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 <mapmem.h>
  15 #include <net.h>
  16 #include <net/tftp.h>
  17 #include "bootp.h"
  18 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
  19 #include <flash.h>
  20 #endif
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 /* Well known TFTP port # */
  25 #define WELL_KNOWN_PORT 69
  26 /* Millisecs to timeout for lost pkt */
  27 #define TIMEOUT         5000UL
  28 #ifndef CONFIG_NET_RETRY_COUNT
  29 /* # of timeouts before giving up */
  30 # define TIMEOUT_COUNT  10
  31 #else
  32 # define TIMEOUT_COUNT  (CONFIG_NET_RETRY_COUNT * 2)
  33 #endif
  34 /* Number of "loading" hashes per line (for checking the image size) */
  35 #define HASHES_PER_LINE 65
  36
  37 /*
  38  *      TFTP operations.
  39  */
  40 #define TFTP_RRQ        1
  41 #define TFTP_WRQ        2
  42 #define TFTP_DATA       3
  43 #define TFTP_ACK        4
  44 #define TFTP_ERROR      5
  45 #define TFTP_OACK       6
  46
  47 static ulong timeout_ms = TIMEOUT;
  48 static int timeout_count_max = TIMEOUT_COUNT;
  49 static ulong time_start;   /* Record time we started tftp */
  50
  51 /*
  52  * These globals govern the timeout behavior when attempting a connection to a
  53  * TFTP server. tftp_timeout_ms specifies the number of milliseconds to
  54  * wait for the server to respond to initial connection. Second global,
  55  * tftp_timeout_count_max, gives the number of such connection retries.
  56  * tftp_timeout_count_max must be non-negative and tftp_timeout_ms must be
  57  * positive. The globals are meant to be set (and restored) by code needing
  58  * non-standard timeout behavior when initiating a TFTP transfer.
  59  */
  60 ulong tftp_timeout_ms = TIMEOUT;
  61 int tftp_timeout_count_max = TIMEOUT_COUNT;
  62
  63 enum {
  64         TFTP_ERR_UNDEFINED           = 0,
  65         TFTP_ERR_FILE_NOT_FOUND      = 1,
  66         TFTP_ERR_ACCESS_DENIED       = 2,
  67         TFTP_ERR_DISK_FULL           = 3,
  68         TFTP_ERR_UNEXPECTED_OPCODE   = 4,
  69         TFTP_ERR_UNKNOWN_TRANSFER_ID  = 5,
  70         TFTP_ERR_FILE_ALREADY_EXISTS = 6,
  71 };
  72
  73 static struct in_addr tftp_remote_ip;
  74 /* The UDP port at their end */
  75 static int      tftp_remote_port;
  76 /* The UDP port at our end */
  77 static int      tftp_our_port;
  78 static int      timeout_count;
  79 /* packet sequence number */
  80 static ulong    tftp_cur_block;
  81 /* last packet sequence number received */
  82 static ulong    tftp_prev_block;
  83 /* count of sequence number wraparounds */
  84 static ulong    tftp_block_wrap;
  85 /* memory offset due to wrapping */
  86 static ulong    tftp_block_wrap_offset;
  87 static int      tftp_state;
  88 static ulong    tftp_load_addr;
  89 #ifdef CONFIG_LMB
  90 static ulong    tftp_load_size;
  91 #endif
  92 #ifdef CONFIG_TFTP_TSIZE
  93 /* The file size reported by the server */
  94 static int      tftp_tsize;
  95 /* The number of hashes we printed */
  96 static short    tftp_tsize_num_hash;
  97 #endif
  98 #ifdef CONFIG_CMD_TFTPPUT
  99 /* 1 if writing, else 0 */
 100 static int      tftp_put_active;
 101 /* 1 if we have sent the last block */
 102 static int      tftp_put_final_block_sent;
 103 #else
 104 #define tftp_put_active 0
 105 #endif
 106
 107 #define STATE_SEND_RRQ  1
 108 #define STATE_DATA      2
 109 #define STATE_TOO_LARGE 3
 110 #define STATE_BAD_MAGIC 4
 111 #define STATE_OACK      5
 112 #define STATE_RECV_WRQ  6
 113 #define STATE_SEND_WRQ  7
 114
 115 /* default TFTP block size */
 116 #define TFTP_BLOCK_SIZE         512
 117 /* sequence number is 16 bit */
 118 #define TFTP_SEQUENCE_SIZE      ((ulong)(1<<16))
 119
 120 #define DEFAULT_NAME_LEN        (8 + 4 + 1)
 121 static char default_filename[DEFAULT_NAME_LEN];
 122
 123 #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
 124 #define MAX_LEN 128
 125 #else
 126 #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
 127 #endif
 128
 129 static char tftp_filename[MAX_LEN];
 130
 131 /* 512 is poor choice for ethernet, MTU is typically 1500.
 132  * Minus eth.hdrs thats 1468.  Can get 2x better throughput with
 133  * almost-MTU block sizes.  At least try... fall back to 512 if need be.
 134  * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
 135  */
 136 #ifdef CONFIG_TFTP_BLOCKSIZE
 137 #define TFTP_MTU_BLOCKSIZE CONFIG_TFTP_BLOCKSIZE
 138 #else
 139 #define TFTP_MTU_BLOCKSIZE 1468
 140 #endif
 141
 142 static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
 143 static unsigned short tftp_block_size_option = TFTP_MTU_BLOCKSIZE;
 144
 145 static inline int store_block(int block, uchar *src, unsigned int len)
 146 {
 147         ulong offset = block * tftp_block_size + tftp_block_wrap_offset;
 148         ulong newsize = offset + len;
 149         ulong store_addr = tftp_load_addr + offset;
 150 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
 151         int i, rc = 0;
 152
 153         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 154                 /* start address in flash? */
 155                 if (flash_info[i].flash_id == FLASH_UNKNOWN)
 156                         continue;
 157                 if (store_addr >= flash_info[i].start[0]) {
 158                         rc = 1;
 159                         break;
 160                 }
 161         }
 162
 163         if (rc) { /* Flash is destination for this packet */
 164                 rc = flash_write((char *)src, store_addr, len);
 165                 if (rc) {
 166                         flash_perror(rc);
 167                         return rc;
 168                 }
 169         } else
 170 #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
 171         {
 172                 void *ptr;
 173
 174 #ifdef CONFIG_LMB
 175                 ulong end_addr = tftp_load_addr + tftp_load_size;
 176
 177                 if (!end_addr)
 178                         end_addr = ULONG_MAX;
 179
 180                 if (store_addr < tftp_load_addr ||
 181                     store_addr + len > end_addr) {
 182                         puts("\nTFTP error: ");
 183                         puts("trying to overwrite reserved memory...\n");
 184                         return -1;
 185                 }
 186 #endif
 187                 ptr = map_sysmem(store_addr, len);
 188                 memcpy(ptr, src, len);
 189                 unmap_sysmem(ptr);
 190         }
 191
 192         if (net_boot_file_size < newsize)
 193                 net_boot_file_size = newsize;
 194
 195         return 0;
 196 }
 197
 198 /* Clear our state ready for a new transfer */
 199 static void new_transfer(void)
 200 {
 201         tftp_prev_block = 0;
 202         tftp_block_wrap = 0;
 203         tftp_block_wrap_offset = 0;
 204 #ifdef CONFIG_CMD_TFTPPUT
 205         tftp_put_final_block_sent = 0;
 206 #endif
 207 }
 208
 209 #ifdef CONFIG_CMD_TFTPPUT
 210 /**
 211  * Load the next block from memory to be sent over tftp.
 212  *
 213  * @param block Block number to send
 214  * @param dst   Destination buffer for data
 215  * @param len   Number of bytes in block (this one and every other)
 216  * @return number of bytes loaded
 217  */
 218 static int load_block(unsigned block, uchar *dst, unsigned len)
 219 {
 220         /* We may want to get the final block from the previous set */
 221         ulong offset = ((int)block - 1) * len + tftp_block_wrap_offset;
 222         ulong tosend = len;
 223
 224         tosend = min(net_boot_file_size - offset, tosend);
 225         (void)memcpy(dst, (void *)(image_save_addr + offset), tosend);
 226         debug("%s: block=%u, offset=%lu, len=%u, tosend=%lu\n", __func__,
 227               block, offset, len, tosend);
 228         return tosend;
 229 }
 230 #endif
 231
 232 static void tftp_send(void);
 233 static void tftp_timeout_handler(void);
 234
 235 /**********************************************************************/
 236
 237 static void show_block_marker(void)
 238 {
 239 #ifdef CONFIG_TFTP_TSIZE
 240         if (tftp_tsize) {
 241                 ulong pos = tftp_cur_block * tftp_block_size +
 242                         tftp_block_wrap_offset;
 243                 if (pos > tftp_tsize)
 244                         pos = tftp_tsize;
 245
 246                 while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
 247                         putc('#');
 248                         tftp_tsize_num_hash++;
 249                 }
 250         } else
 251 #endif
 252         {
 253                 if (((tftp_cur_block - 1) % 10) == 0)
 254                         putc('#');
 255                 else if ((tftp_cur_block % (10 * HASHES_PER_LINE)) == 0)
 256                         puts("\n\t ");
 257         }
 258 }
 259
 260 /**
 261  * restart the current transfer due to an error
 262  *
 263  * @param msg   Message to print for user
 264  */
 265 static void restart(const char *msg)
 266 {
 267         printf("\n%s; starting again\n", msg);
 268         net_start_again();
 269 }
 270
 271 /*
 272  * Check if the block number has wrapped, and update progress
 273  *
 274  * TODO: The egregious use of global variables in this file should be tidied.
 275  */
 276 static void update_block_number(void)
 277 {
 278         /*
 279          * RFC1350 specifies that the first data packet will
 280          * have sequence number 1. If we receive a sequence
 281          * number of 0 this means that there was a wrap
 282          * around of the (16 bit) counter.
 283          */
 284         if (tftp_cur_block == 0 && tftp_prev_block != 0) {
 285                 tftp_block_wrap++;
 286                 tftp_block_wrap_offset += tftp_block_size * TFTP_SEQUENCE_SIZE;
 287                 timeout_count = 0; /* we've done well, reset the timeout */
 288         } else {
 289                 show_block_marker();
 290         }
 291 }
 292
 293 /* The TFTP get or put is complete */
 294 static void tftp_complete(void)
 295 {
 296 #ifdef CONFIG_TFTP_TSIZE
 297         /* Print hash marks for the last packet received */
 298         while (tftp_tsize && tftp_tsize_num_hash < 49) {
 299                 putc('#');
 300                 tftp_tsize_num_hash++;
 301         }
 302         puts("  ");
 303         print_size(tftp_tsize, "");
 304 #endif
 305         time_start = get_timer(time_start);
 306         if (time_start > 0) {
 307                 puts("\n\t ");  /* Line up with "Loading: " */
 308                 print_size(net_boot_file_size /
 309                         time_start * 1000, "/s");
 310         }
 311         puts("\ndone\n");
 312         net_set_state(NETLOOP_SUCCESS);
 313 }
 314
 315 static void tftp_send(void)
 316 {
 317         uchar *pkt;
 318         uchar *xp;
 319         int len = 0;
 320         ushort *s;
 321
 322         /*
 323          *      We will always be sending some sort of packet, so
 324          *      cobble together the packet headers now.
 325          */
 326         pkt = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
 327
 328         switch (tftp_state) {
 329         case STATE_SEND_RRQ:
 330         case STATE_SEND_WRQ:
 331                 xp = pkt;
 332                 s = (ushort *)pkt;
 333 #ifdef CONFIG_CMD_TFTPPUT
 334                 *s++ = htons(tftp_state == STATE_SEND_RRQ ? TFTP_RRQ :
 335                         TFTP_WRQ);
 336 #else
 337                 *s++ = htons(TFTP_RRQ);
 338 #endif
 339                 pkt = (uchar *)s;
 340                 strcpy((char *)pkt, tftp_filename);
 341                 pkt += strlen(tftp_filename) + 1;
 342                 strcpy((char *)pkt, "octet");
 343                 pkt += 5 /*strlen("octet")*/ + 1;
 344                 strcpy((char *)pkt, "timeout");
 345                 pkt += 7 /*strlen("timeout")*/ + 1;
 346                 sprintf((char *)pkt, "%lu", timeout_ms / 1000);
 347                 debug("send option \"timeout %s\"\n", (char *)pkt);
 348                 pkt += strlen((char *)pkt) + 1;
 349 #ifdef CONFIG_TFTP_TSIZE
 350                 pkt += sprintf((char *)pkt, "tsize%c%u%c",
 351                                 0, net_boot_file_size, 0);
 352 #endif
 353                 /* try for more effic. blk size */
 354                 pkt += sprintf((char *)pkt, "blksize%c%d%c",
 355                                 0, tftp_block_size_option, 0);
 356                 len = pkt - xp;
 357                 break;
 358
 359         case STATE_OACK:
 360
 361         case STATE_RECV_WRQ:
 362         case STATE_DATA:
 363                 xp = pkt;
 364                 s = (ushort *)pkt;
 365                 s[0] = htons(TFTP_ACK);
 366                 s[1] = htons(tftp_cur_block);
 367                 pkt = (uchar *)(s + 2);
 368 #ifdef CONFIG_CMD_TFTPPUT
 369                 if (tftp_put_active) {
 370                         int toload = tftp_block_size;
 371                         int loaded = load_block(tftp_cur_block, pkt, toload);
 372
 373                         s[0] = htons(TFTP_DATA);
 374                         pkt += loaded;
 375                         tftp_put_final_block_sent = (loaded < toload);
 376                 }
 377 #endif
 378                 len = pkt - xp;
 379                 break;
 380
 381         case STATE_TOO_LARGE:
 382                 xp = pkt;
 383                 s = (ushort *)pkt;
 384                 *s++ = htons(TFTP_ERROR);
 385                         *s++ = htons(3);
 386
 387                 pkt = (uchar *)s;
 388                 strcpy((char *)pkt, "File too large");
 389                 pkt += 14 /*strlen("File too large")*/ + 1;
 390                 len = pkt - xp;
 391                 break;
 392
 393         case STATE_BAD_MAGIC:
 394                 xp = pkt;
 395                 s = (ushort *)pkt;
 396                 *s++ = htons(TFTP_ERROR);
 397                 *s++ = htons(2);
 398                 pkt = (uchar *)s;
 399                 strcpy((char *)pkt, "File has bad magic");
 400                 pkt += 18 /*strlen("File has bad magic")*/ + 1;
 401                 len = pkt - xp;
 402                 break;
 403         }
 404
 405         net_send_udp_packet(net_server_ethaddr, tftp_remote_ip,
 406                             tftp_remote_port, tftp_our_port, len);
 407 }
 408
 409 #ifdef CONFIG_CMD_TFTPPUT
 410 static void icmp_handler(unsigned type, unsigned code, unsigned dest,
 411                          struct in_addr sip, unsigned src, uchar *pkt,
 412                          unsigned len)
 413 {
 414         if (type == ICMP_NOT_REACH && code == ICMP_NOT_REACH_PORT) {
 415                 /* Oh dear the other end has gone away */
 416                 restart("TFTP server died");
 417         }
 418 }
 419 #endif
 420
 421 static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 422                          unsigned src, unsigned len)
 423 {
 424         __be16 proto;
 425         __be16 *s;
 426         int i;
 427
 428         if (dest != tftp_our_port) {
 429                         return;
 430         }
 431         if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
 432             tftp_state != STATE_RECV_WRQ && tftp_state != STATE_SEND_WRQ)
 433                 return;
 434
 435         if (len < 2)
 436                 return;
 437         len -= 2;
 438         /* warning: don't use increment (++) in ntohs() macros!! */
 439         s = (__be16 *)pkt;
 440         proto = *s++;
 441         pkt = (uchar *)s;
 442         switch (ntohs(proto)) {
 443         case TFTP_RRQ:
 444                 break;
 445
 446         case TFTP_ACK:
 447 #ifdef CONFIG_CMD_TFTPPUT
 448                 if (tftp_put_active) {
 449                         if (tftp_put_final_block_sent) {
 450                                 tftp_complete();
 451                         } else {
 452                                 /*
 453                                  * Move to the next block. We want our block
 454                                  * count to wrap just like the other end!
 455                                  */
 456                                 int block = ntohs(*s);
 457                                 int ack_ok = (tftp_cur_block == block);
 458
 459                                 tftp_cur_block = (unsigned short)(block + 1);
 460                                 update_block_number();
 461                                 if (ack_ok)
 462                                         tftp_send(); /* Send next data block */
 463                         }
 464                 }
 465 #endif
 466                 break;
 467
 468         default:
 469                 break;
 470
 471 #ifdef CONFIG_CMD_TFTPSRV
 472         case TFTP_WRQ:
 473                 debug("Got WRQ\n");
 474                 tftp_remote_ip = sip;
 475                 tftp_remote_port = src;
 476                 tftp_our_port = 1024 + (get_timer(0) % 3072);
 477                 new_transfer();
 478                 tftp_send(); /* Send ACK(0) */
 479                 break;
 480 #endif
 481
 482         case TFTP_OACK:
 483                 debug("Got OACK: %s %s\n",
 484                       pkt, pkt + strlen((char *)pkt) + 1);
 485                 tftp_state = STATE_OACK;
 486                 tftp_remote_port = src;
 487                 /*
 488                  * Check for 'blksize' option.
 489                  * Careful: "i" is signed, "len" is unsigned, thus
 490                  * something like "len-8" may give a *huge* number
 491                  */
 492                 for (i = 0; i+8 < len; i++) {
 493                         if (strcmp((char *)pkt + i, "blksize") == 0) {
 494                                 tftp_block_size = (unsigned short)
 495                                         simple_strtoul((char *)pkt + i + 8,
 496                                                        NULL, 10);
 497                                 debug("Blocksize ack: %s, %d\n",
 498                                       (char *)pkt + i + 8, tftp_block_size);
 499                         }
 500 #ifdef CONFIG_TFTP_TSIZE
 501                         if (strcmp((char *)pkt+i, "tsize") == 0) {
 502                                 tftp_tsize = simple_strtoul((char *)pkt + i + 6,
 503                                                            NULL, 10);
 504                                 debug("size = %s, %d\n",
 505                                       (char *)pkt + i + 6, tftp_tsize);
 506                         }
 507 #endif
 508                 }
 509 #ifdef CONFIG_CMD_TFTPPUT
 510                 if (tftp_put_active) {
 511                         /* Get ready to send the first block */
 512                         tftp_state = STATE_DATA;
 513                         tftp_cur_block++;
 514                 }
 515 #endif
 516                 tftp_send(); /* Send ACK or first data block */
 517                 break;
 518         case TFTP_DATA:
 519                 if (len < 2)
 520                         return;
 521                 len -= 2;
 522                 tftp_cur_block = ntohs(*(__be16 *)pkt);
 523
 524                 update_block_number();
 525
 526                 if (tftp_state == STATE_SEND_RRQ)
 527                         debug("Server did not acknowledge timeout option!\n");
 528
 529                 if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
 530                     tftp_state == STATE_RECV_WRQ) {
 531                         /* first block received */
 532                         tftp_state = STATE_DATA;
 533                         tftp_remote_port = src;
 534                         new_transfer();
 535
 536                         if (tftp_cur_block != 1) {      /* Assertion */
 537                                 puts("\nTFTP error: ");
 538                                 printf("First block is not block 1 (%ld)\n",
 539                                        tftp_cur_block);
 540                                 puts("Starting again\n\n");
 541                                 net_start_again();
 542                                 break;
 543                         }
 544                 }
 545
 546                 if (tftp_cur_block == tftp_prev_block) {
 547                         /* Same block again; ignore it. */
 548                         break;
 549                 }
 550
 551                 tftp_prev_block = tftp_cur_block;
 552                 timeout_count_max = tftp_timeout_count_max;
 553                 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 554
 555                 if (store_block(tftp_cur_block - 1, pkt + 2, len)) {
 556                         eth_halt();
 557                         net_set_state(NETLOOP_FAIL);
 558                         break;
 559                 }
 560
 561                 /*
 562                  *      Acknowledge the block just received, which will prompt
 563                  *      the remote for the next one.
 564                  */
 565                 tftp_send();
 566
 567                 if (len < tftp_block_size)
 568                         tftp_complete();
 569                 break;
 570
 571         case TFTP_ERROR:
 572                 printf("\nTFTP error: '%s' (%d)\n",
 573                        pkt + 2, ntohs(*(__be16 *)pkt));
 574
 575                 switch (ntohs(*(__be16 *)pkt)) {
 576                 case TFTP_ERR_FILE_NOT_FOUND:
 577                 case TFTP_ERR_ACCESS_DENIED:
 578                         puts("Not retrying...\n");
 579                         eth_halt();
 580                         net_set_state(NETLOOP_FAIL);
 581                         break;
 582                 case TFTP_ERR_UNDEFINED:
 583                 case TFTP_ERR_DISK_FULL:
 584                 case TFTP_ERR_UNEXPECTED_OPCODE:
 585                 case TFTP_ERR_UNKNOWN_TRANSFER_ID:
 586                 case TFTP_ERR_FILE_ALREADY_EXISTS:
 587                 default:
 588                         puts("Starting again\n\n");
 589                         net_start_again();
 590                         break;
 591                 }
 592                 break;
 593         }
 594 }
 595
 596
 597 static void tftp_timeout_handler(void)
 598 {
 599         if (++timeout_count > timeout_count_max) {
 600                 restart("Retry count exceeded");
 601         } else {
 602                 puts("T ");
 603                 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 604                 if (tftp_state != STATE_RECV_WRQ)
 605                         tftp_send();
 606         }
 607 }
 608
 609 /* Initialize tftp_load_addr and tftp_load_size from image_load_addr and lmb */
 610 static int tftp_init_load_addr(void)
 611 {
 612 #ifdef CONFIG_LMB
 613         struct lmb lmb;
 614         phys_size_t max_size;
 615
 616         lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
 617
 618         max_size = lmb_get_free_size(&lmb, image_load_addr);
 619         if (!max_size)
 620                 return -1;
 621
 622         tftp_load_size = max_size;
 623 #endif
 624         tftp_load_addr = image_load_addr;
 625         return 0;
 626 }
 627
 628 void tftp_start(enum proto_t protocol)
 629 {
 630 #if CONFIG_NET_TFTP_VARS
 631         char *ep;             /* Environment pointer */
 632
 633         /*
 634          * Allow the user to choose TFTP blocksize and timeout.
 635          * TFTP protocol has a minimal timeout of 1 second.
 636          */
 637
 638         ep = env_get("tftpblocksize");
 639         if (ep != NULL)
 640                 tftp_block_size_option = simple_strtol(ep, NULL, 10);
 641
 642         ep = env_get("tftptimeout");
 643         if (ep != NULL)
 644                 timeout_ms = simple_strtol(ep, NULL, 10);
 645
 646         if (timeout_ms < 1000) {
 647                 printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
 648                        timeout_ms);
 649                 timeout_ms = 1000;
 650         }
 651
 652         ep = env_get("tftptimeoutcountmax");
 653         if (ep != NULL)
 654                 tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
 655
 656         if (tftp_timeout_count_max < 0) {
 657                 printf("TFTP timeout count max (%d ms) negative, set to 0\n",
 658                        tftp_timeout_count_max);
 659                 tftp_timeout_count_max = 0;
 660         }
 661 #endif
 662
 663         debug("TFTP blocksize = %i, timeout = %ld ms\n",
 664               tftp_block_size_option, timeout_ms);
 665
 666         tftp_remote_ip = net_server_ip;
 667         if (!net_parse_bootfile(&tftp_remote_ip, tftp_filename, MAX_LEN)) {
 668                 sprintf(default_filename, "%02X%02X%02X%02X.img",
 669                         net_ip.s_addr & 0xFF,
 670                         (net_ip.s_addr >>  8) & 0xFF,
 671                         (net_ip.s_addr >> 16) & 0xFF,
 672                         (net_ip.s_addr >> 24) & 0xFF);
 673
 674                 strncpy(tftp_filename, default_filename, DEFAULT_NAME_LEN);
 675                 tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
 676
 677                 printf("*** Warning: no boot file name; using '%s'\n",
 678                        tftp_filename);
 679         }
 680
 681         printf("Using %s device\n", eth_get_name());
 682         printf("TFTP %s server %pI4; our IP address is %pI4",
 683 #ifdef CONFIG_CMD_TFTPPUT
 684                protocol == TFTPPUT ? "to" : "from",
 685 #else
 686                "from",
 687 #endif
 688                &tftp_remote_ip, &net_ip);
 689
 690         /* Check if we need to send across this subnet */
 691         if (net_gateway.s_addr && net_netmask.s_addr) {
 692                 struct in_addr our_net;
 693                 struct in_addr remote_net;
 694
 695                 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
 696                 remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
 697                 if (our_net.s_addr != remote_net.s_addr)
 698                         printf("; sending through gateway %pI4", &net_gateway);
 699         }
 700         putc('\n');
 701
 702         printf("Filename '%s'.", tftp_filename);
 703
 704         if (net_boot_file_expected_size_in_blocks) {
 705                 printf(" Size is 0x%x Bytes = ",
 706                        net_boot_file_expected_size_in_blocks << 9);
 707                 print_size(net_boot_file_expected_size_in_blocks << 9, "");
 708         }
 709
 710         putc('\n');
 711 #ifdef CONFIG_CMD_TFTPPUT
 712         tftp_put_active = (protocol == TFTPPUT);
 713         if (tftp_put_active) {
 714                 printf("Save address: 0x%lx\n", image_save_addr);
 715                 printf("Save size:    0x%lx\n", image_save_size);
 716                 net_boot_file_size = image_save_size;
 717                 puts("Saving: *\b");
 718                 tftp_state = STATE_SEND_WRQ;
 719                 new_transfer();
 720         } else
 721 #endif
 722         {
 723                 if (tftp_init_load_addr()) {
 724                         eth_halt();
 725                         net_set_state(NETLOOP_FAIL);
 726                         puts("\nTFTP error: ");
 727                         puts("trying to overwrite reserved memory...\n");
 728                         return;
 729                 }
 730                 printf("Load address: 0x%lx\n", tftp_load_addr);
 731                 puts("Loading: *\b");
 732                 tftp_state = STATE_SEND_RRQ;
 733 #ifdef CONFIG_CMD_BOOTEFI
 734                 efi_set_bootdev("Net", "", tftp_filename);
 735 #endif
 736         }
 737
 738         time_start = get_timer(0);
 739         timeout_count_max = tftp_timeout_count_max;
 740
 741         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 742         net_set_udp_handler(tftp_handler);
 743 #ifdef CONFIG_CMD_TFTPPUT
 744         net_set_icmp_handler(icmp_handler);
 745 #endif
 746         tftp_remote_port = WELL_KNOWN_PORT;
 747         timeout_count = 0;
 748         /* Use a pseudo-random port unless a specific port is set */
 749         tftp_our_port = 1024 + (get_timer(0) % 3072);
 750
 751 #ifdef CONFIG_TFTP_PORT
 752         ep = env_get("tftpdstp");
 753         if (ep != NULL)
 754                 tftp_remote_port = simple_strtol(ep, NULL, 10);
 755         ep = env_get("tftpsrcp");
 756         if (ep != NULL)
 757                 tftp_our_port = simple_strtol(ep, NULL, 10);
 758 #endif
 759         tftp_cur_block = 0;
 760
 761         /* zero out server ether in case the server ip has changed */
 762         memset(net_server_ethaddr, 0, 6);
 763         /* Revert tftp_block_size to dflt */
 764         tftp_block_size = TFTP_BLOCK_SIZE;
 765 #ifdef CONFIG_TFTP_TSIZE
 766         tftp_tsize = 0;
 767         tftp_tsize_num_hash = 0;
 768 #endif
 769
 770         tftp_send();
 771 }
 772
 773 #ifdef CONFIG_CMD_TFTPSRV
 774 void tftp_start_server(void)
 775 {
 776         tftp_filename[0] = 0;
 777
 778         if (tftp_init_load_addr()) {
 779                 eth_halt();
 780                 net_set_state(NETLOOP_FAIL);
 781                 puts("\nTFTP error: trying to overwrite reserved memory...\n");
 782                 return;
 783         }
 784         printf("Using %s device\n", eth_get_name());
 785         printf("Listening for TFTP transfer on %pI4\n", &net_ip);
 786         printf("Load address: 0x%lx\n", tftp_load_addr);
 787
 788         puts("Loading: *\b");
 789
 790         timeout_count_max = tftp_timeout_count_max;
 791         timeout_count = 0;
 792         timeout_ms = TIMEOUT;
 793         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 794
 795         /* Revert tftp_block_size to dflt */
 796         tftp_block_size = TFTP_BLOCK_SIZE;
 797         tftp_cur_block = 0;
 798         tftp_our_port = WELL_KNOWN_PORT;
 799
 800 #ifdef CONFIG_TFTP_TSIZE
 801         tftp_tsize = 0;
 802         tftp_tsize_num_hash = 0;
 803 #endif
 804
 805         tftp_state = STATE_RECV_WRQ;
 806         net_set_udp_handler(tftp_handler);
 807
 808         /* zero out server ether in case the server ip has changed */
 809         memset(net_server_ethaddr, 0, 6);
 810 }
 811 #endif /* CONFIG_CMD_TFTPSRV */
 812