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