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 <net.h>
  28 #include <malloc.h>
  29 #include "nfs.h"
  30 #include "bootp.h"
  31
  32 #define HASHES_PER_LINE 65      /* Number of "loading" hashes per line  */
  33 #define NFS_RETRY_COUNT 30
  34 #define NFS_TIMEOUT 2000UL
  35
  36 static int fs_mounted;
  37 static unsigned long rpc_id;
  38 static int nfs_offset = -1;
  39 static int nfs_len;
  40
  41 static char dirfh[NFS_FHSIZE];  /* file handle of directory */
  42 static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
  43
  44 static int      NfsDownloadState;
  45 static IPaddr_t NfsServerIP;
  46 static int      NfsSrvMountPort;
  47 static int      NfsSrvNfsPort;
  48 static int      NfsOurPort;
  49 static int      NfsTimeoutCount;
  50 static int      NfsState;
  51 #define STATE_PRCLOOKUP_PROG_MOUNT_REQ  1
  52 #define STATE_PRCLOOKUP_PROG_NFS_REQ    2
  53 #define STATE_MOUNT_REQ                 3
  54 #define STATE_UMOUNT_REQ                4
  55 #define STATE_LOOKUP_REQ                5
  56 #define STATE_READ_REQ                  6
  57 #define STATE_READLINK_REQ              7
  58
  59 static char default_filename[64];
  60 static char *nfs_filename;
  61 static char *nfs_path;
  62 static char nfs_path_buff[2048];
  63
  64 static inline int
  65 store_block(uchar *src, unsigned offset, unsigned len)
  66 {
  67         ulong newsize = offset + len;
  68 #ifdef CONFIG_SYS_DIRECT_FLASH_NFS
  69         int i, rc = 0;
  70
  71         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  72                 /* start address in flash? */
  73                 if (load_addr + offset >= flash_info[i].start[0]) {
  74                         rc = 1;
  75                         break;
  76                 }
  77         }
  78
  79         if (rc) { /* Flash is destination for this packet */
  80                 rc = flash_write((uchar *)src, (ulong)(load_addr+offset), len);
  81                 if (rc) {
  82                         flash_perror(rc);
  83                         return -1;
  84                 }
  85         } else
  86 #endif /* CONFIG_SYS_DIRECT_FLASH_NFS */
  87         {
  88                 (void)memcpy((void *)(load_addr + offset), src, len);
  89         }
  90
  91         if (NetBootFileXferSize < (offset+len))
  92                 NetBootFileXferSize = newsize;
  93         return 0;
  94 }
  95
  96 static char*
  97 basename(char *path)
  98 {
  99         char *fname;
 100
 101         fname = path + strlen(path) - 1;
 102         while (fname >= path) {
 103                 if (*fname == '/') {
 104                         fname++;
 105                         break;
 106                 }
 107                 fname--;
 108         }
 109         return fname;
 110 }
 111
 112 static char*
 113 dirname(char *path)
 114 {
 115         char *fname;
 116
 117         fname = basename(path);
 118         --fname;
 119         *fname = '\0';
 120         return path;
 121 }
 122
 123 /**************************************************************************
 124 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
 125 **************************************************************************/
 126 static long *rpc_add_credentials(long *p)
 127 {
 128         int hl;
 129         int hostnamelen;
 130         char hostname[256];
 131
 132         strcpy(hostname, "");
 133         hostnamelen = strlen(hostname);
 134
 135         /* Here's the executive summary on authentication requirements of the
 136          * various NFS server implementations:  Linux accepts both AUTH_NONE
 137          * and AUTH_UNIX authentication (also accepts an empty hostname field
 138          * in the AUTH_UNIX scheme).  *BSD refuses AUTH_NONE, but accepts
 139          * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
 140          * scheme).  To be safe, use AUTH_UNIX and pass the hostname if we have
 141          * it (if the BOOTP/DHCP reply didn't give one, just use an empty
 142          * hostname).  */
 143
 144         hl = (hostnamelen + 3) & ~3;
 145
 146         /* Provide an AUTH_UNIX credential.  */
 147         *p++ = htonl(1);                /* AUTH_UNIX */
 148         *p++ = htonl(hl+20);            /* auth length */
 149         *p++ = htonl(0);                /* stamp */
 150         *p++ = htonl(hostnamelen);      /* hostname string */
 151         if (hostnamelen & 3)
 152                 *(p + hostnamelen / 4) = 0; /* add zero padding */
 153         memcpy(p, hostname, hostnamelen);
 154         p += hl / 4;
 155         *p++ = 0;                       /* uid */
 156         *p++ = 0;                       /* gid */
 157         *p++ = 0;                       /* auxiliary gid list */
 158
 159         /* Provide an AUTH_NONE verifier.  */
 160         *p++ = 0;                       /* AUTH_NONE */
 161         *p++ = 0;                       /* auth length */
 162
 163         return p;
 164 }
 165
 166 /**************************************************************************
 167 RPC_LOOKUP - Lookup RPC Port numbers
 168 **************************************************************************/
 169 static void
 170 rpc_req(int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
 171 {
 172         struct rpc_t pkt;
 173         unsigned long id;
 174         uint32_t *p;
 175         int pktlen;
 176         int sport;
 177
 178         id = ++rpc_id;
 179         pkt.u.call.id = htonl(id);
 180         pkt.u.call.type = htonl(MSG_CALL);
 181         pkt.u.call.rpcvers = htonl(2);  /* use RPC version 2 */
 182         pkt.u.call.prog = htonl(rpc_prog);
 183         pkt.u.call.vers = htonl(2);     /* portmapper is version 2 */
 184         pkt.u.call.proc = htonl(rpc_proc);
 185         p = (uint32_t *)&(pkt.u.call.data);
 186
 187         if (datalen)
 188                 memcpy((char *)p, (char *)data, datalen*sizeof(uint32_t));
 189
 190         pktlen = (char *)p + datalen*sizeof(uint32_t) - (char *)&pkt;
 191
 192         memcpy((char *)NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE,
 193                 (char *)&pkt, pktlen);
 194
 195         if (rpc_prog == PROG_PORTMAP)
 196                 sport = SUNRPC_PORT;
 197         else if (rpc_prog == PROG_MOUNT)
 198                 sport = NfsSrvMountPort;
 199         else
 200                 sport = NfsSrvNfsPort;
 201
 202         NetSendUDPPacket(NetServerEther, NfsServerIP, sport, NfsOurPort,
 203                 pktlen);
 204 }
 205
 206 /**************************************************************************
 207 RPC_LOOKUP - Lookup RPC Port numbers
 208 **************************************************************************/
 209 static void
 210 rpc_lookup_req(int prog, int ver)
 211 {
 212         uint32_t data[16];
 213
 214         data[0] = 0; data[1] = 0;       /* auth credential */
 215         data[2] = 0; data[3] = 0;       /* auth verifier */
 216         data[4] = htonl(prog);
 217         data[5] = htonl(ver);
 218         data[6] = htonl(17);    /* IP_UDP */
 219         data[7] = 0;
 220
 221         rpc_req(PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
 222 }
 223
 224 /**************************************************************************
 225 NFS_MOUNT - Mount an NFS Filesystem
 226 **************************************************************************/
 227 static void
 228 nfs_mount_req(char *path)
 229 {
 230         uint32_t data[1024];
 231         uint32_t *p;
 232         int len;
 233         int pathlen;
 234
 235         pathlen = strlen(path);
 236
 237         p = &(data[0]);
 238         p = (uint32_t *)rpc_add_credentials((long *)p);
 239
 240         *p++ = htonl(pathlen);
 241         if (pathlen & 3)
 242                 *(p + pathlen / 4) = 0;
 243         memcpy(p, path, pathlen);
 244         p += (pathlen + 3) / 4;
 245
 246         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 247
 248         rpc_req(PROG_MOUNT, MOUNT_ADDENTRY, data, len);
 249 }
 250
 251 /**************************************************************************
 252 NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
 253 **************************************************************************/
 254 static void
 255 nfs_umountall_req(void)
 256 {
 257         uint32_t data[1024];
 258         uint32_t *p;
 259         int len;
 260
 261         if ((NfsSrvMountPort == -1) || (!fs_mounted))
 262                 /* Nothing mounted, nothing to umount */
 263                 return;
 264
 265         p = &(data[0]);
 266         p = (uint32_t *)rpc_add_credentials((long *)p);
 267
 268         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 269
 270         rpc_req(PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
 271 }
 272
 273 /***************************************************************************
 274  * NFS_READLINK (AH 2003-07-14)
 275  * This procedure is called when read of the first block fails -
 276  * this probably happens when it's a directory or a symlink
 277  * In case of successful readlink(), the dirname is manipulated,
 278  * so that inside the nfs() function a recursion can be done.
 279  **************************************************************************/
 280 static void
 281 nfs_readlink_req(void)
 282 {
 283         uint32_t data[1024];
 284         uint32_t *p;
 285         int len;
 286
 287         p = &(data[0]);
 288         p = (uint32_t *)rpc_add_credentials((long *)p);
 289
 290         memcpy(p, filefh, NFS_FHSIZE);
 291         p += (NFS_FHSIZE / 4);
 292
 293         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 294
 295         rpc_req(PROG_NFS, NFS_READLINK, data, len);
 296 }
 297
 298 /**************************************************************************
 299 NFS_LOOKUP - Lookup Pathname
 300 **************************************************************************/
 301 static void
 302 nfs_lookup_req(char *fname)
 303 {
 304         uint32_t data[1024];
 305         uint32_t *p;
 306         int len;
 307         int fnamelen;
 308
 309         fnamelen = strlen(fname);
 310
 311         p = &(data[0]);
 312         p = (uint32_t *)rpc_add_credentials((long *)p);
 313
 314         memcpy(p, dirfh, NFS_FHSIZE);
 315         p += (NFS_FHSIZE / 4);
 316         *p++ = htonl(fnamelen);
 317         if (fnamelen & 3)
 318                 *(p + fnamelen / 4) = 0;
 319         memcpy(p, fname, fnamelen);
 320         p += (fnamelen + 3) / 4;
 321
 322         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 323
 324         rpc_req(PROG_NFS, NFS_LOOKUP, data, len);
 325 }
 326
 327 /**************************************************************************
 328 NFS_READ - Read File on NFS Server
 329 **************************************************************************/
 330 static void
 331 nfs_read_req(int offset, int readlen)
 332 {
 333         uint32_t data[1024];
 334         uint32_t *p;
 335         int len;
 336
 337         p = &(data[0]);
 338         p = (uint32_t *)rpc_add_credentials((long *)p);
 339
 340         memcpy(p, filefh, NFS_FHSIZE);
 341         p += (NFS_FHSIZE / 4);
 342         *p++ = htonl(offset);
 343         *p++ = htonl(readlen);
 344         *p++ = 0;
 345
 346         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 347
 348         rpc_req(PROG_NFS, NFS_READ, data, len);
 349 }
 350
 351 /**************************************************************************
 352 RPC request dispatcher
 353 **************************************************************************/
 354
 355 static void
 356 NfsSend(void)
 357 {
 358         debug("%s\n", __func__);
 359
 360         switch (NfsState) {
 361         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 362                 rpc_lookup_req(PROG_MOUNT, 1);
 363                 break;
 364         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 365                 rpc_lookup_req(PROG_NFS, 2);
 366                 break;
 367         case STATE_MOUNT_REQ:
 368                 nfs_mount_req(nfs_path);
 369                 break;
 370         case STATE_UMOUNT_REQ:
 371                 nfs_umountall_req();
 372                 break;
 373         case STATE_LOOKUP_REQ:
 374                 nfs_lookup_req(nfs_filename);
 375                 break;
 376         case STATE_READ_REQ:
 377                 nfs_read_req(nfs_offset, nfs_len);
 378                 break;
 379         case STATE_READLINK_REQ:
 380                 nfs_readlink_req();
 381                 break;
 382         }
 383 }
 384
 385 /**************************************************************************
 386 Handlers for the reply from server
 387 **************************************************************************/
 388
 389 static int
 390 rpc_lookup_reply(int prog, uchar *pkt, unsigned len)
 391 {
 392         struct rpc_t rpc_pkt;
 393
 394         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 395
 396         debug("%s\n", __func__);
 397
 398         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 399                 return -1;
 400
 401         if (rpc_pkt.u.reply.rstatus  ||
 402             rpc_pkt.u.reply.verifier ||
 403             rpc_pkt.u.reply.astatus)
 404                 return -1;
 405
 406         switch (prog) {
 407         case PROG_MOUNT:
 408                 NfsSrvMountPort = ntohl(rpc_pkt.u.reply.data[0]);
 409                 break;
 410         case PROG_NFS:
 411                 NfsSrvNfsPort = ntohl(rpc_pkt.u.reply.data[0]);
 412                 break;
 413         }
 414
 415         return 0;
 416 }
 417
 418 static int
 419 nfs_mount_reply(uchar *pkt, unsigned len)
 420 {
 421         struct rpc_t rpc_pkt;
 422
 423         debug("%s\n", __func__);
 424
 425         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 426
 427         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 428                 return -1;
 429
 430         if (rpc_pkt.u.reply.rstatus  ||
 431             rpc_pkt.u.reply.verifier ||
 432             rpc_pkt.u.reply.astatus  ||
 433             rpc_pkt.u.reply.data[0])
 434                 return -1;
 435
 436         fs_mounted = 1;
 437         memcpy(dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 438
 439         return 0;
 440 }
 441
 442 static int
 443 nfs_umountall_reply(uchar *pkt, unsigned len)
 444 {
 445         struct rpc_t rpc_pkt;
 446
 447         debug("%s\n", __func__);
 448
 449         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 450
 451         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 452                 return -1;
 453
 454         if (rpc_pkt.u.reply.rstatus  ||
 455             rpc_pkt.u.reply.verifier ||
 456             rpc_pkt.u.reply.astatus)
 457                 return -1;
 458
 459         fs_mounted = 0;
 460         memset(dirfh, 0, sizeof(dirfh));
 461
 462         return 0;
 463 }
 464
 465 static int
 466 nfs_lookup_reply(uchar *pkt, unsigned len)
 467 {
 468         struct rpc_t rpc_pkt;
 469
 470         debug("%s\n", __func__);
 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         memcpy(filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 484
 485         return 0;
 486 }
 487
 488 static int
 489 nfs_readlink_reply(uchar *pkt, unsigned len)
 490 {
 491         struct rpc_t rpc_pkt;
 492         int rlen;
 493
 494         debug("%s\n", __func__);
 495
 496         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 497
 498         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 499                 return -1;
 500
 501         if (rpc_pkt.u.reply.rstatus  ||
 502             rpc_pkt.u.reply.verifier ||
 503             rpc_pkt.u.reply.astatus  ||
 504             rpc_pkt.u.reply.data[0])
 505                 return -1;
 506
 507         rlen = ntohl(rpc_pkt.u.reply.data[1]); /* new path length */
 508
 509         if (*((char *)&(rpc_pkt.u.reply.data[2])) != '/') {
 510                 int pathlen;
 511                 strcat(nfs_path, "/");
 512                 pathlen = strlen(nfs_path);
 513                 memcpy(nfs_path + pathlen, (uchar *)&(rpc_pkt.u.reply.data[2]),
 514                         rlen);
 515                 nfs_path[pathlen + rlen] = 0;
 516         } else {
 517                 memcpy(nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
 518                 nfs_path[rlen] = 0;
 519         }
 520         return 0;
 521 }
 522
 523 static int
 524 nfs_read_reply(uchar *pkt, unsigned len)
 525 {
 526         struct rpc_t rpc_pkt;
 527         int rlen;
 528
 529         debug("%s\n", __func__);
 530
 531         memcpy((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));
 532
 533         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 534                 return -1;
 535
 536         if (rpc_pkt.u.reply.rstatus  ||
 537             rpc_pkt.u.reply.verifier ||
 538             rpc_pkt.u.reply.astatus  ||
 539             rpc_pkt.u.reply.data[0]) {
 540                 if (rpc_pkt.u.reply.rstatus)
 541                         return -9999;
 542                 if (rpc_pkt.u.reply.astatus)
 543                         return -9999;
 544                 return -ntohl(rpc_pkt.u.reply.data[0]);
 545         }
 546
 547         if ((nfs_offset != 0) && !((nfs_offset) %
 548                         (NFS_READ_SIZE / 2 * 10 * HASHES_PER_LINE)))
 549                 puts("\n\t ");
 550         if (!(nfs_offset % ((NFS_READ_SIZE / 2) * 10)))
 551                 putc('#');
 552
 553         rlen = ntohl(rpc_pkt.u.reply.data[18]);
 554         if (store_block((uchar *)pkt + sizeof(rpc_pkt.u.reply),
 555                         nfs_offset, rlen))
 556                 return -9999;
 557
 558         return rlen;
 559 }
 560
 561 /**************************************************************************
 562 Interfaces of U-BOOT
 563 **************************************************************************/
 564
 565 static void
 566 NfsTimeout(void)
 567 {
 568         if (++NfsTimeoutCount > NFS_RETRY_COUNT) {
 569                 puts("\nRetry count exceeded; starting again\n");
 570                 NetStartAgain();
 571         } else {
 572                 puts("T ");
 573                 NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
 574                 NfsSend();
 575         }
 576 }
 577
 578 static void
 579 NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
 580 {
 581         int rlen;
 582
 583         debug("%s\n", __func__);
 584
 585         if (dest != NfsOurPort)
 586                 return;
 587
 588         switch (NfsState) {
 589         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 590                 rpc_lookup_reply(PROG_MOUNT, pkt, len);
 591                 NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
 592                 NfsSend();
 593                 break;
 594
 595         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 596                 rpc_lookup_reply(PROG_NFS, pkt, len);
 597                 NfsState = STATE_MOUNT_REQ;
 598                 NfsSend();
 599                 break;
 600
 601         case STATE_MOUNT_REQ:
 602                 if (nfs_mount_reply(pkt, len)) {
 603                         puts("*** ERROR: Cannot mount\n");
 604                         /* just to be sure... */
 605                         NfsState = STATE_UMOUNT_REQ;
 606                         NfsSend();
 607                 } else {
 608                         NfsState = STATE_LOOKUP_REQ;
 609                         NfsSend();
 610                 }
 611                 break;
 612
 613         case STATE_UMOUNT_REQ:
 614                 if (nfs_umountall_reply(pkt, len)) {
 615                         puts("*** ERROR: Cannot umount\n");
 616                         NetState = NETLOOP_FAIL;
 617                 } else {
 618                         puts("\ndone\n");
 619                         NetState = NfsDownloadState;
 620                 }
 621                 break;
 622
 623         case STATE_LOOKUP_REQ:
 624                 if (nfs_lookup_reply(pkt, len)) {
 625                         puts("*** ERROR: File lookup fail\n");
 626                         NfsState = STATE_UMOUNT_REQ;
 627                         NfsSend();
 628                 } else {
 629                         NfsState = STATE_READ_REQ;
 630                         nfs_offset = 0;
 631                         nfs_len = NFS_READ_SIZE;
 632                         NfsSend();
 633                 }
 634                 break;
 635
 636         case STATE_READLINK_REQ:
 637                 if (nfs_readlink_reply(pkt, len)) {
 638                         puts("*** ERROR: Symlink fail\n");
 639                         NfsState = STATE_UMOUNT_REQ;
 640                         NfsSend();
 641                 } else {
 642                         debug("Symlink --> %s\n", nfs_path);
 643                         nfs_filename = basename(nfs_path);
 644                         nfs_path     = dirname(nfs_path);
 645
 646                         NfsState = STATE_MOUNT_REQ;
 647                         NfsSend();
 648                 }
 649                 break;
 650
 651         case STATE_READ_REQ:
 652                 rlen = nfs_read_reply(pkt, len);
 653                 NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
 654                 if (rlen > 0) {
 655                         nfs_offset += rlen;
 656                         NfsSend();
 657                 } else if ((rlen == -NFSERR_ISDIR) || (rlen == -NFSERR_INVAL)) {
 658                         /* symbolic link */
 659                         NfsState = STATE_READLINK_REQ;
 660                         NfsSend();
 661                 } else {
 662                         if (!rlen)
 663                                 NfsDownloadState = NETLOOP_SUCCESS;
 664                         NfsState = STATE_UMOUNT_REQ;
 665                         NfsSend();
 666                 }
 667                 break;
 668         }
 669 }
 670
 671
 672 void
 673 NfsStart(void)
 674 {
 675         debug("%s\n", __func__);
 676         NfsDownloadState = NETLOOP_FAIL;
 677
 678         NfsServerIP = NetServerIP;
 679         nfs_path = (char *)nfs_path_buff;
 680
 681         if (nfs_path == NULL) {
 682                 NetState = NETLOOP_FAIL;
 683                 puts("*** ERROR: Fail allocate memory\n");
 684                 return;
 685         }
 686
 687         if (BootFile[0] == '\0') {
 688                 sprintf(default_filename, "/nfsroot/%02X%02X%02X%02X.img",
 689                         NetOurIP & 0xFF,
 690                         (NetOurIP >>  8) & 0xFF,
 691                         (NetOurIP >> 16) & 0xFF,
 692                         (NetOurIP >> 24) & 0xFF);
 693                 strcpy(nfs_path, default_filename);
 694
 695                 printf("*** Warning: no boot file name; using '%s'\n",
 696                         nfs_path);
 697         } else {
 698                 char *p = BootFile;
 699
 700                 p = strchr(p, ':');
 701
 702                 if (p != NULL) {
 703                         NfsServerIP = string_to_ip(BootFile);
 704                         ++p;
 705                         strcpy(nfs_path, p);
 706                 } else {
 707                         strcpy(nfs_path, BootFile);
 708                 }
 709         }
 710
 711         nfs_filename = basename(nfs_path);
 712         nfs_path     = dirname(nfs_path);
 713
 714         printf("Using %s device\n", eth_get_name());
 715
 716         printf("File transfer via NFS from server %pI4"
 717                 "; our IP address is %pI4", &NfsServerIP, &NetOurIP);
 718
 719         /* Check if we need to send across this subnet */
 720         if (NetOurGatewayIP && NetOurSubnetMask) {
 721                 IPaddr_t OurNet     = NetOurIP    & NetOurSubnetMask;
 722                 IPaddr_t ServerNet  = NetServerIP & NetOurSubnetMask;
 723
 724                 if (OurNet != ServerNet)
 725                         printf("; sending through gateway %pI4",
 726                                 &NetOurGatewayIP);
 727         }
 728         printf("\nFilename '%s/%s'.", nfs_path, nfs_filename);
 729
 730         if (NetBootFileSize) {
 731                 printf(" Size is 0x%x Bytes = ", NetBootFileSize<<9);
 732                 print_size(NetBootFileSize<<9, "");
 733         }
 734         printf("\nLoad address: 0x%lx\n"
 735                 "Loading: *\b", load_addr);
 736
 737         NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
 738         NetSetHandler(NfsHandler);
 739
 740         NfsTimeoutCount = 0;
 741         NfsState = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
 742
 743         /*NfsOurPort = 4096 + (get_ticks() % 3072);*/
 744         /*FIX ME !!!*/
 745         NfsOurPort = 1000;
 746
 747         /* zero out server ether in case the server ip has changed */
 748         memset(NetServerEther, 0, 6);
 749
 750         NfsSend();
 751 }