 /**************************************************************************
 311 RPC request dispatcher
 312 **************************************************************************/
 313
 314 static void
 315 NfsSend (void)
 316 {
 317 #ifdef NFS_DEBUG
 318         printf ("%s\n", __FUNCTION__);
 319 #endif
 320
 321         switch (NfsState) {
 322         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 323                 rpc_lookup_req (PROG_MOUNT, 1);
 324                 break;
 325         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 326                 rpc_lookup_req (PROG_NFS, 2);
 327                 break;
 328         case STATE_MOUNT_REQ:
 329                 nfs_mount_req (nfs_path);
 330                 break;
 331         case STATE_UMOUNT_REQ:
 332                 nfs_umountall_req ();
 333                 break;
 334         case STATE_LOOKUP_REQ:
 335                 nfs_lookup_req (nfs_filename);
 336                 break;
 337         case STATE_READ_REQ:
 338                 nfs_read_req (nfs_offset, nfs_len);
 339                 break;
 340         case STATE_READLINK_REQ:
 341                 nfs_readlink_req ();
 342                 break;
 343         }
 344 }
 345
 346 /**************************************************************************
 347 Handlers for the reply from server
 348 **************************************************************************/
 349
 350 static int
 351 rpc_lookup_reply (int prog, uchar *pkt, unsigned len)
 352 {
 353         struct rpc_t rpc_pkt;
 354
 355         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 356
 357 #ifdef NFS_DEBUG
 358         printf ("%s\n", __FUNCTION__);
 359 #endif
 360
 361         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 362                 return -1;
 363
 364         if (rpc_pkt.u.reply.rstatus  ||
 365             rpc_pkt.u.reply.verifier ||
 366             rpc_pkt.u.reply.astatus  ||
 367             rpc_pkt.u.reply.astatus) {
 368                 return -1;
 369         }
 370
 371         switch (prog) {
 372         case PROG_MOUNT:
 373                 NfsSrvMountPort = ntohl(rpc_pkt.u.reply.data[0]);
 374                 break;
 375         case PROG_NFS:
 376                 NfsSrvNfsPort = ntohl(rpc_pkt.u.reply.data[0]);
 377                 break;
 378         }
 379
 380         return 0;
 381 }
 382
 383 static int
 384 nfs_mount_reply (uchar *pkt, unsigned len)
 385 {
 386         struct rpc_t rpc_pkt;
 387
 388 #ifdef NFS_DEBUG
 389         printf ("%s\n", __FUNCTION__);
 390 #endif
 391
 392         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 393
 394         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 395                 return -1;
 396
 397         if (rpc_pkt.u.reply.rstatus  ||
 398             rpc_pkt.u.reply.verifier ||
 399             rpc_pkt.u.reply.astatus  ||
 400             rpc_pkt.u.reply.data[0]) {
 401                 return -1;
 402         }
 403
 404         fs_mounted = 1;
 405         memcpy (dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 406
 407         return 0;
 408 }
 409
 410 static int
 411 nfs_umountall_reply (uchar *pkt, unsigned len)
 412 {
 413         struct rpc_t rpc_pkt;
 414
 415 #ifdef NFS_DEBUG
 416         printf ("%s\n", __FUNCTION__);
 417 #endif
 418
 419         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 420
 421         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 422                 return -1;
 423
 424         if (rpc_pkt.u.reply.rstatus  ||
 425             rpc_pkt.u.reply.verifier ||
 426             rpc_pkt.u.reply.astatus) {
 427                 return -1;
 428         }
 429
 430         fs_mounted = 0;
 431         memset (dirfh, 0, sizeof(dirfh));
 432
 433         return 0;
 434 }
 435
 436 static int
 437 nfs_lookup_reply (uchar *pkt, unsigned len)
 438 {
 439         struct rpc_t rpc_pkt;
 440
 441 #ifdef NFS_DEBUG
 442         printf ("%s\n", __FUNCTION__);
 443 #endif
 444
 445         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 446
 447         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 448                 return -1;
 449
 450         if (rpc_pkt.u.reply.rstatus  ||
 451             rpc_pkt.u.reply.verifier ||
 452             rpc_pkt.u.reply.astatus  ||
 453             rpc_pkt.u.reply.data[0]) {
 454                 return -1;
 455         }
 456
 457         memcpy (filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 458
 459         return 0;
 460 }
 461
 462 static int
 463 nfs_readlink_reply (uchar *pkt, unsigned len)
 464 {
 465         struct rpc_t rpc_pkt;
 466         int rlen;
 467
 468 #ifdef NFS_DEBUG
 469         printf ("%s\n", __FUNCTION__);
 470 #endif
 471
 472         memcpy ((unsigned char *)&rpc_pkt, pkt, len);
 473
 474         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 475                 return -1;
 476
 477         if (rpc_pkt.u.reply.rstatus  ||
 478             rpc_pkt.u.reply.verifier ||
 479             rpc_pkt.u.reply.astatus  ||
 480             rpc_pkt.u.reply.data[0]) {
 481                 return -1;
 482         }
 483
 484         rlen = ntohl (rpc_pkt.u.reply.data[1]); /* new path length */
 485
 486         if (*((char *)&(rpc_pkt.u.reply.data[2])) != '/') {
 487                 int pathlen;
 488                 strcat (nfs_path, "/");
 489                 pathlen = strlen(nfs_path);
 490                 memcpy (nfs_path+pathlen, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
 491                 nfs_path[pathlen+rlen+1] = 0;
 492         } else {
 493                 memcpy (nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
 494                 nfs_path[rlen] = 0;
 495         }
 496         return 0;
 497 }
 498
 499 static int
 500 nfs_read_reply (uchar *pkt, unsigned len)
 501 {
 502         struct rpc_t rpc_pkt;
 503         int rlen;
 504
 505 #ifdef NFS_DEBUG_nop
 506         printf ("%s\n", __FUNCTION__);
 507 #endif
 508
 509         memcpy ((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));
 510
 511         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 512                 return -1;
 513
 514         if (rpc_pkt.u.reply.rstatus  ||
 515             rpc_pkt.u.reply.verifier ||
 516             rpc_pkt.u.reply.astatus  ||
 517             rpc_pkt.u.reply.data[0]) {
 518                 if (rpc_pkt.u.reply.rstatus) {
 519                         return -9999;
 520                 }
 521                 if (rpc_pkt.u.reply.astatus) {
 522                         return -9999;
 523                 }
 524                 return -ntohl(rpc_pkt.u.reply.data[0]);;
 525         }
 526
 527         if ((nfs_offset!=0) && !((nfs_offset) % (NFS_READ_SIZE/2*10*HASHES_PER_LINE))) {
 528                 puts ("\n\t ");
 529         }
 530         if (!(nfs_offset % ((NFS_READ_SIZE/2)*10))) {
 531                 putchar ('#');
 532         }
 533
 534         rlen = ntohl(rpc_pkt.u.reply.data[18]);
 535         if ( store_block ((uchar *)pkt+sizeof(rpc_pkt.u.reply), nfs_offset, rlen) )
 536                 return -9999;
 537
 538         return rlen;
 539 }
 540
 541 /**************************************************************************
 542 Interfaces of U-BOOT
 543 **************************************************************************/
 544
 545 static void
 546 NfsTimeout (void)
 547 {
 548         puts ("Timeout\n");
 549         NetState = NETLOOP_FAIL;
 550         return;
 551 }
 552
 553 static void
 554 NfsHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
 555 {
 556         int rlen;
 557
 558 #ifdef NFS_DEBUG
 559         printf ("%s\n", __FUNCTION__);
 560 #endif
 561
 562         if (dest != NfsOurPort) return;
 563
 564         switch (NfsState) {
 565         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 566                 rpc_lookup_reply (PROG_MOUNT, pkt, len);
 567                 NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
 568                 NfsSend ();
 569                 break;
 570
 571         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 572                 rpc_lookup_reply (PROG_NFS, pkt, len);
 573                 NfsState = STATE_MOUNT_REQ;
 574                 NfsSend ();
 575                 break;
 576
 577         case STATE_MOUNT_REQ:
 578                 if (nfs_mount_reply(pkt, len)) {
 579                         puts ("*** ERROR: Cannot mount\n");
 580                         /* just to be sure... */
 581                         NfsState = STATE_UMOUNT_REQ;
 582                         NfsSend ();
 583                 } else {
 584                         NfsState = STATE_LOOKUP_REQ;
 585                         NfsSend ();
 586                 }
 587                 break;
 588
 589         case STATE_UMOUNT_REQ:
 590                 if (nfs_umountall_reply(pkt, len)) {
 591                         puts ("*** ERROR: Cannot umount\n");
 592                         NetState = NETLOOP_FAIL;
 593                 } else {
 594                         puts ("\ndone\n");
 595                         NetState = NfsDownloadState;
 596                 }
 597                 break;
 598
 599         case STATE_LOOKUP_REQ:
 600                 if (nfs_lookup_reply(pkt, len)) {
 601                         puts ("*** ERROR: File lookup fail\n");
 602                         NfsState = STATE_UMOUNT_REQ;
 603                         NfsSend ();
 604                 } else {
 605                         NfsState = STATE_READ_REQ;
 606                         nfs_offset = 0;
 607                         nfs_len = NFS_READ_SIZE;
 608                         NfsSend ();
 609                 }
 610                 break;
 611
 612         case STATE_READLINK_REQ:
 613                 if (nfs_readlink_reply(pkt, len)) {
 614                         puts ("*** ERROR: Symlink fail\n");
 615                         NfsState = STATE_UMOUNT_REQ;
 616                         NfsSend ();
 617                 } else {
 618 #ifdef NFS_DEBUG
 619                         printf ("Symlink --> %s\n", nfs_path);
 620 #endif
 621                         nfs_filename = basename (nfs_path);
 622                         nfs_path     = dirname (nfs_path);
 623
 624                         NfsState = STATE_MOUNT_REQ;
 625                         NfsSend ();
 626                 }
 627                 break;
 628
 629         case STATE_READ_REQ:
 630                 rlen = nfs_read_reply (pkt, len);
 631                 NetSetTimeout (NFS_TIMEOUT * SECOND, NfsTimeout);
 632                 if (rlen > 0) {
 633                         nfs_offset += rlen;
 634                         NfsSend ();
 635                 }
 636                 else if ((rlen == -NFSERR_ISDIR)||(rlen == -NFSERR_INVAL)) {
 637                         /* symbolic link */
 638                         NfsState = STATE_READLINK_REQ;
 639                         NfsSend ();
 640                 } else {
 641                         if ( ! rlen ) NfsDownloadState = NETLOOP_SUCCESS;
 642                         NfsState = STATE_UMOUNT_REQ;
 643                         NfsSend ();
 644                 }
 645                 break;
 646         }
 647 }
 648
 649
 650 void
 651 NfsStart (char *p)
 652 {
 653 #ifdef NFS_DEBUG
 654         printf ("%s\n", __FUNCTION__);
 655 #endif
 656         NfsDownloadState = NETLOOP_FAIL;
 657
 658         NfsServerIP = NetServerIP;
 659         nfs_path = (char *)nfs_path_buff;
 660
 661         if (nfs_path == NULL) {
 662                 NetState = NETLOOP_FAIL;
 663                 puts ("*** ERROR: Fail allocate memory\n");
 664                 return;
 665         }
 666
 667         p = strchr (p, ':');
 668
 669         if (p != NULL) {
 670                 string_to_ip (BootFile, &NfsServerIP);
 671                 ++p;
 672                 strcpy (nfs_path, p);
 673         } else {
 674                 strcpy (nfs_path, BootFile);
 675         }
 676
 677         nfs_filename = basename (nfs_path);
 678         nfs_path     = dirname (nfs_path);
 679
 680 #if defined(CONFIG_NET_MULTI)
 681         printf ("Using %s device\n", eth_get_name());
 682 #endif
 683
 684         puts ("File transfer via NFS from server "); print_IPaddr (NfsServerIP);
 685         puts ("; our IP address is ");              print_IPaddr (NetOurIP);
 686
 687         /* Check if we need to send across this subnet */
 688         if (NetOurGatewayIP && NetOurSubnetMask) {
 689                 IPaddr_t OurNet     = NetOurIP    & NetOurSubnetMask;
 690                 IPaddr_t ServerNet  = NetServerIP & NetOurSubnetMask;
 691
 692                 if (OurNet != ServerNet) {
 693                         puts ("; sending through gateway ");
 694                         print_IPaddr (NetOurGatewayIP) ;
 695                 }
 696         }
 697         printf ("\nFilename '%s/%s'.", nfs_path, nfs_filename);
 698
 699         NetSetTimeout (NFS_TIMEOUT * SECOND, NfsTimeout);
 700         NetSetHandler (NfsHandler);
 701
 702         NfsTimeoutCount = 0;
 703         NfsState = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
 704
 705         /*FIX ME !!!*/
 706         NfsOurPort = 1000;
 707
 708         /* zero out server ether in case the server ip has changed */
 709         memset (NetServerEther, 0, 6);
 710
 711         NfsSend ();
 712 }
 713