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 <log.h>
  16 #include <mapmem.h>
  17 #include <net.h>
  18 #include <net/tftp.h>
  19 #include "bootp.h"
  20 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
  21 #include <flash.h>
  22 #endif
  23
  24 DECLARE_GLOBAL_DATA_PTR;
  25
  26 /* Well known TFTP port # */
  27 #define WELL_KNOWN_PORT 69
  28 /* Millisecs to timeout for lost pkt */
  29 #define TIMEOUT         5000UL
  30 #ifndef CONFIG_NET_RETRY_COUNT
  31 /* # of timeouts before giving up */
  32 # define TIMEOUT_COUNT  10
  33 #else
  34 # define TIMEOUT_COUNT  (CONFIG_NET_RETRY_COUNT * 2)
  35 #endif
  36 /* Number of "loading" hashes per line (for checking the image size) */
  37 #define HASHES_PER_LINE 65
  38
  39 /*
  40  *      TFTP operations.
  41  */
  42 #define TFTP_RRQ        1
  43 #define TFTP_WRQ        2
  44 #define TFTP_DATA       3
  45 #define TFTP_ACK        4
  46 #define TFTP_ERROR      5
  47 #define TFTP_OACK       6
  48
  49 static ulong timeout_ms = TIMEOUT;
  50 static int timeout_count_max = TIMEOUT_COUNT;
  51 static ulong time_start;   /* Record time we started tftp */
  52
  53 /*
  54  * These globals govern the timeout behavior when attempting a connection to a
  55  * TFTP server. tftp_timeout_ms specifies the number of milliseconds to
  56  * wait for the server to respond to initial connection. Second global,
  57  * tftp_timeout_count_max, gives the number of such connection retries.
  58  * tftp_timeout_count_max must be non-negative and tftp_timeout_ms must be
  59  * positive. The globals are meant to be set (and restored) by code needing
  60  * non-standard timeout behavior when initiating a TFTP transfer.
  61  */
  62 ulong tftp_timeout_ms = TIMEOUT;
  63 int tftp_timeout_count_max = TIMEOUT_COUNT;
  64
  65 enum {
  66         TFTP_ERR_UNDEFINED           = 0,
  67         TFTP_ERR_FILE_NOT_FOUND      = 1,
  68         TFTP_ERR_ACCESS_DENIED       = 2,
  69         TFTP_ERR_DISK_FULL           = 3,
  70         TFTP_ERR_UNEXPECTED_OPCODE   = 4,
  71         TFTP_ERR_UNKNOWN_TRANSFER_ID  = 5,
  72         TFTP_ERR_FILE_ALREADY_EXISTS = 6,
  73 };
  74
  75 static struct in_addr tftp_remote_ip;
  76 /* The UDP port at their end */
  77 static int      tftp_remote_port;
  78 /* The UDP port at our end */
  79 static int      tftp_our_port;
  80 static int      timeout_count;
  81 /* packet sequence number */
  82 static ulong    tftp_cur_block;
  83 /* last packet sequence number received */
  84 static ulong    tftp_prev_block;
  85 /* count of sequence number wraparounds */
  86 static ulong    tftp_block_wrap;
  87 /* memory offset due to wrapping */
  88 static ulong    tftp_block_wrap_offset;
  89 static int      tftp_state;
  90 static ulong    tftp_load_addr;
  91 #ifdef CONFIG_LMB
  92 static ulong    tftp_load_size;
  93 #endif
  94 #ifdef CONFIG_TFTP_TSIZE
  95 /* The file size reported by the server */
  96 static int      tftp_tsize;
  97 /* The number of hashes we printed */
  98 static short    tftp_tsize_num_hash;
  99 #endif
 100 #ifdef CONFIG_CMD_TFTPPUT
 101 /* 1 if writing, else 0 */
 102 static int      tftp_put_active;
 103 /* 1 if we have sent the last block */
 104 static int      tftp_put_final_block_sent;
 105 #else
 106 #define tftp_put_active 0
 107 #endif
 108
 109 #define STATE_SEND_RRQ  1
 110 #define STATE_DATA      2
 111 #define STATE_TOO_LARGE 3
 112 #define STATE_BAD_MAGIC 4
 113 #define STATE_OACK      5
 114 #define STATE_RECV_WRQ  6
 115 #define STATE_SEND_WRQ  7
 116
 117 /* default TFTP block size */
 118 #define TFTP_BLOCK_SIZE         512
 119 /* sequence number is 16 bit */
 120 #define TFTP_SEQUENCE_SIZE      ((ulong)(1<<16))
 121
 122 #define DEFAULT_NAME_LEN        (8 + 4 + 1)
 123 static char default_filename[DEFAULT_NAME_LEN];
 124
 125 #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
 126 #define MAX_LEN 128
 127 #else
 128 #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
 129 #endif
 130
 131 static char tftp_filename[MAX_LEN];
 132
 133 /* 512 is poor choice for ethernet, MTU is typically 1500.
 134  * Minus eth.hdrs thats 1468.  Can get 2x better throughput with
 135  * almost-MTU block sizes.  At least try... fall back to 512 if need be.
 136  * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
 137  */
 138
 139 static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
 140 static unsigned short tftp_block_size_option = CONFIG_TFTP_BLOCKSIZE;
 141
 142 static inline int store_block(int block, uchar *src, unsigned int len)
 143 {
 144         ulong offset = block * tftp_block_size + tftp_block_wrap_offset;
 145         ulong newsize = offset + len;
 146         ulong store_addr = tftp_load_addr + offset;
 147 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
 148         int i, rc = 0;
 149
 150         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 151                 /* start address in flash? */
 152                 if (flash_info[i].flash_id == FLASH_UNKNOWN)
 153                         continue;
 154                 if (store_addr >= flash_info[i].start[0]) {
 155                         rc = 1;
 156                         break;
 157                 }
 158         }
 159
 160         if (rc) { /* Flash is destination for this packet */
 161                 rc = flash_write((char *)src, store_addr, len);
 162                 if (rc) {
 163                         flash_perror(rc);
 164                         return rc;
 165                 }
 166         } else
 167 #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
 168         {
 169                 void *ptr;
 170
 171 #ifdef CONFIG_LMB
 172                 ulong end_addr = tftp_load_addr + tftp_load_size;
 173
 174                 if (!end_addr)
 175                         end_addr = ULONG_MAX;
 176
 177                 if (store_addr < tftp_load_addr ||
 178                     store_addr + len > end_addr) {
 179                         puts("\nTFTP error: ");
 180                         puts("trying to overwrite reserved memory...\n");
 181                         return -1;
 182                 }
 183 #endif
 184                 ptr = map_sysmem(store_addr, len);
 185                 memcpy(ptr, src, len);
 186                 unmap_sysmem(ptr);
 187         }
 188
 189         if (net_boot_file_size < newsize)
 190                 net_boot_file_size = newsize;
 191
 192         return 0;
 193 }
 194
 195 /* Clear our state ready for a new transfer */
 196 static void new_transfer(void)
 197 {
 198         tftp_prev_block = 0;
 199         tftp_block_wrap = 0;
 200         tftp_block_wrap_offset = 0;
 201 #ifdef CONFIG_CMD_TFTPPUT
 202         tftp_put_final_block_sent = 0;
 203 #endif
 204 }
 205
 206 #ifdef CONFIG_CMD_TFTPPUT
 207 /**
 208  * Load the next block from memory to be sent over tftp.
 209  *
 210  * @param block Block number to send
 211  * @param dst   Destination buffer for data
 212  * @param len   Number of bytes in block (this one and every other)
 213  * @return number of bytes loaded
 214  */
 215 static int load_block(unsigned block, uchar *dst, unsigned len)
 216 {
 217         /* We may want to get the final block from the previous set */
 218         ulong offset = ((int)block - 1) * len + tftp_block_wrap_offset;
 219         ulong tosend = len;
 220
 221         tosend = min(net_boot_file_size - offset, tosend);
 222         (void)memcpy(dst, (void *)(image_save_addr + offset), tosend);
 223         debug("%s: block=%u, offset=%lu, len=%u, tosend=%lu\n", __func__,
 224               block, offset, len, tosend);
 225         return tosend;
 226 }
 227 #endif
 228
 229 static void tftp_send(void);
 230 static void tftp_timeout_handler(void);
 231
 232 /**********************************************************************/
 233
 234 static void show_block_marker(void)
 235 {
 236         ulong pos;
 237
 238 #ifdef CONFIG_TFTP_TSIZE
 239         if (tftp_tsize) {
 240                 pos = tftp_cur_block * tftp_block_size +
 241                         tftp_block_wrap_offset;
 242                 if (pos > tftp_tsize)
 243                         pos = tftp_tsize;
 244
 245                 while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
 246                         putc('#');
 247                         tftp_tsize_num_hash++;
 248                 }
 249         } else
 250 #endif
 251         {
 252                 pos = (tftp_cur_block - 1) +
 253                         (tftp_block_wrap * TFTP_SEQUENCE_SIZE);
 254                 if ((pos % 10) == 0)
 255                         putc('#');
 256                 else if (((pos + 1) % (10 * HASHES_PER_LINE)) == 0)
 257                         puts("\n\t ");
 258         }
 259 }
 260
 261 /**
 262  * restart the current transfer due to an error
 263  *
 264  * @param msg   Message to print for user
 265  */
 266 static void restart(const char *msg)
 267 {
 268         printf("\n%s; starting again\n", msg);
 269         net_start_again();
 270 }
 271
 272 /*
 273  * Check if the block number has wrapped, and update progress
 274  *
 275  * TODO: The egregious use of global variables in this file should be tidied.
 276  */
 277 static void update_block_number(void)
 278 {
 279         /*
 280          * RFC1350 specifies that the first data packet will
 281          * have sequence number 1. If we receive a sequence
 282          * number of 0 this means that there was a wrap
 283          * around of the (16 bit) counter.
 284          */
 285         if (tftp_cur_block == 0 && tftp_prev_block != 0) {
 286                 tftp_block_wrap++;
 287                 tftp_block_wrap_offset += tftp_block_size * TFTP_SEQUENCE_SIZE;
 288                 timeout_count = 0; /* we've done well, reset the timeout */
 289         }
 290         show_block_marker();
 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                 if (tftp_state == STATE_SEND_RRQ)
 525                         debug("Server did not acknowledge timeout option!\n");
 526
 527                 if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
 528                     tftp_state == STATE_RECV_WRQ) {
 529                         /* first block received */
 530                         tftp_state = STATE_DATA;
 531                         tftp_remote_port = src;
 532                         new_transfer();
 533
 534                         if (tftp_cur_block != 1) {      /* Assertion */
 535                                 puts("\nTFTP error: ");
 536                                 printf("First block is not block 1 (%ld)\n",
 537                                        tftp_cur_block);
 538                                 puts("Starting again\n\n");
 539                                 net_start_again();
 540                                 break;
 541                         }
 542                 }
 543
 544                 if (tftp_cur_block == tftp_prev_block) {
 545                         /* Same block again; ignore it. */
 546                         break;
 547                 }
 548
 549                 update_block_number();
 550                 tftp_prev_block = tftp_cur_block;
 551                 timeout_count_max = tftp_timeout_count_max;
 552                 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 553
 554                 if (store_block(tftp_cur_block - 1, pkt + 2, len)) {
 555                         eth_halt();
 556                         net_set_state(NETLOOP_FAIL);
 557                         break;
 558                 }
 559
 560                 /*
 561                  *      Acknowledge the block just received, which will prompt
 562                  *      the remote for the next one.
 563                  */
 564                 tftp_send();
 565
 566                 if (len < tftp_block_size)
 567                         tftp_complete();
 568                 break;
 569
 570         case TFTP_ERROR:
 571                 printf("\nTFTP error: '%s' (%d)\n",
 572                        pkt + 2, ntohs(*(__be16 *)pkt));
 573
 574                 switch (ntohs(*(__be16 *)pkt)) {
 575                 case TFTP_ERR_FILE_NOT_FOUND:
 576                 case TFTP_ERR_ACCESS_DENIED:
 577                         puts("Not retrying...\n");
 578                         eth_halt();
 579                         net_set_state(NETLOOP_FAIL);
 580                         break;
 581                 case TFTP_ERR_UNDEFINED:
 582                 case TFTP_ERR_DISK_FULL:
 583                 case TFTP_ERR_UNEXPECTED_OPCODE:
 584                 case TFTP_ERR_UNKNOWN_TRANSFER_ID:
 585                 case TFTP_ERR_FILE_ALREADY_EXISTS:
 586                 default:
 587                         puts("Starting again\n\n");
 588                         net_start_again();
 589                         break;
 590                 }
 591                 break;
 592         }
 593 }
 594
 595
 596 static void tftp_timeout_handler(void)
 597 {
 598         if (++timeout_count > timeout_count_max) {
 599                 restart("Retry count exceeded");
 600         } else {
 601                 puts("T ");
 602                 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 603                 if (tftp_state != STATE_RECV_WRQ)
 604                         tftp_send();
 605         }
 606 }
 607
 608 /* Initialize tftp_load_addr and tftp_load_size from image_load_addr and lmb */
 609 static int tftp_init_load_addr(void)
 610 {
 611 #ifdef CONFIG_LMB
 612         struct lmb lmb;
 613         phys_size_t max_size;
 614
 615         lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
 616
 617         max_size = lmb_get_free_size(&lmb, image_load_addr);
 618         if (!max_size)
 619                 return -1;
 620
 621         tftp_load_size = max_size;
 622 #endif
 623         tftp_load_addr = image_load_addr;
 624         return 0;
 625 }
 626
 627 void tftp_start(enum proto_t protocol)
 628 {
 629 #if CONFIG_NET_TFTP_VARS
 630         char *ep;             /* Environment pointer */
 631
 632         /*
 633          * Allow the user to choose TFTP blocksize and timeout.
 634          * TFTP protocol has a minimal timeout of 1 second.
 635          */
 636
 637         ep = env_get("tftpblocksize");
 638         if (ep != NULL)
 639                 tftp_block_size_option = simple_strtol(ep, NULL, 10);
 640
 641         ep = env_get("tftptimeout");
 642         if (ep != NULL)
 643                 timeout_ms = simple_strtol(ep, NULL, 10);
 644
 645         if (timeout_ms < 1000) {
 646                 printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
 647                        timeout_ms);
 648                 timeout_ms = 1000;
 649         }
 650
 651         ep = env_get("tftptimeoutcountmax");
 652         if (ep != NULL)
 653                 tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
 654
 655         if (tftp_timeout_count_max < 0) {
 656                 printf("TFTP timeout count max (%d ms) negative, set to 0\n",
 657                        tftp_timeout_count_max);
 658                 tftp_timeout_count_max = 0;
 659         }
 660 #endif
 661
 662         debug("TFTP blocksize = %i, timeout = %ld ms\n",
 663               tftp_block_size_option, timeout_ms);
 664
 665         tftp_remote_ip = net_server_ip;
 666         if (!net_parse_bootfile(&tftp_remote_ip, tftp_filename, MAX_LEN)) {
 667                 sprintf(default_filename, "%02X%02X%02X%02X.img",
 668                         net_ip.s_addr & 0xFF,
 669                         (net_ip.s_addr >>  8) & 0xFF,
 670                         (net_ip.s_addr >> 16) & 0xFF,
 671                         (net_ip.s_addr >> 24) & 0xFF);
 672
 673                 strncpy(tftp_filename, default_filename, DEFAULT_NAME_LEN);
 674                 tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
 675
 676                 printf("*** Warning: no boot file name; using '%s'\n",
 677                        tftp_filename);
 678         }
 679
 680         printf("Using %s device\n", eth_get_name());
 681         printf("TFTP %s server %pI4; our IP address is %pI4",
 682 #ifdef CONFIG_CMD_TFTPPUT
 683                protocol == TFTPPUT ? "to" : "from",
 684 #else
 685                "from",
 686 #endif
 687                &tftp_remote_ip, &net_ip);
 688
 689         /* Check if we need to send across this subnet */
 690         if (net_gateway.s_addr && net_netmask.s_addr) {
 691                 struct in_addr our_net;
 692                 struct in_addr remote_net;
 693
 694                 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
 695                 remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
 696                 if (our_net.s_addr != remote_net.s_addr)
 697                         printf("; sending through gateway %pI4", &net_gateway);
 698         }
 699         putc('\n');
 700
 701         printf("Filename '%s'.", tftp_filename);
 702
 703         if (net_boot_file_expected_size_in_blocks) {
 704                 printf(" Size is 0x%x Bytes = ",
 705                        net_boot_file_expected_size_in_blocks << 9);
 706                 print_size(net_boot_file_expected_size_in_blocks << 9, "");
 707         }
 708
 709         putc('\n');
 710 #ifdef CONFIG_CMD_TFTPPUT
 711         tftp_put_active = (protocol == TFTPPUT);
 712         if (tftp_put_active) {
 713                 printf("Save address: 0x%lx\n", image_save_addr);
 714                 printf("Save size:    0x%lx\n", image_save_size);
 715                 net_boot_file_size = image_save_size;
 716                 puts("Saving: *\b");
 717                 tftp_state = STATE_SEND_WRQ;
 718                 new_transfer();
 719         } else
 720 #endif
 721         {
 722                 if (tftp_init_load_addr()) {
 723                         eth_halt();
 724                         net_set_state(NETLOOP_FAIL);
 725                         puts("\nTFTP error: ");
 726                         puts("trying to overwrite reserved memory...\n");
 727                         return;
 728                 }
 729                 printf("Load address: 0x%lx\n", tftp_load_addr);
 730                 puts("Loading: *\b");
 731                 tftp_state = STATE_SEND_RRQ;
 732 #ifdef CONFIG_CMD_BOOTEFI
 733                 efi_set_bootdev("Net", "", tftp_filename);
 734 #endif
 735         }
 736
 737         time_start = get_timer(0);
 738         timeout_count_max = tftp_timeout_count_max;
 739
 740         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 741         net_set_udp_handler(tftp_handler);
 742 #ifdef CONFIG_CMD_TFTPPUT
 743         net_set_icmp_handler(icmp_handler);
 744 #endif
 745         tftp_remote_port = WELL_KNOWN_PORT;
 746         timeout_count = 0;
 747         /* Use a pseudo-random port unless a specific port is set */
 748         tftp_our_port = 1024 + (get_timer(0) % 3072);
 749
 750 #ifdef CONFIG_TFTP_PORT
 751         ep = env_get("tftpdstp");
 752         if (ep != NULL)
 753                 tftp_remote_port = simple_strtol(ep, NULL, 10);
 754         ep = env_get("tftpsrcp");
 755         if (ep != NULL)
 756                 tftp_our_port = simple_strtol(ep, NULL, 10);
 757 #endif
 758         tftp_cur_block = 0;
 759
 760         /* zero out server ether in case the server ip has changed */
 761         memset(net_server_ethaddr, 0, 6);
 762         /* Revert tftp_block_size to dflt */
 763         tftp_block_size = TFTP_BLOCK_SIZE;
 764 #ifdef CONFIG_TFTP_TSIZE
 765         tftp_tsize = 0;
 766         tftp_tsize_num_hash = 0;
 767 #endif
 768
 769         tftp_send();
 770 }
 771
 772 #ifdef CONFIG_CMD_TFTPSRV
 773 void tftp_start_server(void)
 774 {
 775         tftp_filename[0] = 0;
 776
 777         if (tftp_init_load_addr()) {
 778                 eth_halt();
 779                 net_set_state(NETLOOP_FAIL);
 780                 puts("\nTFTP error: trying to overwrite reserved memory...\n");
 781                 return;
 782         }
 783         printf("Using %s device\n", eth_get_name());
 784         printf("Listening for TFTP transfer on %pI4\n", &net_ip);
 785         printf("Load address: 0x%lx\n", tftp_load_addr);
 786
 787         puts("Loading: *\b");
 788
 789         timeout_count_max = tftp_timeout_count_max;
 790         timeout_count = 0;
 791         timeout_ms = TIMEOUT;
 792         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 793
 794         /* Revert tftp_block_size to dflt */
 795         tftp_block_size = TFTP_BLOCK_SIZE;
 796         tftp_cur_block = 0;
 797         tftp_our_port = WELL_KNOWN_PORT;
 798
 799 #ifdef CONFIG_TFTP_TSIZE
 800         tftp_tsize = 0;
 801         tftp_tsize_num_hash = 0;
 802 #endif
 803
 804         tftp_state = STATE_RECV_WRQ;
 805         net_set_udp_handler(tftp_handler);
 806
 807         /* zero out server ether in case the server ip has changed */
 808         memset(net_server_ethaddr, 0, 6);
 809 }
 810 #endif /* CONFIG_CMD_TFTPSRV */
 811