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 #ifndef CONFIG_NFS_TIMEOUT
  35 # define NFS_TIMEOUT 2000UL
  36 #else
  37 # define NFS_TIMEOUT CONFIG_NFS_TIMEOUT
  38 #endif
  39
  40 static int fs_mounted;
  41 static unsigned long rpc_id;
  42 static int nfs_offset = -1;
  43 static int nfs_len;
  44
  45 static char dirfh[NFS_FHSIZE];  /* file handle of directory */
  46 static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
  47
  48 static enum net_loop_state nfs_download_state;
  49 static IPaddr_t NfsServerIP;
  50 static int      NfsSrvMountPort;
  51 static int      NfsSrvNfsPort;
  52 static int      NfsOurPort;
  53 static int      NfsTimeoutCount;
  54 static int      NfsState;
  55 #define STATE_PRCLOOKUP_PROG_MOUNT_REQ  1
  56 #define STATE_PRCLOOKUP_PROG_NFS_REQ    2
  57 #define STATE_MOUNT_REQ                 3
  58 #define STATE_UMOUNT_REQ                4
  59 #define STATE_LOOKUP_REQ                5
  60 #define STATE_READ_REQ                  6
  61 #define STATE_READLINK_REQ              7
  62
  63 static char default_filename[64];
  64 static char *nfs_filename;
  65 static char *nfs_path;
  66 static char nfs_path_buff[2048];
  67
  68 static inline int
  69 store_block(uchar *src, unsigned offset, unsigned len)
  70 {
  71         ulong newsize = offset + len;
  72 #ifdef CONFIG_SYS_DIRECT_FLASH_NFS
  73         int i, rc = 0;
  74
  75         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  76                 /* start address in flash? */
  77                 if (load_addr + offset >= flash_info[i].start[0]) {
  78                         rc = 1;
  79                         break;
  80                 }
  81         }
  82
  83         if (rc) { /* Flash is destination for this packet */
  84                 rc = flash_write((uchar *)src, (ulong)(load_addr+offset), len);
  85                 if (rc) {
  86                         flash_perror(rc);
  87                         return -1;
  88                 }
  89         } else
  90 #endif /* CONFIG_SYS_DIRECT_FLASH_NFS */
  91         {
  92                 (void)memcpy((void *)(load_addr + offset), src, len);
  93         }
  94
  95         if (NetBootFileXferSize < (offset+len))
  96                 NetBootFileXferSize = newsize;
  97         return 0;
  98 }
  99
 100 static char*
 101 basename(char *path)
 102 {
 103         char *fname;
 104
 105         fname = path + strlen(path) - 1;
 106         while (fname >= path) {
 107                 if (*fname == '/') {
 108                         fname++;
 109                         break;
 110                 }
 111                 fname--;
 112         }
 113         return fname;
 114 }
 115
 116 static char*
 117 dirname(char *path)
 118 {
 119         char *fname;
 120
 121         fname = basename(path);
 122         --fname;
 123         *fname = '\0';
 124         return path;
 125 }
 126
 127 /**************************************************************************
 128 RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
 129 **************************************************************************/
 130 static long *rpc_add_credentials(long *p)
 131 {
 132         int hl;
 133         int hostnamelen;
 134         char hostname[256];
 135
 136         strcpy(hostname, "");
 137         hostnamelen = strlen(hostname);
 138
 139         /* Here's the executive summary on authentication requirements of the
 140          * various NFS server implementations:  Linux accepts both AUTH_NONE
 141          * and AUTH_UNIX authentication (also accepts an empty hostname field
 142          * in the AUTH_UNIX scheme).  *BSD refuses AUTH_NONE, but accepts
 143          * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
 144          * scheme).  To be safe, use AUTH_UNIX and pass the hostname if we have
 145          * it (if the BOOTP/DHCP reply didn't give one, just use an empty
 146          * hostname).  */
 147
 148         hl = (hostnamelen + 3) & ~3;
 149
 150         /* Provide an AUTH_UNIX credential.  */
 151         *p++ = htonl(1);                /* AUTH_UNIX */
 152         *p++ = htonl(hl+20);            /* auth length */
 153         *p++ = htonl(0);                /* stamp */
 154         *p++ = htonl(hostnamelen);      /* hostname string */
 155         if (hostnamelen & 3)
 156                 *(p + hostnamelen / 4) = 0; /* add zero padding */
 157         memcpy(p, hostname, hostnamelen);
 158         p += hl / 4;
 159         *p++ = 0;                       /* uid */
 160         *p++ = 0;                       /* gid */
 161         *p++ = 0;                       /* auxiliary gid list */
 162
 163         /* Provide an AUTH_NONE verifier.  */
 164         *p++ = 0;                       /* AUTH_NONE */
 165         *p++ = 0;                       /* auth length */
 166
 167         return p;
 168 }
 169
 170 /**************************************************************************
 171 RPC_LOOKUP - Lookup RPC Port numbers
 172 **************************************************************************/
 173 static void
 174 rpc_req(int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
 175 {
 176         struct rpc_t pkt;
 177         unsigned long id;
 178         uint32_t *p;
 179         int pktlen;
 180         int sport;
 181
 182         id = ++rpc_id;
 183         pkt.u.call.id = htonl(id);
 184         pkt.u.call.type = htonl(MSG_CALL);
 185         pkt.u.call.rpcvers = htonl(2);  /* use RPC version 2 */
 186         pkt.u.call.prog = htonl(rpc_prog);
 187         pkt.u.call.vers = htonl(2);     /* portmapper is version 2 */
 188         pkt.u.call.proc = htonl(rpc_proc);
 189         p = (uint32_t *)&(pkt.u.call.data);
 190
 191         if (datalen)
 192                 memcpy((char *)p, (char *)data, datalen*sizeof(uint32_t));
 193
 194         pktlen = (char *)p + datalen*sizeof(uint32_t) - (char *)&pkt;
 195
 196         memcpy((char *)NetTxPacket + NetEthHdrSize() + IP_UDP_HDR_SIZE,
 197                 (char *)&pkt, pktlen);
 198
 199         if (rpc_prog == PROG_PORTMAP)
 200                 sport = SUNRPC_PORT;
 201         else if (rpc_prog == PROG_MOUNT)
 202                 sport = NfsSrvMountPort;
 203         else
 204                 sport = NfsSrvNfsPort;
 205
 206         NetSendUDPPacket(NetServerEther, NfsServerIP, sport, NfsOurPort,
 207                 pktlen);
 208 }
 209
 210 /**************************************************************************
 211 RPC_LOOKUP - Lookup RPC Port numbers
 212 **************************************************************************/
 213 static void
 214 rpc_lookup_req(int prog, int ver)
 215 {
 216         uint32_t data[16];
 217
 218         data[0] = 0; data[1] = 0;       /* auth credential */
 219         data[2] = 0; data[3] = 0;       /* auth verifier */
 220         data[4] = htonl(prog);
 221         data[5] = htonl(ver);
 222         data[6] = htonl(17);    /* IP_UDP */
 223         data[7] = 0;
 224
 225         rpc_req(PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
 226 }
 227
 228 /**************************************************************************
 229 NFS_MOUNT - Mount an NFS Filesystem
 230 **************************************************************************/
 231 static void
 232 nfs_mount_req(char *path)
 233 {
 234         uint32_t data[1024];
 235         uint32_t *p;
 236         int len;
 237         int pathlen;
 238
 239         pathlen = strlen(path);
 240
 241         p = &(data[0]);
 242         p = (uint32_t *)rpc_add_credentials((long *)p);
 243
 244         *p++ = htonl(pathlen);
 245         if (pathlen & 3)
 246                 *(p + pathlen / 4) = 0;
 247         memcpy(p, path, pathlen);
 248         p += (pathlen + 3) / 4;
 249
 250         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 251
 252         rpc_req(PROG_MOUNT, MOUNT_ADDENTRY, data, len);
 253 }
 254
 255 /**************************************************************************
 256 NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
 257 **************************************************************************/
 258 static void
 259 nfs_umountall_req(void)
 260 {
 261         uint32_t data[1024];
 262         uint32_t *p;
 263         int len;
 264
 265         if ((NfsSrvMountPort == -1) || (!fs_mounted))
 266                 /* Nothing mounted, nothing to umount */
 267                 return;
 268
 269         p = &(data[0]);
 270         p = (uint32_t *)rpc_add_credentials((long *)p);
 271
 272         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 273
 274         rpc_req(PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
 275 }
 276
 277 /***************************************************************************
 278  * NFS_READLINK (AH 2003-07-14)
 279  * This procedure is called when read of the first block fails -
 280  * this probably happens when it's a directory or a symlink
 281  * In case of successful readlink(), the dirname is manipulated,
 282  * so that inside the nfs() function a recursion can be done.
 283  **************************************************************************/
 284 static void
 285 nfs_readlink_req(void)
 286 {
 287         uint32_t data[1024];
 288         uint32_t *p;
 289         int len;
 290
 291         p = &(data[0]);
 292         p = (uint32_t *)rpc_add_credentials((long *)p);
 293
 294         memcpy(p, filefh, NFS_FHSIZE);
 295         p += (NFS_FHSIZE / 4);
 296
 297         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 298
 299         rpc_req(PROG_NFS, NFS_READLINK, data, len);
 300 }
 301
 302 /**************************************************************************
 303 NFS_LOOKUP - Lookup Pathname
 304 **************************************************************************/
 305 static void
 306 nfs_lookup_req(char *fname)
 307 {
 308         uint32_t data[1024];
 309         uint32_t *p;
 310         int len;
 311         int fnamelen;
 312
 313         fnamelen = strlen(fname);
 314
 315         p = &(data[0]);
 316         p = (uint32_t *)rpc_add_credentials((long *)p);
 317
 318         memcpy(p, dirfh, NFS_FHSIZE);
 319         p += (NFS_FHSIZE / 4);
 320         *p++ = htonl(fnamelen);
 321         if (fnamelen & 3)
 322                 *(p + fnamelen / 4) = 0;
 323         memcpy(p, fname, fnamelen);
 324         p += (fnamelen + 3) / 4;
 325
 326         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 327
 328         rpc_req(PROG_NFS, NFS_LOOKUP, data, len);
 329 }
 330
 331 /**************************************************************************
 332 NFS_READ - Read File on NFS Server
 333 **************************************************************************/
 334 static void
 335 nfs_read_req(int offset, int readlen)
 336 {
 337         uint32_t data[1024];
 338         uint32_t *p;
 339         int len;
 340
 341         p = &(data[0]);
 342         p = (uint32_t *)rpc_add_credentials((long *)p);
 343
 344         memcpy(p, filefh, NFS_FHSIZE);
 345         p += (NFS_FHSIZE / 4);
 346         *p++ = htonl(offset);
 347         *p++ = htonl(readlen);
 348         *p++ = 0;
 349
 350         len = (uint32_t *)p - (uint32_t *)&(data[0]);
 351
 352         rpc_req(PROG_NFS, NFS_READ, data, len);
 353 }
 354
 355 /**************************************************************************
 356 RPC request dispatcher
 357 **************************************************************************/
 358
 359 static void
 360 NfsSend(void)
 361 {
 362         debug("%s\n", __func__);
 363
 364         switch (NfsState) {
 365         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 366                 rpc_lookup_req(PROG_MOUNT, 1);
 367                 break;
 368         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 369                 rpc_lookup_req(PROG_NFS, 2);
 370                 break;
 371         case STATE_MOUNT_REQ:
 372                 nfs_mount_req(nfs_path);
 373                 break;
 374         case STATE_UMOUNT_REQ:
 375                 nfs_umountall_req();
 376                 break;
 377         case STATE_LOOKUP_REQ:
 378                 nfs_lookup_req(nfs_filename);
 379                 break;
 380         case STATE_READ_REQ:
 381                 nfs_read_req(nfs_offset, nfs_len);
 382                 break;
 383         case STATE_READLINK_REQ:
 384                 nfs_readlink_req();
 385                 break;
 386         }
 387 }
 388
 389 /**************************************************************************
 390 Handlers for the reply from server
 391 **************************************************************************/
 392
 393 static int
 394 rpc_lookup_reply(int prog, uchar *pkt, unsigned len)
 395 {
 396         struct rpc_t rpc_pkt;
 397
 398         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 399
 400         debug("%s\n", __func__);
 401
 402         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 403                 return -1;
 404
 405         if (rpc_pkt.u.reply.rstatus  ||
 406             rpc_pkt.u.reply.verifier ||
 407             rpc_pkt.u.reply.astatus)
 408                 return -1;
 409
 410         switch (prog) {
 411         case PROG_MOUNT:
 412                 NfsSrvMountPort = ntohl(rpc_pkt.u.reply.data[0]);
 413                 break;
 414         case PROG_NFS:
 415                 NfsSrvNfsPort = ntohl(rpc_pkt.u.reply.data[0]);
 416                 break;
 417         }
 418
 419         return 0;
 420 }
 421
 422 static int
 423 nfs_mount_reply(uchar *pkt, unsigned len)
 424 {
 425         struct rpc_t rpc_pkt;
 426
 427         debug("%s\n", __func__);
 428
 429         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 430
 431         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 432                 return -1;
 433
 434         if (rpc_pkt.u.reply.rstatus  ||
 435             rpc_pkt.u.reply.verifier ||
 436             rpc_pkt.u.reply.astatus  ||
 437             rpc_pkt.u.reply.data[0])
 438                 return -1;
 439
 440         fs_mounted = 1;
 441         memcpy(dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 442
 443         return 0;
 444 }
 445
 446 static int
 447 nfs_umountall_reply(uchar *pkt, unsigned len)
 448 {
 449         struct rpc_t rpc_pkt;
 450
 451         debug("%s\n", __func__);
 452
 453         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 454
 455         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 456                 return -1;
 457
 458         if (rpc_pkt.u.reply.rstatus  ||
 459             rpc_pkt.u.reply.verifier ||
 460             rpc_pkt.u.reply.astatus)
 461                 return -1;
 462
 463         fs_mounted = 0;
 464         memset(dirfh, 0, sizeof(dirfh));
 465
 466         return 0;
 467 }
 468
 469 static int
 470 nfs_lookup_reply(uchar *pkt, unsigned len)
 471 {
 472         struct rpc_t rpc_pkt;
 473
 474         debug("%s\n", __func__);
 475
 476         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 477
 478         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 479                 return -1;
 480
 481         if (rpc_pkt.u.reply.rstatus  ||
 482             rpc_pkt.u.reply.verifier ||
 483             rpc_pkt.u.reply.astatus  ||
 484             rpc_pkt.u.reply.data[0])
 485                 return -1;
 486
 487         memcpy(filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
 488
 489         return 0;
 490 }
 491
 492 static int
 493 nfs_readlink_reply(uchar *pkt, unsigned len)
 494 {
 495         struct rpc_t rpc_pkt;
 496         int rlen;
 497
 498         debug("%s\n", __func__);
 499
 500         memcpy((unsigned char *)&rpc_pkt, pkt, len);
 501
 502         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 503                 return -1;
 504
 505         if (rpc_pkt.u.reply.rstatus  ||
 506             rpc_pkt.u.reply.verifier ||
 507             rpc_pkt.u.reply.astatus  ||
 508             rpc_pkt.u.reply.data[0])
 509                 return -1;
 510
 511         rlen = ntohl(rpc_pkt.u.reply.data[1]); /* new path length */
 512
 513         if (*((char *)&(rpc_pkt.u.reply.data[2])) != '/') {
 514                 int pathlen;
 515                 strcat(nfs_path, "/");
 516                 pathlen = strlen(nfs_path);
 517                 memcpy(nfs_path + pathlen, (uchar *)&(rpc_pkt.u.reply.data[2]),
 518                         rlen);
 519                 nfs_path[pathlen + rlen] = 0;
 520         } else {
 521                 memcpy(nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
 522                 nfs_path[rlen] = 0;
 523         }
 524         return 0;
 525 }
 526
 527 static int
 528 nfs_read_reply(uchar *pkt, unsigned len)
 529 {
 530         struct rpc_t rpc_pkt;
 531         int rlen;
 532
 533         debug("%s\n", __func__);
 534
 535         memcpy((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));
 536
 537         if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
 538                 return -1;
 539
 540         if (rpc_pkt.u.reply.rstatus  ||
 541             rpc_pkt.u.reply.verifier ||
 542             rpc_pkt.u.reply.astatus  ||
 543             rpc_pkt.u.reply.data[0]) {
 544                 if (rpc_pkt.u.reply.rstatus)
 545                         return -9999;
 546                 if (rpc_pkt.u.reply.astatus)
 547                         return -9999;
 548                 return -ntohl(rpc_pkt.u.reply.data[0]);
 549         }
 550
 551         if ((nfs_offset != 0) && !((nfs_offset) %
 552                         (NFS_READ_SIZE / 2 * 10 * HASHES_PER_LINE)))
 553                 puts("\n\t ");
 554         if (!(nfs_offset % ((NFS_READ_SIZE / 2) * 10)))
 555                 putc('#');
 556
 557         rlen = ntohl(rpc_pkt.u.reply.data[18]);
 558         if (store_block((uchar *)pkt + sizeof(rpc_pkt.u.reply),
 559                         nfs_offset, rlen))
 560                 return -9999;
 561
 562         return rlen;
 563 }
 564
 565 /**************************************************************************
 566 Interfaces of U-BOOT
 567 **************************************************************************/
 568
 569 static void
 570 NfsTimeout(void)
 571 {
 572         if (++NfsTimeoutCount > NFS_RETRY_COUNT) {
 573                 puts("\nRetry count exceeded; starting again\n");
 574                 NetStartAgain();
 575         } else {
 576                 puts("T ");
 577                 NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
 578                 NfsSend();
 579         }
 580 }
 581
 582 static void
 583 NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
 584 {
 585         int rlen;
 586
 587         debug("%s\n", __func__);
 588
 589         if (dest != NfsOurPort)
 590                 return;
 591
 592         switch (NfsState) {
 593         case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
 594                 rpc_lookup_reply(PROG_MOUNT, pkt, len);
 595                 NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
 596                 NfsSend();
 597                 break;
 598
 599         case STATE_PRCLOOKUP_PROG_NFS_REQ:
 600                 rpc_lookup_reply(PROG_NFS, pkt, len);
 601                 NfsState = STATE_MOUNT_REQ;
 602                 NfsSend();
 603                 break;
 604
 605         case STATE_MOUNT_REQ:
 606                 if (nfs_mount_reply(pkt, len)) {
 607                         puts("*** ERROR: Cannot mount\n");
 608                         /* just to be sure... */
 609                         NfsState = STATE_UMOUNT_REQ;
 610                         NfsSend();
 611                 } else {
 612                         NfsState = STATE_LOOKUP_REQ;
 613                         NfsSend();
 614                 }
 615                 break;
 616
 617         case STATE_UMOUNT_REQ:
 618                 if (nfs_umountall_reply(pkt, len)) {
 619                         puts("*** ERROR: Cannot umount\n");
 620                         net_set_state(NETLOOP_FAIL);
 621                 } else {
 622                         puts("\ndone\n");
 623                         net_set_state(nfs_download_state);
 624                 }
 625                 break;
 626
 627         case STATE_LOOKUP_REQ:
 628                 if (nfs_lookup_reply(pkt, len)) {
 629                         puts("*** ERROR: File lookup fail\n");
 630                         NfsState = STATE_UMOUNT_REQ;
 631                         NfsSend();
 632                 } else {
 633                         NfsState = STATE_READ_REQ;
 634                         nfs_offset = 0;
 635                         nfs_len = NFS_READ_SIZE;
 636                         NfsSend();
 637                 }
 638                 break;
 639
 640         case STATE_READLINK_REQ:
 641                 if (nfs_readlink_reply(pkt, len)) {
 642                         puts("*** ERROR: Symlink fail\n");
 643                         NfsState = STATE_UMOUNT_REQ;
 644                         NfsSend();
 645                 } else {
 646                         debug("Symlink --> %s\n", nfs_path);
 647                         nfs_filename = basename(nfs_path);
 648                         nfs_path     = dirname(nfs_path);
 649
 650                         NfsState = STATE_MOUNT_REQ;
 651                         NfsSend();
 652                 }
 653                 break;
 654
 655         case STATE_READ_REQ:
 656                 rlen = nfs_read_reply(pkt, len);
 657                 NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
 658                 if (rlen > 0) {
 659                         nfs_offset += rlen;
 660                         NfsSend();
 661                 } else if ((rlen == -NFSERR_ISDIR) || (rlen == -NFSERR_INVAL)) {
 662                         /* symbolic link */
 663                         NfsState = STATE_READLINK_REQ;
 664                         NfsSend();
 665                 } else {
 666                         if (!rlen)
 667                                 nfs_download_state = NETLOOP_SUCCESS;
 668                         NfsState = STATE_UMOUNT_REQ;
 669                         NfsSend();
 670                 }
 671                 break;
 672         }
 673 }
 674
 675
 676 void
 677 NfsStart(void)
 678 {
 679         debug("%s\n", __func__);
 680         nfs_download_state = NETLOOP_FAIL;
 681
 682         NfsServerIP = NetServerIP;
 683         nfs_path = (char *)nfs_path_buff;
 684
 685         if (nfs_path == NULL) {
 686                 net_set_state(NETLOOP_FAIL);
 687                 puts("*** ERROR: Fail allocate memory\n");
 688                 return;
 689         }
 690
 691         if (BootFile[0] == '\0') {
 692                 sprintf(default_filename, "/nfsroot/%02X%02X%02X%02X.img",
 693                         NetOurIP & 0xFF,
 694                         (NetOurIP >>  8) & 0xFF,
 695                         (NetOurIP >> 16) & 0xFF,
 696                         (NetOurIP >> 24) & 0xFF);
 697                 strcpy(nfs_path, default_filename);
 698
 699                 printf("*** Warning: no boot file name; using '%s'\n",
 700                         nfs_path);
 701         } else {
 702                 char *p = BootFile;
 703
 704                 p = strchr(p, ':');
 705
 706                 if (p != NULL) {
 707                         NfsServerIP = string_to_ip(BootFile);
 708                         ++p;
 709                         strcpy(nfs_path, p);
 710                 } else {
 711                         strcpy(nfs_path, BootFile);
 712                 }
 713         }
 714
 715         nfs_filename = basename(nfs_path);
 716         nfs_path     = dirname(nfs_path);
 717
 718         printf("Using %s device\n", eth_get_name());
 719
 720         printf("File transfer via NFS from server %pI4"
 721                 "; our IP address is %pI4", &NfsServerIP, &NetOurIP);
 722
 723         /* Check if we need to send across this subnet */
 724         if (NetOurGatewayIP && NetOurSubnetMask) {
 725                 IPaddr_t OurNet     = NetOurIP    & NetOurSubnetMask;
 726                 IPaddr_t ServerNet  = NetServerIP & NetOurSubnetMask;
 727
 728                 if (OurNet != ServerNet)
 729                         printf("; sending through gateway %pI4",
 730                                 &NetOurGatewayIP);
 731         }
 732         printf("\nFilename '%s/%s'.", nfs_path, nfs_filename);
 733
 734         if (NetBootFileSize) {
 735                 printf(" Size is 0x%x Bytes = ", NetBootFileSize<<9);
 736                 print_size(NetBootFileSize<<9, "");
 737         }
 738         printf("\nLoad address: 0x%lx\n"
 739                 "Loading: *\b", load_addr);
 740
 741         NetSetTimeout(NFS_TIMEOUT, NfsTimeout);
 742         net_set_udp_handler(NfsHandler);
 743
 744         NfsTimeoutCount = 0;
 745         NfsState = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
 746
 747         /*NfsOurPort = 4096 + (get_ticks() % 3072);*/
 748         /*FIX ME !!!*/
 749         NfsOurPort = 1000;
 750
 751         /* zero out server ether in case the server ip has changed */
 752         memset(NetServerEther, 0, 6);
 753
 754         NfsSend();
 755 }