net/tftp.c

   1 /*
   2  * Copyright 1994, 1995, 2000 Neil Russell.
   3  * (See License)
   4  * Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de
   5  * Copyright 2011 Comelit Group SpA,
   6  *                Luca Ceresoli <luca.ceresoli@comelit.it>
   7  */
   8
   9 #include <common.h>
  10 #include <command.h>
  11 #include <efi_loader.h>
  12 #include <env.h>
  13 #include <image.h>
  14 #include <lmb.h>
  15 #include <mapmem.h>
  16 #include <net.h>
  17 #include <net/tftp.h>
  18 #include "bootp.h"
  19 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
  20 #include <flash.h>
  21 #endif
  22
  23 DECLARE_GLOBAL_DATA_PTR;
  24
  25 /* Well known TFTP port # */
  26 #define WELL_KNOWN_PORT 69
  27 /* Millisecs to timeout for lost pkt */
  28 #define TIMEOUT         5000UL
  29 #ifndef CONFIG_NET_RETRY_COUNT
  30 /* # of timeouts before giving up */
  31 # define TIMEOUT_COUNT  10
  32 #else
  33 # define TIMEOUT_COUNT  (CONFIG_NET_RETRY_COUNT * 2)
  34 #endif
  35 /* Number of "loading" hashes per line (for checking the image size) */
  36 #define HASHES_PER_LINE 65
  37
  38 /*
  39  *      TFTP operations.
  40  */
  41 #define TFTP_RRQ        1
  42 #define TFTP_WRQ        2
  43 #define TFTP_DATA       3
  44 #define TFTP_ACK        4
  45 #define TFTP_ERROR      5
  46 #define TFTP_OACK       6
  47
  48 static ulong timeout_ms = TIMEOUT;
  49 static int timeout_count_max = TIMEOUT_COUNT;
  50 static ulong time_start;   /* Record time we started tftp */
  51
  52 /*
  53  * These globals govern the timeout behavior when attempting a connection to a
  54  * TFTP server. tftp_timeout_ms specifies the number of milliseconds to
  55  * wait for the server to respond to initial connection. Second global,
  56  * tftp_timeout_count_max, gives the number of such connection retries.
  57  * tftp_timeout_count_max must be non-negative and tftp_timeout_ms must be
  58  * positive. The globals are meant to be set (and restored) by code needing
  59  * non-standard timeout behavior when initiating a TFTP transfer.
  60  */
  61 ulong tftp_timeout_ms = TIMEOUT;
  62 int tftp_timeout_count_max = TIMEOUT_COUNT;
  63
  64 enum {
  65         TFTP_ERR_UNDEFINED           = 0,
  66         TFTP_ERR_FILE_NOT_FOUND      = 1,
  67         TFTP_ERR_ACCESS_DENIED       = 2,
  68         TFTP_ERR_DISK_FULL           = 3,
  69         TFTP_ERR_UNEXPECTED_OPCODE   = 4,
  70         TFTP_ERR_UNKNOWN_TRANSFER_ID  = 5,
  71         TFTP_ERR_FILE_ALREADY_EXISTS = 6,
  72 };
  73
  74 static struct in_addr tftp_remote_ip;
  75 /* The UDP port at their end */
  76 static int      tftp_remote_port;
  77 /* The UDP port at our end */
  78 static int      tftp_our_port;
  79 static int      timeout_count;
  80 /* packet sequence number */
  81 static ulong    tftp_cur_block;
  82 /* last packet sequence number received */
  83 static ulong    tftp_prev_block;
  84 /* count of sequence number wraparounds */
  85 static ulong    tftp_block_wrap;
  86 /* memory offset due to wrapping */
  87 static ulong    tftp_block_wrap_offset;
  88 static int      tftp_state;
  89 static ulong    tftp_load_addr;
  90 #ifdef CONFIG_LMB
  91 static ulong    tftp_load_size;
  92 #endif
  93 #ifdef CONFIG_TFTP_TSIZE
  94 /* The file size reported by the server */
  95 static int      tftp_tsize;
  96 /* The number of hashes we printed */
  97 static short    tftp_tsize_num_hash;
  98 #endif
  99 #ifdef CONFIG_CMD_TFTPPUT
 100 /* 1 if writing, else 0 */
 101 static int      tftp_put_active;
 102 /* 1 if we have sent the last block */
 103 static int      tftp_put_final_block_sent;
 104 #else
 105 #define tftp_put_active 0
 106 #endif
 107
 108 #define STATE_SEND_RRQ  1
 109 #define STATE_DATA      2
 110 #define STATE_TOO_LARGE 3
 111 #define STATE_BAD_MAGIC 4
 112 #define STATE_OACK      5
 113 #define STATE_RECV_WRQ  6
 114 #define STATE_SEND_WRQ  7
 115
 116 /* default TFTP block size */
 117 #define TFTP_BLOCK_SIZE         512
 118 /* sequence number is 16 bit */
 119 #define TFTP_SEQUENCE_SIZE      ((ulong)(1<<16))
 120
 121 #define DEFAULT_NAME_LEN        (8 + 4 + 1)
 122 static char default_filename[DEFAULT_NAME_LEN];
 123
 124 #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
 125 #define MAX_LEN 128
 126 #else
 127 #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
 128 #endif
 129
 130 static char tftp_filename[MAX_LEN];
 131
 132 /* 512 is poor choice for ethernet, MTU is typically 1500.
 133  * Minus eth.hdrs thats 1468.  Can get 2x better throughput with
 134  * almost-MTU block sizes.  At least try... fall back to 512 if need be.
 135  * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
 136  */
 137
 138 static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
 139 static unsigned short tftp_block_size_option = CONFIG_TFTP_BLOCKSIZE;
 140
 141 static inline int store_block(int block, uchar *src, unsigned int len)
 142 {
 143         ulong offset = block * tftp_block_size + tftp_block_wrap_offset;
 144         ulong newsize = offset + len;
 145         ulong store_addr = tftp_load_addr + offset;
 146 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
 147         int i, rc = 0;
 148
 149         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 150                 /* start address in flash? */
 151                 if (flash_info[i].flash_id == FLASH_UNKNOWN)
 152                         continue;
 153                 if (store_addr >= flash_info[i].start[0]) {
 154                         rc = 1;
 155                         break;
 156                 }
 157         }
 158
 159         if (rc) { /* Flash is destination for this packet */
 160                 rc = flash_write((char *)src, store_addr, len);
 161                 if (rc) {
 162                         flash_perror(rc);
 163                         return rc;
 164                 }
 165         } else
 166 #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
 167         {
 168                 void *ptr;
 169
 170 #ifdef CONFIG_LMB
 171                 ulong end_addr = tftp_load_addr + tftp_load_size;
 172
 173                 if (!end_addr)
 174                         end_addr = ULONG_MAX;
 175
 176                 if (store_addr < tftp_load_addr ||
 177                     store_addr + len > end_addr) {
 178                         puts("\nTFTP error: ");
 179                         puts("trying to overwrite reserved memory...\n");
 180                         return -1;
 181                 }
 182 #endif
 183                 ptr = map_sysmem(store_addr, len);
 184                 memcpy(ptr, src, len);
 185                 unmap_sysmem(ptr);
 186         }
 187
 188         if (net_boot_file_size < newsize)
 189                 net_boot_file_size = newsize;
 190
 191         return 0;
 192 }
 193
 194 /* Clear our state ready for a new transfer */
 195 static void new_transfer(void)
 196 {
 197         tftp_prev_block = 0;
 198         tftp_block_wrap = 0;
 199         tftp_block_wrap_offset = 0;
 200 #ifdef CONFIG_CMD_TFTPPUT
 201         tftp_put_final_block_sent = 0;
 202 #endif
 203 }
 204
 205 #ifdef CONFIG_CMD_TFTPPUT
 206 /**
 207  * Load the next block from memory to be sent over tftp.
 208  *
 209  * @param block Block number to send
 210  * @param dst   Destination buffer for data
 211  * @param len   Number of bytes in block (this one and every other)
 212  * @return number of bytes loaded
 213  */
 214 static int load_block(unsigned block, uchar *dst, unsigned len)
 215 {
 216         /* We may want to get the final block from the previous set */
 217         ulong offset = ((int)block - 1) * len + tftp_block_wrap_offset;
 218         ulong tosend = len;
 219
 220         tosend = min(net_boot_file_size - offset, tosend);
 221         (void)memcpy(dst, (void *)(image_save_addr + offset), tosend);
 222         debug("%s: block=%u, offset=%lu, len=%u, tosend=%lu\n", __func__,
 223               block, offset, len, tosend);
 224         return tosend;
 225 }
 226 #endif
 227
 228 static void tftp_send(void);
 229 static void tftp_timeout_handler(void);
 230
 231 /**********************************************************************/
 232
 233 static void show_block_marker(void)
 234 {
 235 #ifdef CONFIG_TFTP_TSIZE
 236         if (tftp_tsize) {
 237                 ulong pos = tftp_cur_block * tftp_block_size +
 238                         tftp_block_wrap_offset;
 239                 if (pos > tftp_tsize)
 240                         pos = tftp_tsize;
 241
 242                 while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
 243                         putc('#');
 244                         tftp_tsize_num_hash++;
 245                 }
 246         } else
 247 #endif
 248         {
 249                 if (((tftp_cur_block - 1) % 10) == 0)
 250                         putc('#');
 251                 else if ((tftp_cur_block % (10 * HASHES_PER_LINE)) == 0)
 252                         puts("\n\t ");
 253         }
 254 }
 255
 256 /**
 257  * restart the current transfer due to an error
 258  *
 259  * @param msg   Message to print for user
 260  */
 261 static void restart(const char *msg)
 262 {
 263         printf("\n%s; starting again\n", msg);
 264         net_start_again();
 265 }
 266
 267 /*
 268  * Check if the block number has wrapped, and update progress
 269  *
 270  * TODO: The egregious use of global variables in this file should be tidied.
 271  */
 272 static void update_block_number(void)
 273 {
 274         /*
 275          * RFC1350 specifies that the first data packet will
 276          * have sequence number 1. If we receive a sequence
 277          * number of 0 this means that there was a wrap
 278          * around of the (16 bit) counter.
 279          */
 280         if (tftp_cur_block == 0 && tftp_prev_block != 0) {
 281                 tftp_block_wrap++;
 282                 tftp_block_wrap_offset += tftp_block_size * TFTP_SEQUENCE_SIZE;
 283                 timeout_count = 0; /* we've done well, reset the timeout */
 284         } else {
 285                 show_block_marker();
 286         }
 287 }
 288
 289 /* The TFTP get or put is complete */
 290 static void tftp_complete(void)
 291 {
 292 #ifdef CONFIG_TFTP_TSIZE
 293         /* Print hash marks for the last packet received */
 294         while (tftp_tsize && tftp_tsize_num_hash < 49) {
 295                 putc('#');
 296                 tftp_tsize_num_hash++;
 297         }
 298         puts("  ");
 299         print_size(tftp_tsize, "");
 300 #endif
 301         time_start = get_timer(time_start);
 302         if (time_start > 0) {
 303                 puts("\n\t ");  /* Line up with "Loading: " */
 304                 print_size(net_boot_file_size /
 305                         time_start * 1000, "/s");
 306         }
 307         puts("\ndone\n");
 308         net_set_state(NETLOOP_SUCCESS);
 309 }
 310
 311 static void tftp_send(void)
 312 {
 313         uchar *pkt;
 314         uchar *xp;
 315         int len = 0;
 316         ushort *s;
 317
 318         /*
 319          *      We will always be sending some sort of packet, so
 320          *      cobble together the packet headers now.
 321          */
 322         pkt = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
 323
 324         switch (tftp_state) {
 325         case STATE_SEND_RRQ:
 326         case STATE_SEND_WRQ:
 327                 xp = pkt;
 328                 s = (ushort *)pkt;
 329 #ifdef CONFIG_CMD_TFTPPUT
 330                 *s++ = htons(tftp_state == STATE_SEND_RRQ ? TFTP_RRQ :
 331                         TFTP_WRQ);
 332 #else
 333                 *s++ = htons(TFTP_RRQ);
 334 #endif
 335                 pkt = (uchar *)s;
 336                 strcpy((char *)pkt, tftp_filename);
 337                 pkt += strlen(tftp_filename) + 1;
 338                 strcpy((char *)pkt, "octet");
 339                 pkt += 5 /*strlen("octet")*/ + 1;
 340                 strcpy((char *)pkt, "timeout");
 341                 pkt += 7 /*strlen("timeout")*/ + 1;
 342                 sprintf((char *)pkt, "%lu", timeout_ms / 1000);
 343                 debug("send option \"timeout %s\"\n", (char *)pkt);
 344                 pkt += strlen((char *)pkt) + 1;
 345 #ifdef CONFIG_TFTP_TSIZE
 346                 pkt += sprintf((char *)pkt, "tsize%c%u%c",
 347                                 0, net_boot_file_size, 0);
 348 #endif
 349                 /* try for more effic. blk size */
 350                 pkt += sprintf((char *)pkt, "blksize%c%d%c",
 351                                 0, tftp_block_size_option, 0);
 352                 len = pkt - xp;
 353                 break;
 354
 355         case STATE_OACK:
 356
 357         case STATE_RECV_WRQ:
 358         case STATE_DATA:
 359                 xp = pkt;
 360                 s = (ushort *)pkt;
 361                 s[0] = htons(TFTP_ACK);
 362                 s[1] = htons(tftp_cur_block);
 363                 pkt = (uchar *)(s + 2);
 364 #ifdef CONFIG_CMD_TFTPPUT
 365                 if (tftp_put_active) {
 366                         int toload = tftp_block_size;
 367                         int loaded = load_block(tftp_cur_block, pkt, toload);
 368
 369                         s[0] = htons(TFTP_DATA);
 370                         pkt += loaded;
 371                         tftp_put_final_block_sent = (loaded < toload);
 372                 }
 373 #endif
 374                 len = pkt - xp;
 375                 break;
 376
 377         case STATE_TOO_LARGE:
 378                 xp = pkt;
 379                 s = (ushort *)pkt;
 380                 *s++ = htons(TFTP_ERROR);
 381                         *s++ = htons(3);
 382
 383                 pkt = (uchar *)s;
 384                 strcpy((char *)pkt, "File too large");
 385                 pkt += 14 /*strlen("File too large")*/ + 1;
 386                 len = pkt - xp;
 387                 break;
 388
 389         case STATE_BAD_MAGIC:
 390                 xp = pkt;
 391                 s = (ushort *)pkt;
 392                 *s++ = htons(TFTP_ERROR);
 393                 *s++ = htons(2);
 394                 pkt = (uchar *)s;
 395                 strcpy((char *)pkt, "File has bad magic");
 396                 pkt += 18 /*strlen("File has bad magic")*/ + 1;
 397                 len = pkt - xp;
 398                 break;
 399         }
 400
 401         net_send_udp_packet(net_server_ethaddr, tftp_remote_ip,
 402                             tftp_remote_port, tftp_our_port, len);
 403 }
 404
 405 #ifdef CONFIG_CMD_TFTPPUT
 406 static void icmp_handler(unsigned type, unsigned code, unsigned dest,
 407                          struct in_addr sip, unsigned src, uchar *pkt,
 408                          unsigned len)
 409 {
 410         if (type == ICMP_NOT_REACH && code == ICMP_NOT_REACH_PORT) {
 411                 /* Oh dear the other end has gone away */
 412                 restart("TFTP server died");
 413         }
 414 }
 415 #endif
 416
 417 static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 418                          unsigned src, unsigned len)
 419 {
 420         __be16 proto;
 421         __be16 *s;
 422         int i;
 423
 424         if (dest != tftp_our_port) {
 425                         return;
 426         }
 427         if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
 428             tftp_state != STATE_RECV_WRQ && tftp_state != STATE_SEND_WRQ)
 429                 return;
 430
 431         if (len < 2)
 432                 return;
 433         len -= 2;
 434         /* warning: don't use increment (++) in ntohs() macros!! */
 435         s = (__be16 *)pkt;
 436         proto = *s++;
 437         pkt = (uchar *)s;
 438         switch (ntohs(proto)) {
 439         case TFTP_RRQ:
 440                 break;
 441
 442         case TFTP_ACK:
 443 #ifdef CONFIG_CMD_TFTPPUT
 444                 if (tftp_put_active) {
 445                         if (tftp_put_final_block_sent) {
 446                                 tftp_complete();
 447                         } else {
 448                                 /*
 449                                  * Move to the next block. We want our block
 450                                  * count to wrap just like the other end!
 451                                  */
 452                                 int block = ntohs(*s);
 453                                 int ack_ok = (tftp_cur_block == block);
 454
 455                                 tftp_cur_block = (unsigned short)(block + 1);
 456                                 update_block_number();
 457                                 if (ack_ok)
 458                                         tftp_send(); /* Send next data block */
 459                         }
 460                 }
 461 #endif
 462                 break;
 463
 464         default:
 465                 break;
 466
 467 #ifdef CONFIG_CMD_TFTPSRV
 468         case TFTP_WRQ:
 469                 debug("Got WRQ\n");
 470                 tftp_remote_ip = sip;
 471                 tftp_remote_port = src;
 472                 tftp_our_port = 1024 + (get_timer(0) % 3072);
 473                 new_transfer();
 474                 tftp_send(); /* Send ACK(0) */
 475                 break;
 476 #endif
 477
 478         case TFTP_OACK:
 479                 debug("Got OACK: %s %s\n",
 480                       pkt, pkt + strlen((char *)pkt) + 1);
 481                 tftp_state = STATE_OACK;
 482                 tftp_remote_port = src;
 483                 /*
 484                  * Check for 'blksize' option.
 485                  * Careful: "i" is signed, "len" is unsigned, thus
 486                  * something like "len-8" may give a *huge* number
 487                  */
 488                 for (i = 0; i+8 < len; i++) {
 489                         if (strcmp((char *)pkt + i, "blksize") == 0) {
 490                                 tftp_block_size = (unsigned short)
 491                                         simple_strtoul((char *)pkt + i + 8,
 492                                                        NULL, 10);
 493                                 debug("Blocksize ack: %s, %d\n",
 494                                       (char *)pkt + i + 8, tftp_block_size);
 495                         }
 496 #ifdef CONFIG_TFTP_TSIZE
 497                         if (strcmp((char *)pkt+i, "tsize") == 0) {
 498                                 tftp_tsize = simple_strtoul((char *)pkt + i + 6,
 499                                                            NULL, 10);
 500                                 debug("size = %s, %d\n",
 501                                       (char *)pkt + i + 6, tftp_tsize);
 502                         }
 503 #endif
 504                 }
 505 #ifdef CONFIG_CMD_TFTPPUT
 506                 if (tftp_put_active) {
 507                         /* Get ready to send the first block */
 508                         tftp_state = STATE_DATA;
 509                         tftp_cur_block++;
 510                 }
 511 #endif
 512                 tftp_send(); /* Send ACK or first data block */
 513                 break;
 514         case TFTP_DATA:
 515                 if (len < 2)
 516                         return;
 517                 len -= 2;
 518                 tftp_cur_block = ntohs(*(__be16 *)pkt);
 519
 520                 update_block_number();
 521
 522                 if (tftp_state == STATE_SEND_RRQ)
 523                         debug("Server did not acknowledge timeout option!\n");
 524
 525                 if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
 526                     tftp_state == STATE_RECV_WRQ) {
 527                         /* first block received */
 528                         tftp_state = STATE_DATA;
 529                         tftp_remote_port = src;
 530                         new_transfer();
 531
 532                         if (tftp_cur_block != 1) {      /* Assertion */
 533                                 puts("\nTFTP error: ");
 534                                 printf("First block is not block 1 (%ld)\n",
 535                                        tftp_cur_block);
 536                                 puts("Starting again\n\n");
 537                                 net_start_again();
 538                                 break;
 539                         }
 540                 }
 541
 542                 if (tftp_cur_block == tftp_prev_block) {
 543                         /* Same block again; ignore it. */
 544                         break;
 545                 }
 546
 547                 tftp_prev_block = tftp_cur_block;
 548                 timeout_count_max = tftp_timeout_count_max;
 549                 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 550
 551                 if (store_block(tftp_cur_block - 1, pkt + 2, len)) {
 552                         eth_halt();
 553                         net_set_state(NETLOOP_FAIL);
 554                         break;
 555                 }
 556
 557                 /*
 558                  *      Acknowledge the block just received, which will prompt
 559                  *      the remote for the next one.
 560                  */
 561                 tftp_send();
 562
 563                 if (len < tftp_block_size)
 564                         tftp_complete();
 565                 break;
 566
 567         case TFTP_ERROR:
 568                 printf("\nTFTP error: '%s' (%d)\n",
 569                        pkt + 2, ntohs(*(__be16 *)pkt));
 570
 571                 switch (ntohs(*(__be16 *)pkt)) {
 572                 case TFTP_ERR_FILE_NOT_FOUND:
 573                 case TFTP_ERR_ACCESS_DENIED:
 574                         puts("Not retrying...\n");
 575                         eth_halt();
 576                         net_set_state(NETLOOP_FAIL);
 577                         break;
 578                 case TFTP_ERR_UNDEFINED:
 579                 case TFTP_ERR_DISK_FULL:
 580                 case TFTP_ERR_UNEXPECTED_OPCODE:
 581                 case TFTP_ERR_UNKNOWN_TRANSFER_ID:
 582                 case TFTP_ERR_FILE_ALREADY_EXISTS:
 583                 default:
 584                         puts("Starting again\n\n");
 585                         net_start_again();
 586                         break;
 587                 }
 588                 break;
 589         }
 590 }
 591
 592
 593 static void tftp_timeout_handler(void)
 594 {
 595         if (++timeout_count > timeout_count_max) {
 596                 restart("Retry count exceeded");
 597         } else {
 598                 puts("T ");
 599                 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 600                 if (tftp_state != STATE_RECV_WRQ)
 601                         tftp_send();
 602         }
 603 }
 604
 605 /* Initialize tftp_load_addr and tftp_load_size from image_load_addr and lmb */
 606 static int tftp_init_load_addr(void)
 607 {
 608 #ifdef CONFIG_LMB
 609         struct lmb lmb;
 610         phys_size_t max_size;
 611
 612         lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
 613
 614         max_size = lmb_get_free_size(&lmb, image_load_addr);
 615         if (!max_size)
 616                 return -1;
 617
 618         tftp_load_size = max_size;
 619 #endif
 620         tftp_load_addr = image_load_addr;
 621         return 0;
 622 }
 623
 624 void tftp_start(enum proto_t protocol)
 625 {
 626 #if CONFIG_NET_TFTP_VARS
 627         char *ep;             /* Environment pointer */
 628
 629         /*
 630          * Allow the user to choose TFTP blocksize and timeout.
 631          * TFTP protocol has a minimal timeout of 1 second.
 632          */
 633
 634         ep = env_get("tftpblocksize");
 635         if (ep != NULL)
 636                 tftp_block_size_option = simple_strtol(ep, NULL, 10);
 637
 638         ep = env_get("tftptimeout");
 639         if (ep != NULL)
 640                 timeout_ms = simple_strtol(ep, NULL, 10);
 641
 642         if (timeout_ms < 1000) {
 643                 printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
 644                        timeout_ms);
 645                 timeout_ms = 1000;
 646         }
 647
 648         ep = env_get("tftptimeoutcountmax");
 649         if (ep != NULL)
 650                 tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
 651
 652         if (tftp_timeout_count_max < 0) {
 653                 printf("TFTP timeout count max (%d ms) negative, set to 0\n",
 654                        tftp_timeout_count_max);
 655                 tftp_timeout_count_max = 0;
 656         }
 657 #endif
 658
 659         debug("TFTP blocksize = %i, timeout = %ld ms\n",
 660               tftp_block_size_option, timeout_ms);
 661
 662         tftp_remote_ip = net_server_ip;
 663         if (!net_parse_bootfile(&tftp_remote_ip, tftp_filename, MAX_LEN)) {
 664                 sprintf(default_filename, "%02X%02X%02X%02X.img",
 665                         net_ip.s_addr & 0xFF,
 666                         (net_ip.s_addr >>  8) & 0xFF,
 667                         (net_ip.s_addr >> 16) & 0xFF,
 668                         (net_ip.s_addr >> 24) & 0xFF);
 669
 670                 strncpy(tftp_filename, default_filename, DEFAULT_NAME_LEN);
 671                 tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
 672
 673                 printf("*** Warning: no boot file name; using '%s'\n",
 674                        tftp_filename);
 675         }
 676
 677         printf("Using %s device\n", eth_get_name());
 678         printf("TFTP %s server %pI4; our IP address is %pI4",
 679 #ifdef CONFIG_CMD_TFTPPUT
 680                protocol == TFTPPUT ? "to" : "from",
 681 #else
 682                "from",
 683 #endif
 684                &tftp_remote_ip, &net_ip);
 685
 686         /* Check if we need to send across this subnet */
 687         if (net_gateway.s_addr && net_netmask.s_addr) {
 688                 struct in_addr our_net;
 689                 struct in_addr remote_net;
 690
 691                 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
 692                 remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
 693                 if (our_net.s_addr != remote_net.s_addr)
 694                         printf("; sending through gateway %pI4", &net_gateway);
 695         }
 696         putc('\n');
 697
 698         printf("Filename '%s'.", tftp_filename);
 699
 700         if (net_boot_file_expected_size_in_blocks) {
 701                 printf(" Size is 0x%x Bytes = ",
 702                        net_boot_file_expected_size_in_blocks << 9);
 703                 print_size(net_boot_file_expected_size_in_blocks << 9, "");
 704         }
 705
 706         putc('\n');
 707 #ifdef CONFIG_CMD_TFTPPUT
 708         tftp_put_active = (protocol == TFTPPUT);
 709         if (tftp_put_active) {
 710                 printf("Save address: 0x%lx\n", image_save_addr);
 711                 printf("Save size:    0x%lx\n", image_save_size);
 712                 net_boot_file_size = image_save_size;
 713                 puts("Saving: *\b");
 714                 tftp_state = STATE_SEND_WRQ;
 715                 new_transfer();
 716         } else
 717 #endif
 718         {
 719                 if (tftp_init_load_addr()) {
 720                         eth_halt();
 721                         net_set_state(NETLOOP_FAIL);
 722                         puts("\nTFTP error: ");
 723                         puts("trying to overwrite reserved memory...\n");
 724                         return;
 725                 }
 726                 printf("Load address: 0x%lx\n", tftp_load_addr);
 727                 puts("Loading: *\b");
 728                 tftp_state = STATE_SEND_RRQ;
 729 #ifdef CONFIG_CMD_BOOTEFI
 730                 efi_set_bootdev("Net", "", tftp_filename);
 731 #endif
 732         }
 733
 734         time_start = get_timer(0);
 735         timeout_count_max = tftp_timeout_count_max;
 736
 737         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 738         net_set_udp_handler(tftp_handler);
 739 #ifdef CONFIG_CMD_TFTPPUT
 740         net_set_icmp_handler(icmp_handler);
 741 #endif
 742         tftp_remote_port = WELL_KNOWN_PORT;
 743         timeout_count = 0;
 744         /* Use a pseudo-random port unless a specific port is set */
 745         tftp_our_port = 1024 + (get_timer(0) % 3072);
 746
 747 #ifdef CONFIG_TFTP_PORT
 748         ep = env_get("tftpdstp");
 749         if (ep != NULL)
 750                 tftp_remote_port = simple_strtol(ep, NULL, 10);
 751         ep = env_get("tftpsrcp");
 752         if (ep != NULL)
 753                 tftp_our_port = simple_strtol(ep, NULL, 10);
 754 #endif
 755         tftp_cur_block = 0;
 756
 757         /* zero out server ether in case the server ip has changed */
 758         memset(net_server_ethaddr, 0, 6);
 759         /* Revert tftp_block_size to dflt */
 760         tftp_block_size = TFTP_BLOCK_SIZE;
 761 #ifdef CONFIG_TFTP_TSIZE
 762         tftp_tsize = 0;
 763         tftp_tsize_num_hash = 0;
 764 #endif
 765
 766         tftp_send();
 767 }
 768
 769 #ifdef CONFIG_CMD_TFTPSRV
 770 void tftp_start_server(void)
 771 {
 772         tftp_filename[0] = 0;
 773
 774         if (tftp_init_load_addr()) {
 775                 eth_halt();
 776                 net_set_state(NETLOOP_FAIL);
 777                 puts("\nTFTP error: trying to overwrite reserved memory...\n");
 778                 return;
 779         }
 780         printf("Using %s device\n", eth_get_name());
 781         printf("Listening for TFTP transfer on %pI4\n", &net_ip);
 782         printf("Load address: 0x%lx\n", tftp_load_addr);
 783
 784         puts("Loading: *\b");
 785
 786         timeout_count_max = tftp_timeout_count_max;
 787         timeout_count = 0;
 788         timeout_ms = TIMEOUT;
 789         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 790
 791         /* Revert tftp_block_size to dflt */
 792         tftp_block_size = TFTP_BLOCK_SIZE;
 793         tftp_cur_block = 0;
 794         tftp_our_port = WELL_KNOWN_PORT;
 795
 796 #ifdef CONFIG_TFTP_TSIZE
 797         tftp_tsize = 0;
 798         tftp_tsize_num_hash = 0;
 799 #endif
 800
 801         tftp_state = STATE_RECV_WRQ;
 802         net_set_udp_handler(tftp_handler);
 803
 804         /* zero out server ether in case the server ip has changed */
 805         memset(net_server_ethaddr, 0, 6);
 806 }
 807 #endif /* CONFIG_CMD_TFTPSRV */
 808